111 research outputs found
Design Science Research and the Grounded Theory Method: Characteristics, Differences, and Complementary Uses
No full textThe information systems (IS) research community is characterized by a large diversity of research approaches and topics. Although empirical quantitative research approaches dominate (Orlikowski et al. 1991), new research strategies are on the rise. Two research strategies that have received increasing scholarly attention recently are design science research (DSR) and the grounded theory method (GTM). For example, the European Journal of Information Systems (EJIS) recently published a special issue on DSR edited by Baskerville (2008). In addition, there is a call for papers by the same journal for a special issue on the GTM which will appear in the near future
Sunflower Lecithin Emulsion Applications
No full textLecithin is a mixture of acetone-insoluble phospholipids. These compounds contain lipophilic fatty acyl groups and hydrophilic head groups; this amphiphilic structure makes lecithin a good surface tension reducing agent, and thus a good emulsifier. Modifications are essential for achieving and adjusting optimal ratios between lecithin’s hydrophilic and lipophilic properties, and for ensuring good food processing ability. The most common processes for lecithin modification are deoiling, fractionation with absolute ethanol to produce phosphatidylcholine or phosphatidylinositol enriched fractions, or enzymatic hydrolysis of these compounds. Emulsifiers and stabilizers play an important role in emulsion stability. This chapter describes some of the main characteristics of lecithin such as phospholipid composition, hydrophilic-lipophilic balance (HLB) values, types and functionalities. It also discusses the effects of different modified sunflower lecithins and the addition of a thickening agent (chia mucilage) on the physical stability of functional oil-in-water (O/W) emulsions as a function of storage time.Fil: Guiotto, Estefania Nancy. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos; ArgentinaFil: Tomás, Mabel Cristina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos; Argentin
Activity matters: investigating the influence of Facebook on life satisfaction of teenage users
No full textAs Facebook has become an integral part of a daily routine for many, the impact of its participation on users’ lives is of growing interest. Nonetheless, extant research does not offer a clear answer on the directionality of the link between Facebook use and markers of subjective well-being. These issues are particularly critical for the vulnerable segment of teenage users. Suggesting both negative and positive outcomes, existing studies are plagued by recall bias, with available findings often undermined by the reliance on aggregated measures of Facebook use. To close these gaps and address unique dynamics of the teen segment, in this study we adopt a diary approach to reliably capture different indicators of FB participation by young adolescents. This method allows us to arrive at more concrete conclusions regarding the counter-acting forces at work when it comes to the influence of Facebook. Based on our analysis, we show that the type of activity matters. Specifically, while such active uses of FB as posting and chatting are positively associated with life satisfaction in young adolescents, passive following has an adverse effect. Theoretically, our findings help getting a more holistic picture of the consequences of SNS use by teens
Will You accept an app? empirical investigation of the cecisional calculus behind the adoption of applications on Facebook
No full textDespite a rapidly increasing number of third-party applications on Facebook and, as a consequence, exploding concerns regarding their data handling practices, little is understood about the rationale behind app installation decisions. Following a Grounded Theory approach and drawing on the results of 20 interviews and textual responses of 392 subjects, we propose a unified model of users’ decision-making process when installing a Facebook app. We conceptualize the decisional calculus behind the adoption of applications and locate it in the proposed process model. To complement our findings, we analyze results of the experiment, finding that trust in the app provider and intrusiveness of the information request have a significant impact on willingness to accept an app for experienced users. The effect of trust, however, disappears once friend recommendation is involved. Nonusers are found to be insensitive to these secondary factors, rather aligning their behavior with the perceived value of the app
Network effects on standard software markets: a simulation model to examine pricing strategies
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Towards an IT-based planning process alignment : Integrated route and location planning for small package shippers
No full textTo increase the efficiency of delivery operations in small package shipping (SPS), numerous optimization models for routeand location planning decisions have been proposed. This operations research view of defining independent problems hastwo major shortcomings: First, most models from literature neglect crucial real-world characteristics, thus making themuseless for small package shippers. Second, business processes for strategic decision making are not well-structured in mostSPS companies and significant cost savings could be generated by an IT-based support infrastructure integrating decisionmaking and planning across the mutually dependent layers of strategic, tactical and operational planning. We present anintegrated planning framework that combines an intelligent data analysis tool, which identifies delivery patterns and changesin customer demand, with location and route planning tools. Our planning approaches extend standard Location Routing andVehicle Routing models by crucial, practically relevant characteristics like the existence of subcontractors on both decisionlevels and the implicit consideration of driver familiarity in route planning
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