Coverage reduction: a mathematical model

This paper deals with a mathematical model for reduction of the lack of coverage (LC) involving multiple coverage in presence of partial covering. The model proposes a new structure of assignment of facilities in a facility location system to cover in greater proportion of the demand territory, avoiding assignment of several facilities in the same space of the territory. A comparison between the engendered solution and its representation is carried out through known indicators to measure the improvement of the solution. The results of our proposed model are contrast and better compared to defined referred models in order to evaluate the reduction of LC

Operaciones de localización de contenedores: desarrollo de métodos para problemas de localización de contenedores en terminales portuarias

[ES] El transporte marítimo asume un papel fundamental a nivel mundial en el comercio y su volumen crece año tras año. Este aumento de los flujos de comercio provoca que los puertos deban hacer frente a unos niveles de trabajo cada vez mayores. Con el fin de mejorar la productividad de las terminales y para hacer frente a una carga de trabajo que aumenta progresivamente, las terminales buscan alternativas que les ayuden a ser más competitivas y productivas. Una forma habitual de lograr unos mejores rendimientos consiste en diseñar métodos capaces de optimizar las actividades que se realizan dentro del puerto. Una de estas actividades, la localización de contenedores, es capaz de mejorar notablemente toda la cadena de actividades si se gestiona adecuadamente. Mediante este trabajo, se ofrece una visión de conjunto de los puertos y de las principales operaciones e infraestructuras de una terminal de contenedores, exponiendo en profundidad el problema de localización de contenedores. También se proponen distintos algoritmos con los que resolver este problema. A través de los métodos propuestos se busca obtener soluciones que minimicen los tiempos necesarios para la ubicación de contenedores. Por último, se realiza una serie de experimentos computacionales para evaluar la eficiencia de estos algoritmos[EN] Maritime transport assumes a fundamental role worldwide in trade and its volume grows year after year. This increase in trade flows means that ports have to face increasing levels of work.In order to improve the productivity of the terminals and to face a workload that is progressively increasing, the terminals are looking for alternatives that help them to be more competitive and productive. A common way to achieve better performance is to design methods capable of optimizing the activities carried out within the port. One of these activities, the location of containers, is capable of significantly improving the entire chain of activities if properly managed. Through this work, an overview of the ports and the main operations and infrastructures of a container terminal is offered, exposing in depth the problem of container location. Different algorithms with which to solve this problem are also proposed. Through the proposed methods, we seek to obtain solutions that minimize the time necessary for the location of containers. Finally, a series of computational experiments are performed to evaluate the efficiency of these algorithms[CA] El transport marítim assumeix un paper fonamental a nivell mundial en el comerç i el seu volum creix any rere any. Aquest augment dels fluxos de comerç provoca que els ports hagen de fer front a uns nivells de treball cada vegada majors. Amb la finalitat de millorar la productivitat de les terminals i per a fer front a una càrrega de treball que augmenta progressivament, les terminals busquen alternatives que els ajuden a ser més competitives i productives. Una forma habitual d’aconseguir uns millors rendiments consisteix a dissenyar mètodes capaços d’optimitzar les activitats que es realitzen dins del port. Una d’aquestes activitats, la localització de contenidors, és capaç de millorar notablement tota la cadena d’activitats si es gestiona adequadament. Mitjançant aquest treball, s’ofereix una visió de conjunt dels ports i de les principals operacions i infraestructures d’una terminal de contenidors, exposant en profunditat el problema de localització de contenidors. També es proposen diferents algorismes amb els quals resoldre aquest problema. A través dels mètodes proposats es busca obtindre solucions que minimitzen els temps necessaris per a la ubicació de contenidors. Finalment, es realitza una sèrie d’experiments computacionals per a avaluar l’eficiència d’aquests algorismesFelíu Escagüés, J. (2020). Operaciones de localización de contenedores: desarrollo de métodos para problemas de localización de contenedores en terminales portuarias. http://hdl.handle.net/10251/149259TFG

Multikonferenz Wirtschaftsinformatik (MKWI) 2016: Technische Universität Ilmenau, 09. - 11. März 2016; Band I

Übersicht der Teilkonferenzen Band I: • 11. Konferenz Mobilität und Digitalisierung (MMS 2016) • Automated Process und Service Management • Business Intelligence, Analytics und Big Data • Computational Mobility, Transportation and Logistics • CSCW & Social Computing • Cyber-Physische Systeme und digitale Wertschöpfungsnetzwerke • Digitalisierung und Privacy • e-Commerce und e-Business • E-Government – Informations- und Kommunikationstechnologien im öffentlichen Sektor • E-Learning und Lern-Service-Engineering – Entwicklung, Einsatz und Evaluation technikgestützter Lehr-/Lernprozess

