Aramanızda 1525 sonuç bulundu.

Tez notu: ABSTRACT Dıe eingereiche Dıssertatıon tragt den Tıtel ,,OPEX in Wonhungsunternehmen – Chancen und Grenzen der Anwendbarkeit ‘’. Dıe Ausgangssituation fur diese Arbeit ist der Mangel an Studien zu Operational Excellencxe Initıative in deutschen Wohnungsunternehmen. Durch die hohe Bedeutung der immobilienwirtschaft fur die gesamte Bruttowertschopfung in Deutschland ist es von existentieller Bedeutung, die Wettbewerbsfahigkeit der Wohnungsunternehmen zu erhalten. Alle Geschaftsprozesse musen auf die Bedurfnısse der Kundenş die Qualıtat der Dienstleistung und den effızıenten Einsatz der Ressourcen ausgerıchte sein. Die Untersuchung des Themas findet bie deutschen Wohnungsunternehmen statt, welche im GdW Bundesverbandes deutscher Wohnungs- und Immobilieununternehmen e.V. organisiert sind. Dabei weden der Implementierungsstand, d’e Schlusselfaktoren und die Hindernisse bie der Einfuhrung untersucht. Die fur die Untersunchung erforderlichen Daten werden durch eine Primardatenerhebung in Form einer Online Befragung gewonnen. Die Ergebnisse der Umfrage zeigen, dass sich ein grober Teil der GdW Wohnungsunternehmen nicht mit operational Excellence Initiativen beschaftigen, Die Anwendung von Operational Excellence Systemen findet nur in einigen Wohnungsunternehmen Beachtung und bietet groBes Potential zur Erhohung der Kundenzufriedenheit, Steigerung der Prozessqualitat, Senkung der Prozesskosten und Minimierung der Fehlerquote. Die Bedeutung des Forschungsvorhabens besteht darin Anwendbarkeit von operational Excellence Initiative in deutschen Wohungsunternehmen zu prufen und dabie die Chancen und Grenzen der Anwendbarkeit zu untersuchen. Die wird durch eine representative Umfrage mit anschlieBender detaillierter Auswertung der Ergebnisse erreicht. Schlagworter: Lean Management, Six Sigma, Lean Six Sigma, Operational Excellence, Wonhungswirtschaft, Immobilienwirtscaft.

Tez notu: ABSTRACT Leasing companies are trying to further develop their business models in order to remain competitive in the future. Customers are demanding hybrid offerings that combine products and services into a solution that suits them. Based on an empirical study, this paper contributes to new insights into hybrid business models in the leasing industry. The results show that about half of all leasing companies included in the analysis pursue hybrid business models. Above all, it becomes clear that leasing companies with a hybrid business model are more profitable. In addition, it can be shown that larger and manufacturer-dependent leasing companies are rather offering hybrid business models. At the same time, hybrid leasing companies have a more focused product portfolio. The derived recommendations for action can help leasing companies to successfully further develop their business models. Keywords: Hybrid business model, Leasing, Product-service system, Servitizatio

Tez notu: ABSTRACT The home environment, school environment, parents' attitudes, motivation towards second language learning, and teachers are some factors that can affect children's development in second language learning. Moreover, factors such as parents' supervision and children's support are essential during the learning development. This study aimed at exploring the influence of parental involvement in their children's second language learning. Parents of first-grade primary school pupils enrolled at private schools located in the Turkish Republic of Northern Cyprus (TRNC) took part of this study. In addition, 154 structured questionnaires were administered and retrieved to the participants. The research subsequently employed PLS-SEM for the structural model analysis study with the use of Smart PLS 3. The influence of income level, marital status, and parents' educational level was investigated through the use of multi-group analysis (MGA). The outcomes showed that parents' educational level significantly moderate the relationship between methods employed by parents and their sources of motivation in their children's second language learning stage. Finally, methods employed by the parents and their source of motivation influence the child second language learning, also a statistically significant relationship was found between the abovementioned variables. Keywords: Children's early second language learning, home environment, second language learning, PLS-SEM, parents' motivation.

Tez notu: ABSTRACT If leachate is directly discharged into the environment, it may have catastrophic effects on both the water and soil. In this study, lab tests were performed to compare the efficiency of several single and hybrid Advanced Oxidation Processes (AOPs) in treating landfill leachate in terms of Chemical Oxygen Demand removal percentage (COD RP) and Leachate Pollution Index (LPI). Ozone, H2O2, and Fenton process were optimized as single AOPs and then combined as hybrid techniques (Fenton/Ozone and H2O2/Ozone) in their optimized condition. The optimizations have been done in terms of COD RP. The results indicated that, for single applications: ozone has been optimized at pH 8.4 and 120 min contact time (CT); H2O2 has been optimized at pH 11 and 4 g L -1 dose and Fenton process has been optimized at pH 3.5, [H2O2]:[Fe+2] ratio = 4:1.4 g L-1 and 50 min contact time. All methods that have been tested are strongly dependent on the pH value of the treated medium. Along with testing of AOPs methods for LPI and COD removal efficiency, some other important parameters have been also measured including color, turbidity, TDS and EC. As for the hybrid systems; the combination of the Fenton process and Ozone was observed to be the most efficient method of the H2O2-based AOPs for COD removal and LPI reduction of the leachate. Keywords: AOPs; Leachate; H2O2; Peroxone process; Fenton process; Ozonation; hybrid techniques

Tez notu: ABSTRACT Stepped spillways are a typical configuration that are used for releasing water and floods from an embankment dam. The stepped chute helps to enhance the energy dissipation. Stepped spillways have been investigated for more than three decades and in more advanced studies the complex two-phase flow has been considered. In terms of energy dissipation, in the literature, the effect of the non-uniform stepped length has not been discussed comprehensively. Therefore, in this thesis, different type of stepped chute configurations, from uniform steps to completely random ones, have been investigated. With the help of InterFOAM and through volume-of-fluid method, the free surface air-water flow as well as flow turbulence were modeled numerically. In this study, to check the numerical simulations, five turbulence models were utilized. The turbulence models that were studied are: Standard k- ε, Realizable k- ε, RNG k- ε, Standard -k-ω and SST-k-ω model. To determine the type of the turbulence that is appropriate and efficient in a stepped spillway, the numerical results were validated. The results of the simulations were compared with experimental data available in the literature. The results indicated that among all the turbulence models, the realizable k- ε model is the most efficient model. The results indicated that the air entrainment increases if the step length increases. Moreover, in the investigated configurations, the air portion increased in the concave spillways, contrary to the convex ones and compared to uniform configurations, in term of aeration, the performance of random and semi-uniform configurations were not better. . In the interest of energy dissipation, among all the uniform configurations, the uniform stepped chute with a slope of 1V:2.2H had the best performance. Furthermore, for uniform stepped spillways, a new relationships between relative critical flow depth and relative energy dissipation was proposed. The results revealed that instead of increasing the horizontal face length, the semi-uniform stepped spillways can improve the energy dissipation significantly. Keywords: Stepped Spillway; InterFOAM; VOF; Turbulence Model; Skimming Flows.

Tez notu: Thesis