Indiana University-Purdue University Indianapolis (IUPUI) / This dissertation proposes a framework (TruSStReMark - Trust-based Service Selection and Recommendation for Online Software Marketplaces) to model, quantify, and monitor trust of software services and to perform trust-based service selection and recommendations. It provides methods to analyze and aggregate external reviews, pertaining to specific QoS attributes, of software services by performing subjective logic-based operations. This framework, first, defines trust of a software service using theory of belief and extends the multi-level software specifications to represent the trust-based attributes. It, then, proposes enhancements to two prevalent algorithms for selecting and recommending software services from a marketplace. Finally, the performances of the enhanced selection and recommendation algorithms are improved by parallelizing them. When compared with the prevalent Content-based and Collaborative filtering-based approaches, the results show that, the TruSStReMark is able to produce better results in terms of quality measured using HR (Hit Ratio) and ARHR (Average Reciprocal Hit-Rank) metrics. In addition, the parallelized versions of the trust-based selection and recommendation algorithms improve the end-to-end runtime. The TruSStReMark will enable users to select services, which are trustworthy, from online software marketplaces and use them in composing quality-aware distributed systems.

Indiana University-Purdue University Indianapolis (IUPUI) / Black representation in American business leadership ranks is not proportionate to America’s demographics. Previous research into this issue has mostly focused on the relationship between majority racial group and minority racial groups. However, research in identity denial and backlash shows that ingroup members may also play a negative role in undermining leadership efforts. African Americans may react negatively to a Black business leader because of the mismatch between negative stereotypes of African Americans and the positive prototype of a leader. The current study hypothesizes that resembling a business leader as an African American leads to negative reaction from other African Americans in the form of lowered trust, lowered endorsement as leader, and lowered intention to engage in organizational citizenship behavior. The current study also hypothesizes that participant’s ingroup identification level will act as a moderator, and that perceived racial identification will act as a mediator. To test the hypotheses, participants recruited from Amazon Mechanical Turk were randomly assigned to either the strong match to leader prototype condition, weak match condition, or control condition in which no information about leader prototype was provided. The results revealed a simple main effect in which strongly matching the leader prototype led to lower levels of the outcome variables. The current study brings attention to an area of research that should be further explored and suggests that organizations should create interventions to counteract this negative ingroup effect.

Indiana University-Purdue University Indianapolis (IUPUI) / Social harm involves incidents resulting in physical, financial, and emotional hardships such as crime, drug overdoses and abuses, traffic accidents, and suicides. These incidents require various law-enforcement and emergency responding agencies to coordinate together for mitigating their impact on the society. With the advent of advanced networking and computing technologies together with data analytics, law-enforcement agencies and people in the community can work together to proactively reduce social harm. With the aim of effectively mitigating social harm events in communities, this thesis introduces a distributed web application, Community Data Analytic for Social Harm (CDASH). CDASH helps in collecting social harm data from heterogenous sources, analyzing the data for predicting social harm risks in the form of geographic hotspots and conveying the risks to law-enforcement agencies. Since various stakeholders including the police, community organizations and citizens can interact with CDASH, a need for a trust framework arises, to avoid fraudulent or mislabeled incidents from misleading CDASH. The enhanced system, called Trusted-CDASH (T-CDASH), superimposes a trust estimation framework on top of CDASH. This thesis discusses the importance and necessity of associating a degree of trust with each social harm incident reported to T-CDASH. It also describes the trust framework with different trust models that can be incorporated for assigning trust while examining their impact on prediction accuracy of future social harm events. The trust models are empirically validated by running simulations on historical social harm data of Indianapolis metro area.

Denna studie syftar till att undersöka och analysera enhetschefer inom offentlig vård ochomsorg och deras upplevelse gällande covid-19 pandemins inverkan på tillitsbaserat ledarskap.Covid-19 pandemin innebar en risksituation för samhällets grundläggande funktioner, hälsa ochfrihet vilket definierar covid-19 som en samhällskris. Det finns en hel del forskning på hur enkris kan påverka ett ledarskap men det finns en begränsad mängd forskning på hur justtillitsbaserat ledarskap kan påverkas av en kris.Semistrukturerade intervjuer utfördes med åtta enhetschefer inom vård och omsorg som varverksamma inom särskilt boende och hemtjänst. Enhetschefer i denna kontext avser förstalinjens chefer. Intervjuerna har analyserats tematiskt varav två huvudteman togs fram.Förhållningssätt och förutsättningar till tillitsbaserad styrning och möjligheter för utförandeav arbetsuppgifter. Vår teoretiska utgångspunkt har i huvudsak varit tillitsbaserat ledarskap,KASAM (känsla av sammanhang) och Top-down/bottom-up.De mest framträdande resultaten är att informanternas förhållningssätt till tillitsbaseratledarskap inte har ändrats nämnvärt under covid- 19 pandemin. Däremot har förutsättningarnaför att leda tillitsbaserat förändrats i och med ständigt förändrade ramar utifrån nya direktiv.Chefernas dagliga arbete har påverkats och nya frågor och prioriteringar har uppstått till följdav covid-19 pandemin. Slutsatserna vi drar är att en pandemi inte behöver påverka inställningentill tillitsbaserat ledarskap. Däremot kan en pandemi påverka möjligheterna ochförutsättningarna att leda utifrån filosofin. Vidare kan arbetsuppgifterna påverkas av ändradeförutsättningar

