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  • 1. Abarenkov, Kessy
    et al.
    Adams, Rachel I.
    Irinyi, Laszlo
    Agan, Ahto
    Ambrosio, Elia
    Antonelli, Alexandre
    Bahram, Mohammad
    Bengtsson-Palme, Johan
    Bok, Gunilla
    Cangren, Patrik
    Coimbra, Victor
    Coleine, Claudia
    Gustafsson, Claes
    He, Jinhong
    Hofmann, Tobias
    Kristiansson, Erik
    Larsson, Ellen
    Larsson, Tomas
    Liu, Yingkui
    Martinsson, Svante
    Meyer, Wieland
    Panova, Marina
    Pombubpa, Nuttapon
    Ritter, Camila
    Ryberg, Martin
    Svantesson, Sten
    Scharn, Ruud
    Svensson, Ola
    Univ Gothenburg, Dept Biol & Environm Sci, Box 461, S-40530 Gothenburg, Sweden.
    Topel, Mats
    Unterseher, Martin
    Visagie, Cobus
    Wurzbacher, Christian
    Taylor, Andy F. S.
    Koljalg, Urmas
    Schriml, Lynn
    Nilsson, R. Henrik
    Annotating public fungal ITS sequences from the built environment according to the MIxS-Built Environment standard - a report from a May 23-24, 2016 workshop (Gothenburg, Sweden)2016Ingår i: MycoKeys, ISSN 1314-4057, E-ISSN 1314-4049, nr 16, s. 1-15Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Recent molecular studies have identified substantial fungal diversity in indoor environments. Fungi and fungal particles have been linked to a range of potentially unwanted effects in the built environment, including asthma, decay of building materials, and food spoilage. The study of the built mycobiome is hampered by a number of constraints, one of which is the poor state of the metadata annotation of fungal DNA sequences from the built environment in public databases. In order to enable precise interrogation of such data - for example, "retrieve all fungal sequences recovered from bathrooms" - a workshop was organized at the University of Gothenburg (May 23-24, 2016) to annotate public fungal barcode (ITS) sequences according to the MIxS-Built Environment annotation standard (http:// gensc.org/ mixs/). The 36 participants assembled a total of 45,488 data points from the published literature, including the addition of 8,430 instances of countries of collection from a total of 83 countries, 5,801 instances of building types, and 3,876 instances of surface-air contaminants. The results were implemented in the UNITE database for molecular identification of fungi (http://unite.ut.ee) and were shared with other online resources. Data obtained from human/animal pathogenic fungi will furthermore be verified on culture based metadata for subsequent inclusion in the ISHAM-ITS database (http:// its. mycologylab.org).

  • 2.
    Abdallah, Nancy
    University of Nice Sophia Antipolis, CNRS, LJAD, UMR 7351, 06100 Nice, Franc.
    On Hodge Theory of Singular Plane Curves2016Ingår i: Canadian mathematical bulletin, ISSN 0008-4395, Vol. 59, nr 3, s. 449-460Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The dimensions of the graded quotients of the cohomology of a plane curve complement U = P-2/C with respect to the Hodge filtration are described in terms of simple geometrical invariants. The case of curves with ordinary singularities is discussed in detail. We also give a precise numerical estimate for the difference between the Hodge filtration and the pole order filtration on H-2(U, C).

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  • 3.
    Abdallah, Nancy
    University of Nice.
    On Plane Curves with Double and Triple Points2016Ingår i: Mathematica Scandinavica, ISSN 0025-5521, E-ISSN 1903-1807, Vol. 119, nr 1, s. 60-72Artikel i tidskrift (Refereegranskat)
  • 4.
    Abdallah, Nancy
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Altafi, Nasrin
    Department of Mathematics, KTH Royal Institute of Technology, S-100 44 Stockholm, Sweden; Department of Mathematics and Statistics, Queen's University, Kingston, Ontario, K7L 3N6, Canada.
    Iarrobino, Anthony
    Department of Mathematics, Northeastern University, Boston, MA 02115, USA.
    Seceleanu, Alexandra
    Department of Mathematics, University of Nebraska-Lincoln, Lincoln, NE 68588, USA.
    Yaméogo, Joachim
    Université Côte d'Azur, CNRS, LJAD, France.
    Lefschetz properties of some codimension three Artinian Gorenstein algebras2023Ingår i: Journal of Algebra, ISSN 0021-8693, E-ISSN 1090-266X, Vol. 625, s. 28-45Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Codimension two Artinian algebras have the strong and weak Lefschetz propertiesprovided the characteristic is zero or greater than the socle degree. It is open to whatextent such results might extend to codimension three Artinian Gorenstein algebras. De-spite much work, the strong Lefschetz property for codimension three Artinian Gorensteinalgebra has remained largely mysterious; our results build on and strengthen some of theprevious results. We here show that every standard-graded codimension three ArtinianGorenstein algebra A having maximum value of the Hilbert function at most six has thestrong Lefschetz property, provided that the characteristic is zero. When the characteris-tic is greater than the socle degree of A, we show that A is almost strong Lefschetz, theyare strong Lefschetz except in the extremal pair of degrees.

  • 5.
    Abdallah, Nancy
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Emsalem, Jacques
    Paris, France.
    Iarrobino, Anthony
    Department of Mathematics, Northeastern University, Boston, MA, 02115, USA.
    Nets of conics and associated Artinian algebras of length 72023Ingår i: European Journal of Mathematics, ISSN 2199-675X, E-ISSN 2199-6768, Vol. 9, nr 2, artikel-id 22Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    We classify the orbits of nets of conics under the action of the projective linear group and we determine the specializations of these orbits, using geometric and algebraic methods. We study related geometric questions, as the parametrization of planar cubics. We show that Artinian algebras of Hilbert function H=(1,3,3,0) determined by nets, can be smoothed—deformed to a direct sum of fields; and that algebras of Hilbert function H=(1,r,2,0), determined by pencils of quadrics, can also be smoothed. This portion is a translation and update of a 1977 version, a typescript by the second two authors that was distributed as a preprint of University of Paris VII. In a new Historical Appendix A we describe related work prior to 1977. In an Update Appendix B we survey some developments since 1977 concerning nets of conics, related geometry, and deformations of Artinian algebras of small length.

  • 6.
    Abdallah, Nancy
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Emsalem, Jacques
    Northeastern Univ, Dept Math, Boston.
    Iarrobino, Anthony
    Northeastern Univ, Dept Math, Boston.
    Yaméogo, Joachim
    Univ Cote Azur, CNRS, LJAD, Nice, France.
    Limits of graded Gorenstein algebras of Hilbert function $$(1,3^k,1)$$2024Ingår i: European Journal of Mathematics, ISSN 2199-675X, E-ISSN 2199-6768, Vol. 10, nr 1, artikel-id 9Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Let R= k [x, y, z], the polynomial ring over a field k. Several of the authors previously classified nets of ternary conics and their specializations over an algebraically closed field, Abdallah et al. (Eur J Math 9(2), Art. No. 22, 2023). We here show that when k is algebraically closed, and considering the Hilbert function sequence T =(1,3(k),1), k >= 2 (i.e. T = (1, 3, 3, ... , 3, 1) where k is the multiplicity of 3), then the family GT parametrizing graded Artinian algebra quotients A = R/I of R having Hilbert function T is irreducible, and G(T) is the closure of the family Gor(T) of Artinian Gorenstein algebras of Hilbert function T. We then classify up to isomorphism the elements of these families Gor(T) and of G(T). Finally, we give examples of codimension 3 Gorenstein sequences, such as (1, 3, 5, 3, 1), for which G(T) has several irreducible components, one being the Zariski closure of Gor(T).

