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"ABSTRAKThis research proposes a mathematical model of the Vehicle Routing Problem with Compartment (VRPC) by considering split delivery, multi product, and time windows. VRPC is variant of VRP which is an extention of the Capacitated Vehicle Routing Problem (CVRP) by considering the used of compartment in the vehicle. Compartment is used to separate different product to be distributed. The application of the VRPC concept in a real system can be found in the distribution system of fuel, oil, recycled waste, or food distribution. The mathematical model is used to determine the route that minimize the distance. AMPL software and CLPEX solver is used to create the mathematical programming of the model and solve it. The proposed mathematical model is Mixed Integer Nonlinear Programming (MINLP). Numerical experiments is conducted to illustrate the use of the model. The experimental results show that the model passed the verification and validation tests."

"Penelitian ini bertujuan untuk menguji pengaruh efikasi guru pada perilaku berbagi pengetahuan dan menguji pengaruh interaksi efikasi guru dan kepercayaan interpersonal pada perilaku berbagi pengetahuan. Penelitian dilakukan pada 269 guru Sekolah Menengah Atas yang mengajar di wilayah Jakarta dan Bekasi dan telah mengajar selama lebih dari 1 (satu) tahun. Teknik analisis dalam penelitian ini menggunakan analisis moderasi dengan menggunakan PROCESS dari Hayess. Teknik pengambilan sampel dalam penelitian ini menggunakan accidental sampling. Perilaku berbagi pengetahuan diukur dengan menggunakan Skala Perilaku Berbagi Pengetahuan, efikasi guru diukur dengan Teacher's Sense of Efficacy Scale (TSES)-short form dan kepercayaan interpersonal diukur dengan Skala Kepercayaan Interpersonal. Hasil penelitian ini menunjukkan bahwa efikasi guru berpengaruh secara signifikan terhadap perilaku berbagi pengetahuan, namu, kepercayaan interpersonal tidak berperan sebagai moderator antara efikasi guru dan perilaku berbagi pengetahuan.

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This study aims to examine the effect of teacher efficacy on knowledge sharing behavior and examine the interaction effect of teacher efficacy and interpersonal trust on knowledge sharing behavior. The study was conducted on 269 high school teachers who taught in the Jakarta and Bekasi area and had taught for more than 1 (one) year. The analysis technique in this study uses moderation analysis using PROCESS from Hayess. The sampling technique in this study used accidental sampling. Knowledge sharing behavior is measured using the Knowledge Sharing Behavior Scale, teacher efficacy is measured by the Teacher's Sense of Efficacy Scale (TSES)-short form and interpersonal trust are measured by the Interpersonal Trust Scale. The results of this study indicate that teacher efficacy has a significant effect on knowledge sharing behavior, however, interpersonal trust does not act as a moderator between teacher efficacy and knowledge sharing behavior."

"ABSTRAKThis research focus on consideration of stochastic demand in deterministic Vehicle Routing Problem with Compartment (VRPC) model. VRPC in this research consider split delivery, multi product, and time windows characteristic. Stochastic demand in this research is handled using scenario-based approach. The demand is modeled by constructing discrete scenarios then implementing it in the deterministic VRPC model. The change of customer demand over time is considered as normal probability distribution. Stochastic VRPC model then solved using robust approach by looking for the highest demand under each scenario to be solve, therefore the solution generated deals with the minimum probability of unmet demand."

"ABSTRAKThe scarcity of blood that is still happening today is the result of a combination of high blood needs and the difficulty of recruiting and maintaining donors. There is no research discover the substitute that can replace the role of blood, therefore the only source is from donations or blood donors. Approximately 80% of total blood donations collected by American Red Cross are come from blood drive events. Because blood has 6-hour spoilage time, donated blood at various donation locations must be collected and sent to a blood center for processing in less than 6 hours. This research study the Maximum Blood Collection Routing Problem (MBCRP). This problem is the extension of Vehicle Routing Problem with Time-Window (VRPTW) by considering the spoilage time limitation in blood. A mathematical model with objective to maximize total blood collection is built to cope with this problem. The mathematical model will be tested for verification and validation. The model is written in a computer programming language using AMPL software and is solved using the CPLEX solver. Furthermore, the results of verification and validation tests will be evaluated to see the applicability of the model."

"Transportation, as a part of the supply chain process, contributes to carbon emission which leads to climate change and global warming. This environmental issue gives an impact to decisions regarding the supply chain of a company. One way to deal with this issue is by analyzing their vehicle routing problem. In this study, the issue about routing problems in green supply chain by considering the heterogeneous fleet is being discussed. One variant of Green Vehicle Routing Problem (GVRP) reviewed in this paper is about Heterogeneous Alternative Fuel Vehicles for Green Vehicle Routing Problem (HAFVGVRP). The purpose of this study is to review the development of GVRP with heterogeneous alternative fuel vehicles and the gap or state-of-the-art on existing researches. The review was classified according to the objectives, type of fleet, and solution used. Moreover, this study also presents the trend and direction of further research."