京都大学 / 0048 / 新制・課程博士 / 博士(社会健康医学) / 甲第19276号 / 社医博第67号 / 新制||社医||9(附属図書館) / 32278 / 京都大学大学院医学研究科社会健康医学系専攻 / (主査)教授 中山 健夫, 教授 川上 浩司, 教授 福原 俊一 / 学位規則第4条第1項該当 / Doctor of Public Health / Kyoto University / DFAM

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Technology is moving forward, as well as the problem with the fast fashion industry. Hence, second hand online shopping is growing because of this. Therefore, the purpose of this thesis is to explain the impacts of perceived quality, customer expectations and trust on customer satisfaction in online second hand shopping? To be able to conduct this research, the theoretical framework includes the dependent variable Customer satisfaction and the three independent variables, perceived quality, customer expectations and trust. These variables led to three hypotheses created by the authors. Through a deductive approach and within quantitative research a questionnaire was made to gather data that was published on social media platforms. The data was collected through convenience sampling within the population chosen. However, both ethical and societal issues have been taken into account while doing the questionnaire and conducting the data. The collected data was runned through SPSS to create statistical models and test the three hypotheses created. Thereafter it could be seen that hypothesis 1 was accepted and hypotheses 2 and 3 were rejected. This concluded that only perceived quality has a positive effect on customer satisfaction in a second hand online shopping context.

Social media usage in the B2B sector is increasing at a slower rate than B2C and the research literature sends a unanimous message; B2B firms would benefit in multiple ways using social media as a tool when establishing and entertaining business relationships. The concept of trust is proved to be of great importance in the construction of these relationships. With guidance of this thesis’ practical contribution,the model The Hourglass of Trust, displaying three categories of trust; creation, maintenance and destruction, this thesis will simultaneously highlight the theoretical contribution: aspects affecting trust, as well as the managerial contribution: aid B2B insocial media strategy planning for improved opportunities to build better business relationships on social media. A key finding and theoretical contribution, is the activity of switching channels from social media to other marketing channels such as email. Some B2B marketers use social media only as a storefront, a one-way promotion tool to create trust in order to reach an audience, create leads, stimulate interest or in the initial contact with another firm and then switch to the usage of other channels like email once the relationship has moved past the trust creation category. This finding is of particular interest since Sweden is a country built upon social trust and has a high social media penetration which may beviewed as counter intuitive when social media is used as a one-way-communication channel such as a storefront. B2B marketers in the empirical findings view social mediain a more positive light than earlier research, stating it is a powerful tool for building long-term business relationships. A second key finding is that personal values are associated with trust creation and trust maintenance in B2B, turning the spotlight from inter-organizational to interpersonal trust. Future research is encouraged to explore the reason for the switching of channels in B2B SMEs in Sweden as well as further explore the concept of trust in a B2B social media context testing the proposed model, The Hourglass of Trust (Fig. 2). / Användande av sociala medier inom B2B-sektorn ökar i lägre takt än inom B2C och forskningslitteraturens bidrag är unisont; B2B-företag skulle gynnas av att använda sociala medier som verktyg på flera sätt när de etablerar och underhåller affärsrelationer. Konceptet förtroende visar sig ha stor betydelse för att bygga affärsrelationer. Med ledning av uppsatsens praktiska bidrag, modellen The Hourglassof Trust (Fig. 2), som illustrerar tre kategorier av förtroende; skapande, underhåll och förstörelse, belyses uppsatsens teoretiska bidrag; aspekter som påverkar förtroende. Aspekterna kan bidra till den strategiska planeringen av B2B-marknadsföring i sociala medier och öka möjligheten att bygga bättre affärsrelationer. Ett huvudfynd och teoretiskt bidrag handlar om hur företag byter kanal från sociala medier till andra marknadsföringskanaler såsom mail. En del B2B-marknadsförare använder sociala medier enbart som ett skyltfönster, ett enkelriktat marknadsföringsverktyg för att skapa förtroende genom att nå ut, skapa leads, stimulera intresse eller endast i den inledande kontakten med ett annat företag för att sedan byta kanal och använda till exempel mail istället när relationen tagit sig förbi kategorinskapande av förtroende. Detta fynd är av särskilt intresse då Sverige som land bygger på socialt förtroende där sociala medier även har ett stort genomslag vilket gör att det kan betraktas som motsägelsefullt då sociala medier används som en kanal för envägskommunikation, likt ett skyltfönster. De empiriska resultaten visar att B2B-marknadsförares attityder är mer positiva till sociala medier än tidigare forskning visat och anser att det är ett kraftfullt kostnadseffektivt verktyg för att bygga långsiktiga i affärsrelationer. Ett andra huvudfynd är att personliga värderingar associeras med att skapa och underhålla förtroende i företagsrelationer, vilket vänder strålkastarljuset från interorganisatoriskt förtroende till interpersonellt förtroende. Vidare forskning uppmuntras att undersöka orsaken till att svenska B2B SMEs byter kanaler samt vidare undersöka B2B-förtroendet på sociala medier med hjälp av Hourglass of trust.