  • 7.
    Abdallah, Nancy
    et al.
    Linköpings Universitet.
    Hansson, Mikael
    Linköpings Universitet.
    Hultman, Axel
    Linköpings Universitet.
    Topology of posets with special partial matchings2019Ingår i: Advances in Mathematics, ISSN 0001-8708, E-ISSN 1090-2082, Vol. 348, s. 255-276Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Special partial matchings (SPMs) are a generalisation of Brenti's special matchings. Let a pircon be a poset in which every non-trivial principal order ideal is finite and admits an SPM. Thus pircons generalise Marietti's zircons. We prove that every open interval in a pircon is a PL ball or a PL sphere. It is then demonstrated that Bruhat orders on certain twisted identities and quasiparabolic W-sets constitute pircons. Together, these results extend a result of Can, Cherniaysky, and Twelbeck, prove a conjecture of Hultman, and confirm a claim of Rains and Vazirani.

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  • 8.
    Abdallah, Nancy
    et al.
    Linköpings Universitet.
    Hultman, Axel
    Linköpings Universitet.
    Combinatorial invariance of Kazhdan–Lusztig–Vogan polynomials for fixed point free involutions2017Ingår i: Journal of Algebraic Combinatorics, ISSN 0925-9899, E-ISSN 1572-9192, Vol. 47, nr 4, s. 543-560Artikel i tidskrift (Refereegranskat)
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  • 9.
    Abdallah, Nancy
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Schenck, Hal
    Free resolutions and Lefschetz properties of some Artin Gorenstein rings of codimension four2024Ingår i: Journal of symbolic computation, ISSN 0747-7171, E-ISSN 1095-855X, Vol. 121, s. 102257-102257, artikel-id 102257Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In (Stanley, 1978), Stanley constructs an example of an Artinian Gorenstein (AG) ring A with non-unimodal H-vector (1,13,12,13,1). Migliore-Zanello show in (Migliore and Zanello, 2017) that for regularity r=4, Stanley's example has the smallest possible codimension c for an AG ring with non-unimodal H-vector.

    The weak Lefschetz property (WLP) has been much studied for AG rings; it is easy to show that an AG ring with non-unimodal H-vector fails to have WLP. In codimension c=3 it is conjectured that all AG rings have WLP. For c=4, Gondim shows in (Gondim, 2017) that WLP always holds for r≤4 and gives a family where WLP fails for any r≥7, building on Ikeda's example (Ikeda, 1996) of failure for r=5. In this note we study the minimal free resolution of A and relation to Lefschetz properties (both weak and strong) and Jordan type for c=4 and r≤6.

  • 10.
    Abdallah, Nancy
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Schenck, Hal
    Department of Mathematics, Auburn University, Auburn, AL, 36849, USA.
    Nets in P^2 and Alexander Duality2023Ingår i: Discrete & Computational Geometry, ISSN 0179-5376, E-ISSN 1432-0444Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A net in P^2 is a configuration of lines A and points X satisfying certain incidence properties. Nets appear in a variety of settings, ranging from quasigroups to combinatorial design to classification of Kac–Moody algebras to cohomology jump loci of hyperplane arrangements. For a matroid M and rank r, we associate a monomial ideal (a monomial variant of the Orlik–Solomon ideal) to the set of flats of M of rank ≤r. In the context of line arrangements in P^2, applying Alexander duality to the resulting ideal yields insight into the combinatorial structure of nets.

  • 11.
    Abelli, Björn
    Högskolan i Borås, Institutionen Handels- och IT-högskolan.
    Directing and Enacting the Information System2007Ingår i: Advances in Information Systems Development - New Methods and Practice for the Networked Society. / [ed] W Wojtkowski, W. G. Wojtkowski, J. Zupancic, G. Magyar, G. Knapp, Springer US , 2007, s. 13-23Kapitel i bok, del av antologi (Övrigt vetenskapligt)
  • 12.
    Abelli, Björn
    Högskolan i Borås, Institutionen Handels- och IT-högskolan.
    On Stage! Playwriting, Directing and Enacting the Informing Processes2007Doktorsavhandling, monografi (Övrigt vetenskapligt)
  • 13. Aboh, I. J. Kwame
    et al.
    Henriksson, Dag
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Laursen, Jens
    Lundin, Magnus
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Gormon Ofosu, Francis
    Pind, Niels
    Selin Lindgren, Eva
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Wahnström, Tomas
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Identification of Aerosol Particle Sources in Semi-rural of Kwabenya, near Accra, Ghana2008Konferensbidrag (Övrigt vetenskapligt)
  • 14. Aboh, I. J. Kwame
    et al.
    Henriksson, Dag
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Laursen, Jens
    Selin Lindgren, Eva
    Lundin, Magnus
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Pind, Niels
    Wahnström, Tomas
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Air Pollution and Meteorology: Ambient PM2.5 Aerosol Origin Studied by Factor Analysis of Elemental Composition Related to Wind Data2008Konferensbidrag (Övrigt vetenskapligt)
  • 15. Abormegah, Jude Edem
    et al.
    Bahadin Tarik, Dashti
    Transitioning Business Intelligence from reactive to proactive decision-making systems: A qualitive usability study based on Technology Acceptance Model2020Självständigt arbete på avancerad nivå (magisterexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Nowadays companies are in a dynamic environment leading to competition in finding new revenue streams to strengthen their positions in their markets by using new technologies to provide capabilitiesto organize resources whilst taking into account changes that can occur in their environment. Therefore, decision making is inevitable to combat uncertainties where taking the optimal action by leveraging concepts and technologies that support decision making such as Business Intelligence (BI)tools and systems could determine a company’s future. Companies can optimize their decision making with BI features like Data-Driven Alerts that sends messages when fluctuations occur within a supervised threshold that reflects the state of business operations. The purpose of this research was to conduct an empirical study on how Swedish companies and enterprises located in different industries apply BI tools and with Data-driven Alerts features for decision making whereby we further studied the characteristics of Data-driven Alerts in terms of usability from the perspectives of different industry professionals through the thematic lens of the Technology acceptance model (TAM) in a qualitative approach. We conducted interviews with professionals from diverse organizations where we applied the Thematic Coding technique on empirical results for further analysis. We found out that by allowing possibilities for users to analyze data in their own preferences for decisions, it will provide managers and leaders with sufficient information needed to empower strategic and tactical decision-making. Despite the emergence of state-of-the-art predictive analytics technologies such as Machine Learning and AI, the literature clearly states that these processes are technical and complex to be comprehended by the decision maker. At the end of the day, prescriptive analytics will end up providing descriptive options being presented to the end user as we move towards automated decision making. This we see as an opportunity for reporting tools and data-driven alerts to be in contemporary symbiotic relationship with advanced analytics in decision making contexts to improve its outcome, quality and user friendliness.