Factors Influencing Customer Satisfaction towards E-shopping in Malaysia

Online shopping or e-shopping has changed the world of business and quite a few people have decided to work with these features. What their primary concerns precisely and the responses from the globalisation are the competency of incorporation while doing their businesses. E-shopping has also increased substantially in Malaysia in recent years. The rapid increase in the e-commerce industry in Malaysia has created the demand to emphasize on how to increase customer satisfaction while operating in the e-retailing environment. It is very important that customers are satisfied with the website, or else, they would not return. Therefore, a crucial fact to look into is that companies must ensure that their customers are satisfied with their purchases that are really essential from the ecommerce’s point of view. With is in mind, this study aimed at investigating customer satisfaction towards e-shopping in Malaysia. A total of 400 questionnaires were distributed among students randomly selected from various public and private universities located within Klang valley area. Total 369 questionnaires were returned, out of which 341 questionnaires were found usable for further analysis. Finally, SEM was employed to test the hypotheses. This study found that customer satisfaction towards e-shopping in Malaysia is to a great extent influenced by ease of use, trust, design of the website, online security and e-service quality. Finally, recommendations and future study direction is provided. Keywords: E-shopping, Customer satisfaction, Trust, Online security, E-service quality, Malaysia

Metodología de implantación de modelos de gestión de la información dentro de los sistemas de planificación de recursos empresariales. Aplicación en la pequeña y mediana empresa

La Siguiente Generación de Sistemas de Fabricación (SGSF) trata de dar respuesta a los requerimientos de los nuevos modelos de empresas, en contextos de inteligencia, agilidad y adaptabilidad en un entono global y virtual. La Planificación de Recursos Empresariales (ERP) con soportes de gestión del producto (PDM) y el ciclo de vida del producto (PLM) proporciona soluciones de gestión empresarial sobre la base de un uso coherente de tecnologías de la información para la implantación en sistemas CIM (Computer-Integrated Manufacturing), con un alto grado de adaptabilidad a la estnictura organizativa deseada. En general, esta implementación se lleva desarrollando hace tiempo en grandes empresas, siendo menor (casi nula) su extensión a PYMEs. La presente Tesis Doctoral, define y desarrolla una nueva metodología de implementación pan la generación automática de la información en los procesos de negocio que se verifican en empresas con requerimientos adaptados a las necesidades de la SGSF, dentro de los sistemas de gestión de los recursos empresariales (ERP), atendiendo a la influencia del factor humano. La validez del modelo teórico de la metodología mencionada se ha comprobado al implementarlo en una empresa del tipo PYME, del sector de Ingeniería. Para el establecimiento del Estado del Arte de este tema se ha diseñado y aplicado una metodología específica basada en el ciclo de mejora continua de Shewhart/Deming, aplicando las herramientas de búsqueda y análisis bibliográfico disponibles en la red con acceso a las correspondientes bases de datos

Assuming Data Integrity and Empirical Evidence to The Contrary

Background: Not all respondents to surveys apply their minds or understand the posed questions, and as such provide answers which lack coherence, and this threatens the integrity of the research. Casual inspection and limited research of the 10-item Big Five Inventory (BFI-10), included in the dataset of the World Values Survey (WVS), suggested that random responses may be common. Objective: To specify the percentage of cases in the BRI-10 which include incoherent or contradictory responses and to test the extent to which the removal of these cases will improve the quality of the dataset. Method: The WVS data on the BFI-10, measuring the Big Five Personality (B5P), in South Africa (N=3 531), was used. Incoherent or contradictory responses were removed. Then the cases from the cleaned-up dataset were analysed for their theoretical validity. Results: Only 1 612 (45.7%) cases were identified as not including incoherent or contradictory responses. The cleaned-up data did not mirror the B5P- structure, as was envisaged. The test for common method bias was negative. Conclusion: In most cases the responses were incoherent. Cleaning up the data did not improve the psychometric properties of the BFI-10. This raises concerns about the quality of the WVS data, the BFI-10, and the universality of B5P-theory. Given these results, it would be unwise to use the BFI-10 in South Africa. Researchers are alerted to do a proper assessment of the psychometric properties of instruments before they use it, particularly in a cross-cultural setting

Leading Towards Voice and Innovation: The Role of Psychological Contract

Background: Empirical evidence generally suggests that psychological contract breach (PCB) leads to negative outcomes. However, some literature argues that, occasionally, PCB leads to positive outcomes. Aim: To empirically determine when these positive outcomes occur, focusing on the role of psychological contract (PC) and leadership style (LS), and outcomes such as employ voice (EV) and innovative work behaviour (IWB). Method: A cross-sectional survey design was adopted, using reputable questionnaires on PC, PCB, EV, IWB, and leadership styles. Correlation analyses were used to test direct links within the model, while regression analyses were used to test for the moderation effects. Results: Data with acceptable psychometric properties were collected from 11 organisations (N=620). The results revealed that PCB does not lead to substantial changes in IWB. PCB correlated positively with prohibitive EV, but did not influence promotive EV, which was a significant driver of IWB. Leadership styles were weak predictors of EV and IWB, and LS only partially moderated the PCB-EV relationship. Conclusion: PCB did not lead to positive outcomes. Neither did LS influencing the relationships between PCB and EV or IWB. Further, LS only partially influenced the relationships between variables, and not in a manner which positively influence IWB