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  • 16. Abrahamsson, Alexander
    et al.
    Arvidsson, Wictor
    Svenskarnas syn på självkörande bilar och dess etiska och moraliska konsekvenser2023Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Artificiell intelligens är ett fenomen som bara blir större och större i världen och i Sverige. Teknologin börjar bli allt vanligare för att bilar ska kunna köra sig själva, med andra ord självkörande bilar. I dagsläget har Sverige ingen lagstiftning för helt självkörande bilar i Sverige. Genom en kvantitativ undersökning har allmänhetens inställning och godkännande av fenomenet i Sverige undersökts. Vidare har studien undersökt vem den svenska befolkningen anser borde stå till svars i bilolyckor med självkörande bilar. Författarna kunde konstatera att lagstiftningen ligger efter tekniken och för att de helt självstyrande bilarna ska kunna implementeras i Sverige borde det ske en förändring i lagstiftningen för att bemöta den allmänna uppfattningen kring självkörande bilar i Sverige. Studiens resultat kom fram till att en ändring av den gällande lagstiftningen borde bli aktuell där lagen gynnar människor samt företagen bakom tekniken, inte bara som det är nu att lagen enbart gynnar biltillverkarna då de inte har något ansvar vid bilolyckor med halvt självkörande bilar. För att människor ska känna tillit till tekniken behövs det en större kunskap kring fenomenet. Detta skulle biltillverkarna kunna fixa genom att låta användaren av bilen ha en större vetskap över till exempel den data som företagen samlar in samt vad den används till. 

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    2023KANI01
  • 17. Acín, Antonio
    et al.
    Pironio, Stefano
    Vértesi, Tamás
    Wittek, Peter
    Högskolan i Borås, Akademin för bibliotek, information, pedagogik och IT.
    Optimal randomness certification from one entangled bit2016Ingår i: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 93, nr 4Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    By performing local projective measurements on a two-qubit entangled state one can certify in a device-independent way up to one bit of randomness. We show here that general measurements, defined by positive-operator-valued measures, can certify up to two bits of randomness, which is the optimal amount of randomness that can be certified from an entangled bit. General measurements thus provide an advantage over projective ones for device-independent randomness certification.

  • 18. Adamsson, Anton
    et al.
    Jönsson, Julius
    Datadriven affärsanalys: en studie om värdeskapande mekanismer2021Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Affärsanalys är en ökande trend som många organisationer idag använder på grund av potentialen att fastställa värdefulla insikter, ökad lönsamhet och förbättrad operativ effektivitet. Något som visat sig vara problematiskt då det önskade resultatet inte alltid är en självklarhet. Syftet med studien är att undersöka hur modeföretag kan använda datadriven affärsanalys för att generera positiva insikter genom värdeskapande mekanismer. Utifrån semistrukturerade intervjuer med anställda på ett modeföretag har vi, med utgångspunkt i tidigare forskning, kartlagt hur datadriven affärsanalys brukas för att skapa värde genom att applicera en processmodell på verksamheten. Empirin resulterade i tre värdefulla insikter (1) Det studerade företaget använder affärsanalys för ökad lönsamhet (2) Företagets data tillgångar är tillräckliga för att utvinna värdefulla insikter (3) Vidare såg vi att företaget arbetar med influencers vilket är en ny affärsanalys-funktion som inte definierats i tidigare forskning.

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  • 19.
    Adekunle, Kayode
    et al.
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Cho, Sung-Woo
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Patzelt, Christian
    Blomfeldt, Thomas
    Skrifvars, Mikael
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Impact and flexural properties of flax fabrics and Lyocell fiber-reinforced bio-based thermoset2011Ingår i: Journal of reinforced plastics and composites (Print), ISSN 0731-6844, E-ISSN 1530-7964, Vol. 30, nr 8, s. 685-697Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A bio-based thermoset resin was reinforced with flax fabrics and Lyocell fiber. The effect of different weave architectures was studied with four flax fabrics with different architectures: plain, twill (two different types), and dobby. The effect of the outer ply thickness was studied and characterized with flexural and impact testing. Composites manufactured with plain weave reinforcement had the best mechanical properties. The tensile strength, tensile modulus, flexural strength, flexural modulus, and impact strength were 280 MPa, 32 GPa, 250 MPa, 25 GPa, and 75 kJ/m2, respectively. Reinforcements with twill-weave architecture did not impart appreciable flexural strength or flexural modulus even when the outer thickness was increased. Plain- and dobby (basket woven style)-weave architectures gave better reinforcing effects and the flexural properties increased with an increase in outer thickness.Water absorption properties of the composites were studied and it was observed that the hybridization with Lyocell fiber reduced the water uptake. Fieldemission scanning electron microscopy was used to study the micro-structural properties of the composites.

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    FULLTEXT01
  • 20.
    Adekunle, Kayode
    et al.
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Patzelt, Christian
    Kalantar, Adib
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Skrifvars, Mikael
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Mechanical properties of renewable soyean oil thermoset reinforced with jute fabricsand lyocell fiber2011Konferensbidrag (Refereegranskat)
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    FULLTEXT01
  • 21.
    Adekunle, Kayode
    et al.
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Åkesson, Dan
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Bakare, Fatimat
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Skrifvars, Mikael
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Bio-based thermoset resins from soybean and linseed oils for structural composites2011Konferensbidrag (Refereegranskat)
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    FULLTEXT01
  • 22.
    Adekunle, Kayode
    et al.
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Åkesson, Dan
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Skrifvars, Mikael
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Biobased Composites Prepared by Compression Molding with a Novel Thermoset Resin from Soybean Oil and a Natural-Fiber Reinforcement2010Ingår i: Journal of Applied Polymer Science, ISSN 0021-8995, E-ISSN 1097-4628, Vol. 116, nr 3, s. 1759-1765Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Biobased composites were manufactured with a compression-molding technique. Novel thermoset resins from soybean oil were used as a matrix, and flax fibers were used as reinforcements. The air-laid fibers were stacked randomly, the woven fabrics were stacked crosswise (0/90 ), and impregnation was performed manually. The fiber/resin ratio was 60 : 40. The prepared biobased composites were characterized by impact and flexural testing. Scanning electron microscopy of knife-cut cross sections of the specimens was also done to investigate the fiber–matrix interface. Thermogravimetric analysis of the composites was carried out to provide indications of thermal stability. Three resins from soybean oil [methacrylated soybean oil, methacrylic anhydride modified soybean oil (MMSO), and acetic anhydride modified soybean oil] were used as matrices. The impact strength of the composites with MMSO resin reinforced with air-laid flax fibers was 24 kJ/m2, whereas that of the MMSO resin reinforced with woven flax fabric was between 24 and 29 kJ/m2. The flexural strength of the MMSO resin reinforced with air-laid flax fibers was between 83 and 118 MPa, and the flexural modulus was between 4 and 6 GPa, whereas the flexural strength of the MMSO resin reinforced with woven fabric was between 90 and 110 MPa, and the flexural modulus was between 4.87 and 6.1 GPa.

  • 23.
    Adekunle, Kayode
    et al.
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Åkesson, Dan
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Skrifvars, Mikael
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Preparation of biobased composites using novel thermoset polymers from soybean oil and a natural fibre reinforcement2009Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    Health related issues, stringent environmental protection policies, search for cost effective and alternative materials, crave for renewability and sustainability and quest for high performance materials for structural applications give the motivation for research in polymer composites and material science. Due to the health, safety and environmental concerns over the conventional synthetic materials and the legislation against their usage both in domestic and industrial applications, alternatives sources that will be comparable in properties are being sought. There is an emerging market for biodegradable polymers which is expected to increase substantially in the coming years.[1] Preparation of Composites Airlaid and woven flax fibre mats were first treated with 4% sodium hydroxide solution for one hour and then washed with plenty of water. This was done in order to remove any residual impurities. The fibres were dried at room temperature for 24 hr and then dried in a vacuum oven for 1hr at a temperature of 105°С. The 8 sheets of the fibre were hand laid cross- wisely and the impregnation was done manually. The fibre/ resin ratio was about 60% to 40%. Methacrylated soybean oil, methacrylic anhydride and acetic anhydride modified soybean oil were the synthesized matrices used. The compression moulding was done at a temperature of 170°С for 5 min at 40bar. Characterisations The tensile testing was performed based on an ISO-test method for tensile tests on plastic materials. The Charpy impact strength of unnotched specimens was evaluated in accordance with ISO 179 using a Zwick test instrument and scanning electron microscopy analysis was done on the fractured specimens. The composites showed various mechanical properties, having impact strengths between 24 and 63 kJ/m² and tensile strength up to 51MPa.

  • 24.
    Adekunle, Kayode
    et al.
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Åkesson, Dan
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Skrifvars, Mikael
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Synthesis of reactive soybean oils for use as biobased thermoset resins in structural natural fibre composites2008Konferensbidrag (Refereegranskat)
  • 25.
    Adekunle, Kayode
    et al.
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Åkesson, Dan
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Skrifvars, Mikael
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Synthetic modification of reactive soybean oils for use as biobased thermoset resins in structural natural fiber composites2008Konferensbidrag (Övrigt vetenskapligt)
  • 26.
    Adekunle, Kayode
    et al.
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Åkesson, Dan
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Skrifvars, Mikael
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Synthetic modification of reactive soybean oils for use as biobased thermoset resins in structural natural fiber composites2008Ingår i: Polymer Preprints, ISSN 0551-4657, Vol. 49, nr 1, s. 279-Artikel i tidskrift (Refereegranskat)
  • 27. Adrian-Kalchhauser, I
    et al.
    Svensson, Ola
    Högskolan i Borås, Akademin för bibliotek, information, pedagogik och IT.
    Kutschera, VE
    Alm Rosenblad, M
    Pippel, M
    Winkler, S
    Schloissnig, S
    Blomberg, A
    Burkhardt-Holm, P
    Pomatoschistus minutus voucher NRM:NRM69326 mitochondrion, complete genome: GenBank: MW0928272020Övrigt (Refereegranskat)
    Abstract [en]

    The complete Pomatoschistus minutus mitochondrion genome. The voucher NRM:NRM69326 is stored at The Swedish Museum of Natural History, Stockholm, Sweden. The Genbank Accession number of the annotated sequence MW092827.

  • 28. Adrian-Kalchhauser, Irene
    et al.
    Svensson, Ola
    Univ Gothenburg, Dept Biol & Environm Sci, Medicinaregatan 18A, S-41390 Gothenburg, Sweden.
    Kutschera, Verena E.
    Rosenblad, Magnus Alm
    Pippel, Martin
    Winkler, Sylke
    Schloissnig, Siegfried
    Blomberg, Anders
    Burkhardt-Holm, Patricia
    The mitochondrial genome sequences of the round goby and the sand goby reveal patterns of recent evolution in gobiid fish2017Ingår i: BMC Genomics, E-ISSN 1471-2164, Vol. 18Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Background: Vertebrate mitochondrial genomes are optimized for fast replication and low cost of RNA expression. Accordingly, they are devoid of introns, are transcribed as polycistrons and contain very little intergenic sequences. Usually, vertebrate mitochondrial genomes measure between 16.5 and 17 kilobases ( kb). Results: During genome sequencing projects for two novel vertebrate models, the invasive round goby and the sand goby, we found that the sand goby genome is exceptionally small (16.4 kb), while the mitochondrial genome of the round goby is much larger than expected for a vertebrate. It is 19 kb in size and is thus one of the largest fish and even vertebrate mitochondrial genomes known to date. The expansion is attributable to a sequence insertion downstream of the putative transcriptional start site. This insertion carries traces of repeats from the control region, but is mostly novel. To get more information about this phenomenon, we gathered all available mitochondrial genomes of Gobiidae and of nine gobioid species, performed phylogenetic analyses, analysed gene arrangements, and compared gobiid mitochondrial genome sizes, ecological information and other species characteristics with respect to the mitochondrial phylogeny. This allowed us amongst others to identify a unique arrangement of tRNAs among Ponto-Caspian gobies. Conclusions: Our results indicate that the round goby mitochondrial genome may contain novel features. Since mitochondrial genome organisation is tightly linked to energy metabolism, these features may be linked to its invasion success. Also, the unique tRNA arrangement among Ponto- Caspian gobies may be helpful in studying the evolution of this highly adaptive and invasive species group. Finally, we find that the phylogeny of gobiids can be further refined by the use of longer stretches of linked DNA sequence.

  • 29.
    Ahlborg, Arvid
    Högskolan i Borås, Akademin för bibliotek, information, pedagogik och IT.
    Kommuners val av e-tjänster: En kvalitativ intervjustudie2023Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Sveriges kommuner står inför stora utmaningar i framtiden med att kunna tillhandhålla de välfärdstjänster som förväntas av dem, detta framförallt på grund av en ökande äldre befolkning. För att klara av dessa utmaningar har digitalisering och utnyttjandet av dagens teknik lyfts fram som en lösning, där e-tjänster har en betydande roll för kommuner. Samtidigt har flera kommuner uppgett att de har problem med att hinna med att utveckla e-tjänster i takt med samhällsutveckling samt att befintliga e-tjänster inte används i den utsträckning som förväntas. Syftet med studien är således att utforska fenomenet “införandet av e-tjänster” inom kommuner i Sverige, med fokus på varför kommuner väljer att införa de e-tjänster de gör. En kvalitativ metod har använts där en små-N-studie har genomförts. Datainsamlingen har bestått av sju semistrukturerade intervjuer där totalt åtta olika kommuner ingått. Respondenterna har valts ut baserat på den information de kunnat förse. En innehållsanalys har sedan genomförts där ett antal kategorier har identifierats genom öppen och axial kodning. Resultat och analysen visar att kommunernas val av e-tjänster påverkas av hur de identifierar och hantera idéer på e-tjänster, en samling av olika hinder för införandet av e-tjänster samt deras samarbeten med andra kommuner och offentliga organ gällande e-tjänster. Studien kan bidra med en ökad medvetenhet för kommunerna om varför de väljer de e-tjänster de gör, vilket kan underlätta och förbättra deras arbete med e-tjänster. Detta kan hjälpa kommunerna att uppnå den potential som finns med e-tjänster och bemöta de utmaningar de står inför i framtiden. 

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    2023KANI02
  • 30. Ahlqvist, Martin
    Grön webbutveckling: En kvalitativ intervjustudie om webbutvecklares arbete med hållbar ekologisk webbutveckling2019Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    This study aims to examine how web developers work with ecologically sustainable web development and what may impel them to do so. The global impact from the use and development of web products and services are growing in a steady pace. This was inves-tigated through a qualitative study including semi structured interviews with five web developers.

    Results and analysis show that web developers today do not work to any great extent with ecologically sustainable web development. The biggest reason for this is ignorance and that there is no correct definition of what it means. Web developers' attitudes are positive towards such work, but the drivers do not match the attitudes, since sustainable work is not a priority. The study shows that there are both opportunities and obstacles to work with ecologically sustainable web development. The greatest opportunities lie in the fact that interest in sustainability increases and that it has positive effects. The biggest obstacles are ignorance and the fact that sustainability is not yet given high priority.

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    fulltext
  • 31.
    Ahlqvist, Petter
    et al.
    Högskolan i Borås, Akademin för bibliotek, information, pedagogik och IT.
    Vagiström, Johan
    Högskolan i Borås, Akademin för bibliotek, information, pedagogik och IT.
    Kravställning på Incidenthanteringssystem2015Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Användandet av IT relaterade tjänster har ökat kraftigt de senaste åren och visar inga tecken på att avstanna. Men i takt med att användningen ökar så ökar även riskerna, för vad händer egentligen när de IT-tjänster som så många företag och privatpersoner förlitar sig på plötsligt fallerar eller på annat sätt blir oåtkomliga? För att skydda sig mot sådana scenarier så blir det allt vanligare bland företag som driver IT-tjänster att använda sig incidenthantering, vars syfte är att genom fördefinierade processer återställa IT-tjänster till fungerande läge när en incident väl inträffar. För att implementera en incidenthanteringsprocess är det vanligt att verksamheter använder någon form av ramverk eller metod för att underlätta och effektivisera arbetet, i skrivande stund heter de mest använda ramverken ITIL och COBIT.

    Det är mycket vanligt att en incidenthanteringsprocess i en verksamhet bygger på någon form av system eller applikation vars syfte är att underlätta och effektivisera hanteringen av incidenter, ett sådant system benämns ofta som incidenthanteringssystemet. Trots att ramverk som ITIL och COBIT är använda i stor utsträckning världen över så uppstår det ett problem i att de båda saknar fokus på incidenthanteringssystemet och vad ett sådant system skall klara av. För när ramverken inte tar upp en sådan central del av incidenthanteringsprocessen så innebär det att den implementerande verksamheten själva måste lägga tid och resurser på att reda ut hur ett sådant system skall fungera.

    Denna studie adresserar problemet med att de vanligast använda ramverken för incidenthantering inte behandlar det, för processen, så centrala incidenthanteringssystemet genom att undersöka och besvara följande forskningsfrågor.

    Vilka implicita och explicita krav bör ett incidenthanteringssystem uppfylla?

    Vilka krav på incidenthanteringssystemet går att utläsa från de mest använda ramverken för incidenthantering?

    Hur matchar de framtagna kraven de krav som ställts av en verksamhet ur näringslivet?

    Denna studie riktar sig framförallt till de verksamheter eller individer som anser sig ha nytta av en sammanställning av de krav som ett incidenthanteringssystem bör uppfylla och kan fungera som ett stöd vid implementering eller inköp av ett nytt incidenthanteringssystem. Genom att identifiera kraven som ställs på ett incidenthanteringssystem utifrån de mest använda ramverken för incidenthantering så bidrar studien med resurser för implementationen av nämnt system drastiskt minskar. Samt genom att presentera ett konkret exempel, fallstudien, och jämföra det med kraven från ramverken bidrar studien med en referenspunkt för verksamheter att utgå ifrån när de implementerar eller köper ett nytt incidenthanteringssystem.

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    2015KSAI02
  • 32.
    Ahlström, Peter
    et al.
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Aim, Karel
    Dohrn, Ralf
    Elliott, J. Richard
    Jackson, George
    Jaubert, Jean-Noel
    Rebello de A. Macedo, Maria Eugénia
    Pokki, Juha-Pekka
    Reczey, Kati
    Victorov, Alexey
    Fele Zilnik, Ljudmila
    Economou, Ioannis
    A Survey of Thermodynamics and Transport Properties in Chemical Engineering Education in Europe and the USA2008Ingår i: Proceedings of the 100th Annual Meeting of the American Institute for Chemical Engineering, 2008Konferensbidrag (Refereegranskat)
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    FULLTEXT01
  • 33.
    Ahlström, Peter
    et al.
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Gebäck, Tobias
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Johansson, Erik
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Bolton, Kim
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Water absorption in polymers2010Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    In this work two different examples of water absorbtion in polymers are studied by Monte Carlo simulations. Both of them are of large technical and commercial impotance. The first example is the water absorption in polyethylene cables where the water absorption plays a crucial role in the degradation of the cable insulation and thus should be as low as possible. The second example is bio-based superabsorbents made from denatured protein where water absorption capability is the prime desired property. Methods Gibbs Ensemble Monte Carlo simulations [1] were used to study the hydration of polymers. All simulations are performed with two boxes, one of which is filled with water at the start of the simulation, whereas the other contains polymer molecules and possible ions. The polymer molecules are not allowed to swap boxes whereas the water molecules are allowed to do so thus constituting an osmotic Gibbs ensemble [2]. For the polyethylene a connectivity-altering algorithm was used whereas the protein molecules were simulated using a side-chain regrowth model in addition to traditional Monte Carlo moves. For the polyethylene, the TraPPE [3] force field was used and the protein molecules, the Amber force field [4] was used. Water was modelled using simple point charge models [5]. Electrostatic interactions are treated using Ewald summation methods. The protein molecules were of different amino acid compositions and in different conformations, e.g., β-turns and random coils obtained using the amorphous cell method[6]. Studies were made with different degrees of charging on, e.g., lysine side chains mimicking different ionization states. Results The studies of polyethylene revealed the importance of ions left from the polymerisation catalyst for the absorbtion of water and the concomitant degradation of polyethylene cable insulation. Also the absorption properties of the protein molecules is strongly related to the presence of charged groups and fully charged protein molecules absorb large amounts of water. However, neither native nor denatured protein molecules show superabsorbing properties (i.e. absorbing hundreds of times their own mass) as they show in experimental studies and the reasons for this discrepancy will be discussed. References 1. A.Z. Panagiotopoulos, Mol. Phys. 61, 813 (1987). 2. E. Johansson, K. Bolton, D.N. Theodorou, P. Ahlström, J. Chem. Phys., 126, 224902 (2007). 3. M.G. Martin, and J.I. Siepmann, J. Phys. Chem. B, 103, 4508-4517 (1999). 4. W.D. Cornell, P. Cieplak, C.I. Bayly, I.R. Gould, K.M. Merz Jr, D.M. Ferguson, D.C. Spellmeyer, T. Fox, J.W. Caldwell, P.A. Kollman (1995). J. Am. Chem. Soc. 117, 5179–5197. 5. H. J. C. Berendsen, J. P. M. Postma and W. F. van Gunsteren, in Intermolecular Forces, B. Pullman, ed. (Reidel, Dordrecht, 1981) p. 331; H. J. C. Berendsen, J. R. Grigera and T. P. Straatsma, J. Phys. Chem. 91, 6269 (1987). 6. D.N. Theodorou, U.W. Suter, Macromolecules, 18, 1467 (1985).

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    FULLTEXT01
  • 34.
    Ahlström, Peter
    et al.
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Moodley, Suren
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Bolton, Kim
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Ramjugernath, D.
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Computer Simulations of Vapor-Liquid-Liquid Equilibria Involving Hydrocarbons and Water2008Ingår i: Proceedings of the 100th Annual Meeting of the American Institute for Chemical Engineering, 2008, CHPC National Meeting, Durban, South Africa, December 9-10, 2008, AlChe Annual Meeting, Philadelphia, November 15-21, 2008, 2008Konferensbidrag (Övrigt vetenskapligt)
    Ladda ner fulltext (pdf)
    FULLTEXT01
  • 35.
    Ahmed, Mohammad Tofayel
    et al.
    Department of Organic Material Science and Engineering, Pusan National University, Busan 46241, South Korea.
    Morshed, Mohammad Neaz
    Högskolan i Borås, Akademin för textil, teknik och ekonomi. Department of Textile Engineering, Southeast University, Dhaka 1215, Bangladesh.
    Farjana, Syeda
    Department of Textile Engineering, Southeast University, Dhaka 1215, Bangladesh.
    An, Seung Kook
    Department of Organic Material Science and Engineering, Pusan National University, Busan 46241, South Korea.
    Fabrication of new multifunctional cotton-modal-recycled aramid blended protective textiles through deposition of a 3D-polymer coating: high fire retardant, water repellent and antibacterial properties2020Ingår i: New Journal of Chemistry, ISSN 1144-0546, E-ISSN 1369-9261, Vol. 44, nr 28, s. 12122-12133Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This study reports a facile fabrication of multifunctional cotton-modal-recycled aramid blended protective textiles through the deposition of a three-dimensional tetrakis(hydroxymethyl)phosphonium chloride (THPC)-urea polymer coating. For this, blended fabrics with different compositions, weaving structures, thicknesses, GSMs and thread densities have been fabricated, followed by chemical deposition of the THPC-urea polymer coating on the fibrils of the yarn and then in the amorphous region through ammonia treatment. Full characterization of the resulting fabrics through SEM and FTIR allowed confirmation of the deposition of THPC-urea on each blended fabric. Treated and untreated samples were evaluated for their water repellency, flame retardance and antibacterial properties through diverse experimental tools. The results show that the lowest average char length (warp - 3.18 cm, weft - 2.84 cm) and radiant heat flux density (11.021 kW m<SUP>-2</SUP>), and highest LOI% (36.8%), were found in the 40%-cotton-30%-modal-30% aramid fabric, whereas the best thermal protective performance (t<INF>12</INF>- 4.0 s,t<INF>24</INF>- 5.9 s) was observed in the fabric with a high thickness and GSM. Regarding the water repellent properties, all treated samples showed superior water repellence properties expressed as water contact angle (theta<INF>H<INF>2</INF>O</INF>) as high as 141.70 degrees to 151.50 degrees. Besides, the 3D polymer coating deposited on blended fabrics exhibited high antibacterial properties (99.90%) againstStaphylococcus aureusATCC 6538 andKlebsiella pneumoniaeATCC 4352 as calculated according to the KS K 0693:2016 method. These results herein provide fundamental grounds to design blended textiles with necessary functionalities for smart and protective applications.

  • 36.
    Aidemark, Jan
    et al.
    Linnaeus University.
    Askenäs, Linda
    Linnaeus University.
    Nygårdh, Annette
    Jönköping University, HHJ, Avdelningen för omvårdnad.
    Strömberg, Anna
    Linköping University.
    User involvement in the co-design of self-care support systems for heart failure patients2015Ingår i: Procedia Computer Science, E-ISSN 1877-0509, Vol. 64, s. 118-124Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In this paper the nature of user involvement in a co-design process will be explored. The outlines of a research project aiming at developing support systems for self-care inpatients suffering from chronic heart failure will be presented. The project is planned to perform a co-design effort where users (patients and healthcare professionals) will be given the opportunity to influence the development of support systems. We will discuss a number of possibilities and challenges that lie in the design of this kind of project and also some findings from its early stages. This report presents the experiences of users’ input, which are discussed in the context of previous research on benefits of user contributions in systems development.

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    FULLTEXT01
  • 37.
    Akbari, Samira
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Root, Andrew
    MagSol, Tuhkanummenkuja 2, 00970, Helsinki, Finland.
    Skrifvars, Mikael
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Kumar Ramamoorthy, Sunil
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Åkesson, Dan
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Novel Bio-based Branched Unsaturated Polyester Resins for High-Temperature Applications2023Ingår i: Journal of Polymers and the Environment, ISSN 1566-2543, E-ISSN 1572-8919Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Unsaturated polyester resins, one of the most important thermosets, are invariably produced from oil-based monomers. Their application is limited in areas where high thermal stability is required due to their low Tg. Besides, these resins contain 30–40% hazardous styrene as a reactive solvent. Therefore, developing bio-based solventless unsaturated polyester resin with medium to high thermomechanical properties compared to petrochemical-based counterparts is important. In order to achieve this, a series of branched bio-based unsaturated polyester resins were synthesized using bulk polymerization method in two steps. In the first step, four different intermediates were prepared by reacting glycerol (as a core molecule) with either isosorbide (diol), 1,3-propanediol (diol), 2,5-furandicarboxylic acid (saturated diacid), or adipic acid (saturated diacid). In the second step, the branched intermediate was end capped with methacrylic anhydride to introduce reactive sites for cross-linking on the branch ends. The chemical structure of the resins was characterized by 13C-NMR. FT-IR confirmed the polycondensation reaction in the first step and the end functionalization of the resins with methacrylic anhydride in the second step. The effect of 2,5-furandicarboxylic acid and isosorbide on thermomechanical and thermal properties was investigated using dynamic mechanical analysis, differential scanning calorimetry, and thermo-gravimetric analysis. Results indicated that 2,5-furandicarboxylic acid based resins had superior thermomechanical properties compared to a commercial reference unsaturated polyester resin, making them promising resins for high-temperature composite applications. For example, the resin based on 2,5-furandicarboxylic acid and isosorbide and the resin based on 2,5-furandicarboxylic acid and 1,3-propanediol gave glass transition temperatures of 173 °C and 148 °C, respectively. Although the synthesized 2,5-furandicarboxylic acid based resins had higher viscosity (22.7 Pas) than conventional unsaturated polyester (0.4–0.5 Pas) at room temperature, preheated resins can be used for making high-temperature-tolerance fiber-reinforced composite. 

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    fulltext
  • 38.
    Akbas, Meltem Yesilcimen
    et al.
    Department of Molecular Biology and Genetics, Gebze Institute of Technology, Gebze, Turkey.
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Ozcelik, Busra
    Department of Molecular Biology and Genetics, Gebze Institute of Technology, Gebze, Turkey.
    Improved ethanol production from cheese whey, whey powder, and sugar beet molasses by “Vitreoscilla hemoglobin expressing” Escherichia coli2014Ingår i: Bioscience, biotechnology and biochemistry, ISSN 0916-8451, E-ISSN 1347-6947, Vol. 78, nr 4, s. 687-694Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This work investigated the improvement of ethanol production by engineered ethanologenic Escherichia coli to express the hemoglobin from the bacterium Vitreoscilla (VHb). Ethanologenic E. coli strain FBR5 and FBR5 transformed with the VHb gene in two constructs (strains TS3 and TS4) were grown in cheese whey (CW) medium at small and large scales, at both high and low aeration, or with whey powder (WP) or sugar beet molasses hydrolysate (SBMH) media at large scale and low aeration. Culture pH, cell growth, VHb levels, and ethanol production were evaluated after 48 h. VHb expression in TS3 and TS4 enhanced their ethanol production in CW (21–419%), in WP (17–362%), or in SBMH (48–118%) media. This work extends the findings that “VHb technology” may be useful for improving the production of ethanol from waste and byproducts of various sources. 

  • 39.
    Akinbomi, Julius
    et al.
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Brandberg, Tomas
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Sanni, Adebayo
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Taherzadeh, Mohammad
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Development and dissemination strategies for accelerating biogas production in Nigeria2014Ingår i: BioResources, ISSN 1930-2126, E-ISSN 1930-2126, Vol. 9, nr 3, s. 5707-5737Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Following the worsening energy crisis of unreliable electricity and unaffordable petroleum products coupled with the increase number of poverty-stricken people in Nigeria, the populace is desperately in need of cheap alternative energy supplies that will replace or complement the existing energy sources. Previous efforts by the government in tackling the challenge by citizenship sensitization of the need for introduction of biofuel into the country’s energy mix have not yielded the expected results because of a lack of sustained government effort. In light of the shortcomings, this study assesses the current potential of available biomass feedstock for biogas production in Nigeria, and further proposes appropriate biogas plants, depending on feedstock type and quantity, for the six geopolitical zones in Nigeria. Besides, the study proposes government-driven biogas development systems that could be effectively used to harness, using biogas technology, the estimated 270 TWh of potential electrical energy from 181 million tonnes of available biomass, in the advancement of electricity generation and consequent improvement of welfare in Nigeria.

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    fulltext
  • 40.
    Akintunde, Moyinoluwa
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi. Department of Microbiology, University of Ibadan, Ibadan, Nigeria.
    Adebayo-Tayo, B C
    Department of Microbiology, University of Ibadan, Ibadan, Nigeria.
    Ishola, M M
    Department of Energy and Environment, Göteborg Energi, Gothenburg, Sweden.
    Zamani, Akram
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Sárvári Horváth, Ilona
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Bacterial Cellulose Production from agricultural Residues by two Komagataeibacter sp. Strains2022Ingår i: Bioengineered, ISSN 2165-5979, E-ISSN 2165-5987, Vol. 13, nr 4, s. 10010-10025Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Agricultural residues are constantly increasing with increased farming processes, and improper disposal is detrimental to the environment. Majority of these waste residues are rich in lignocellulose, which makes them suitable substrate for bacterial fermentation in the production of valueadded products. In this study, bacterial cellulose (BC), a purer and better form of cellulose, was produced by two Komagataeibacter sp. isolated from rotten banana and kombucha drink using corncob (CC) and sugarcane bagasse (SCB) enzymatic hydrolyzate, under different fermentation conditions, that is, static, continuous, and intermittent agitation. The physicochemical and mechanical properties of the BC films were then investigated by Fourier Transformed Infrared Spectroscopy (FTIR), Thermogravimetry analysis, Field Emission Scanning Electron Microscopy (FESEM), and Dynamic mechanical analysis. Agitation gave a higher BC yield, with Komagataeibacter sp. CCUG73629 producing BC from CC with a dry weight of 1.6 g/L and 1.4 g/L under continuous and intermittent agitation, respectively, compared with that of 0.9 g/L in HS medium. While BC yield of dry weight up to 1.2 g/L was obtained from SCB by Komagataeibacter sp. CCUG73630 under continuous agitation compared to that of 0.3 g/L in HS medium. FTIR analysis showed BC bands associated with cellulose I, with high thermal stability. The FE-SEM analysis showed that BC fibers were highly ordered and densely packed. Although the BC produced by both strains showed similar physicochemical and morphological properties, the BC produced by the Komagataeibacter sp. CCUG73630 in CC under intermittent agitation had the best modulus of elasticity, 10.8 GPa and tensile strength, 70.9 MPa. [GRAPHICS]

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  • 41.
    Akpinar, Ilgin
    et al.
    Istanbul University.
    Unal, Muammer
    Istanbul University.
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Potential antifungal effects of silver nanoparticles (AgNPs) of different sizes against phytopathogenic Fusarium oxysporum f. sp. radicis-lycopersici (FORL) strains2021Ingår i: SN Applied Sciences, ISSN 2523-3963, E-ISSN 2523-3971, Vol. 3, nr 4, s. 506-Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Fusarium species are the primary fungal pathogen affecting agricultural foodstuffs both in crop yield and economic loss. Due to these problems, control of phytopathogenic fungi has become one of the critical problems around the World. Nanotechnology is a new technology with potential in many fields, including agriculture. This study focused on determining potential effects of silver nanoparticles (AgNPs) with different nanosizes (3, 5, 8 and 10 nm) and at different concentrations (12.5–100 ppm) against phytopathogenic Fusarium oxysporum f. sp. radicis-lycopersici (FORL) strains. The maximum antifungal activity was achieved by decreasing nanosize and increasing concentration of AgNPs. Mycelium growth abilities were decreased about 50%, 75% and 90% by AgNPs treatment with 3 nm sizes at 25 ppm, 37.5 ppm and 50 ppm concentrations, respectively. The productivity of fungal biomass in the liquid growth media was found to be too limited at the 25–37.5 ppm of AgNPs concentrations with all sizes. In addition, both septation number and dimensions of micro- and macroconidia were found to be gradually decreased with the application of silver nanoparticles. This work showed that the low concentration of AgNPs could be used as potential antifungal agents and applied for control of phytopathogens.

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  • 42.
    Albinsson, Lars
    et al.
    Högskolan i Borås, Institutionen Handels- och IT-högskolan.
    Curtin, Gregory
    Forsgren, Olov
    Högskolan i Borås, Institutionen Handels- och IT-högskolan.
    Wall, Maria
    Creating and Sustaining Successful Knowledge Management in Purposeful Communities2007Konferensbidrag (Refereegranskat)
  • 43.
    Albinsson, Lars
    et al.
    Högskolan i Borås, Institutionen Handels- och IT-högskolan.
    Curtin, Gregory
    Forsgren, Olov
    Högskolan i Borås, Institutionen Handels- och IT-högskolan.
    Wall, Maria
    Creating and sustaining successful knowledge management in purposeful communities: summary of key experiences from pioneers2008Ingår i: Systems research and behavioral science, ISSN 1092-7026, E-ISSN 1099-1743, Vol. 25, nr 5, s. 615-626Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Based on research organized as a number of workshops, case studies and interviews with experienced practitioners as well as academics, we present in this report the most important findings on how to create and sustain successful knowledge management in a community environment. The cases, workshops and interviews deal specifically with the Microsoft Solutions Sharing Network (SSN) program, but the findings, conclusions and preliminary recommendations can be applied more generally to the development of any knowledge management community. A key conclusion is that the bulk of efforts toward creating successful knowledge management communities focus oil less technical, or softer aspects like leadership, culture, social settings and value of participation. However, these are essential, but not sufficient, ingredients for success. Technical issues, issues regarding development and customization of the tools used to facilitate knowledge management (for example, the SSN web portal), and emerging legal issues surrounding the sharing of intellectual property UP) may be perceived as somewhat less important to the participants, but are nevertheless key factors in the long term success of these communities. It is also concluded that the foundation for successful collaboration is primarily laid in the initial phases of community development. A community must make a positive impression oil its participants from the very beginning because most people will not give it a second chance. In this report we have highlighted three important areas to consider when establishing portals for knowledge management: Leadership, Purpose and Process/Infrastructure. A leadership with high credibility in the subject is needed to lead the participants in the right direction, manage the cultural processes and to make sure that relevant content can be found. Initially it is the content that brings people to a specific community. Thus, there has to be some common purpose that not only needs to be in congruence with the professional role of the participants but also be inspiring for them as well. Additionally, the community should have some sort of process that the participants can understand and suits the way they would like to interact. Face-to-face meetings and networking activities create trust which is important to get the process started. Language, IT platform, support and rules governing the contribution, creation and sharing of 'knowledge' for the community are other concerns that need to be considered within the process. Copyright (c) 2009 John Wiley & Sons, Ltd.

  • 44.
    Albinsson, Lars
    et al.
    Högskolan i Borås, Institutionen Handels- och IT-högskolan.
    Curtin, Gregory
    Forsgren, Olov
    Högskolan i Borås, Institutionen Handels- och IT-högskolan.
    Wall, Maria
    The community Triangle- Success factors for leading Purposeful communities2007Konferensbidrag (Refereegranskat)
  • 45.
    Albinsson, Lars
    et al.
    Högskolan i Borås, Institutionen Handels- och IT-högskolan.
    Forsgren, Olov
    Högskolan i Borås, Institutionen Handels- och IT-högskolan.
    Co-Design: An approach to border crossing, Network broadband Innovation2008Rapport (Övrigt vetenskapligt)
  • 46.
    Albinsson, Lars
    et al.
    Högskolan i Borås, Institutionen Handels- och IT-högskolan.
    Forsgren, Olov
    Högskolan i Borås, Institutionen Handels- och IT-högskolan.
    Lind, Mikael
    Högskolan i Borås, Institutionen Handels- och IT-högskolan.
    Towards a Co-Design Approach for Open Innovation2008Konferensbidrag (Övrigt vetenskapligt)
  • 47.
    Albinsson, Lars
    et al.
    Högskolan i Borås, Institutionen Handels- och IT-högskolan.
    Lind, Mikael
    Högskolan i Borås, Institutionen Handels- och IT-högskolan.
    Forsgren, Olov
    Högskolan i Borås, Institutionen Handels- och IT-högskolan.
    Co-Design: An approach to border crossing, Network Innovation2007Ingår i: Expanding the Knowledge Economy: Issues, Applications, Case Studies. Volume 4, Part 1. / [ed] Paul Cunningham, Miriam Cunningham, IOS Press , 2007, s. 977-983Kapitel i bok, del av antologi (Övrigt vetenskapligt)
  • 48.
    Albinsson, Lars
    et al.
    Högskolan i Borås, Institutionen Handels- och IT-högskolan.
    Lind, Mikael
    Högskolan i Borås, Institutionen Handels- och IT-högskolan.
    Forsgren, Olov
    Högskolan i Borås, Institutionen Handels- och IT-högskolan.
    Ozan, Håkan
    Turning the Internet Around: e-Me: The Students Ideal e-Service2006Konferensbidrag (Refereegranskat)
    Abstract [en]

    Today students, as many other groups of citizens, are offered, indeed required to use, a rapidly increasing number of e-Services. They range from school and course sites to interactions with authorities as well as companies offering student discounts. This paper reports on a pioneering project in Sweden with a radical approach to this, namely to issue the student with a electronic assistant, an e-Me, that schools, authorities and companies are required to address when interacting with the student. A larger number of students and partners, universities, companies and authorities, have been engaged in the design of such an e-Me. It might be thought of as turning the internet around – rather than having students keep track of sites, they will have to come to the students and interact with them in the way specified by them.

  • 49. Albringer, Adam
    et al.
    Engström, David
    AI-implementering i sikte: En fördjupad analys av de avgörande faktorerna för framgång i AI-förberedelser2023Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Denna studie undersöker de svårigheter som företag möter vid implementering av artificiell intelligens (AI) och undersöker strategier för framgångsrik integrering av AI. Genom en kombination av semistrukturerade intervjuer och en omfattande litteraturstudie användes en induktiv metod för att analysera de utmaningar som företag stöter på före implementeringsprocessen. Resultaten avslöjar flera nyckelområden av bekymmer, inklusive teknisk spridning, samarbetsbaserad design, utbildning, arbetsmiljö, arbetsmarknadsdynamik och moraliska överväganden. Genom att ta itu med dessa utmaningar kan företag navigera effektivare genom AI-implementeringens komplexiteter. Denna studie ger insikter om de avgörande faktorer som påverkar framgångsrik integration av AI-system i organisatoriska sammanhang. Förståelsen av dessa utmaningar och användningen av lämpliga strategier är avgörande för företag som vill utnyttja potentialen hos AI. 

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    2023KANI10
  • 50. Ali, Majid
    et al.
    Bashir, Tariq
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Persson, Nils-Krister
    Skrifvars, Mikael
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Optimization of oCVD Process for the Production of Conductive Fibers2011Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    Electro active textile fibers are key components in smart and interactive textile applications. In our previous study, we produced poly(3,4-ethylenedioxythiophene) (PEDOT) coat edviscose fibers by using oxidative chemical vapordeposition (OCVD) technique. We tried FeCl3 as oxidant and found optimum reaction conditions at which better electrical as well as mechanical properties of conductive fibers could be achieved.

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