Investigation of manufacturing techniques and prototyping of the Smartcities Citycar frame

Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2011.Cataloged from PDF version of thesis.Includes bibliographical references (p. 34).A study was performed to analyze different methods of manufacturing a full scale car frame for the Smart Cities Citycar, a folding electric vehicle being designed at the MIT Media Lab, as well as a half-scale prototype for testing driving and folding systems. Through looking at two case studies for similarly sized automobiles as well as analyzing the compatibility of metal casting, stamping, composite layup, and tube welding, it was resolved that the most effective method of manufacturing the full scale Citycar frame, in the future, will be through tube hydroforming because of the optimization of strength, stiffness, and cost. It is recommended that the planned half-scale prototype be produced using composite layup techniques as the facilities for heavy machinery operations are not readily available. There will be a foam mold created on which carbon fiber will be applied to create a strong, stiff, and light model that is useful for the future of the group in its testing and prototyping.by Arin S. Rogers.S.B

Authentic Leadership\u27s Ethical Influence on Retail Telecom Performance Management Systems

This qualitative study of retail telecommunication salespeople and their employers supported the existing literature about authentic leadership’s positive influence on organizational citizenship behavior, affective commitment, ethical climate, and employee motivation in balancing performance management systems. Through salesperson self-regulation, this study also supported goal setting and other task-based motivation theories. The study added to the paucity of research on the relationship of pressure to unethical behavior and found the time dimension of goals was less important than threatening pressure. Both ethical codes and personal values were found to motivate ethical behavior more than either one by itself. Also, the study found the store manager relationship was critical to salesperson motivation and performance which should be studied further, especially when dysfunctional, adding to leader membership exchange (LMX) constructs. Finally, more telecom salespeople were motivated relationally than financially, and their emotional depletion was more related to negative interpersonal interactions than task-based effort as reflected in expectancy-value theory. This requires further study. The study incorporated a philosophical assumption of a Biblical worldview

Introduction to The Special Issue: Advances in Methods and Measurement in Family Psychology

This special issue presents a collection of reports that highlight recent advances in methods and measurement and also shed light on the complexity of family psychology. The importance of theory in guiding solid family science is evident throughout these reports. The reports include guides for researchers who incorporate direct observation into their research protocols and the ever-expanding field of tele-health interventions. Advanced analytic approaches are offered in the areas of grid sequence analysis, latent fixed-effects models, and the Factors of Curves Model (FOCUS). These sophisticated analytic approaches may be applied to advance systemic thinking in family psychology. The last set of articles illustrate how complex and innovative methodologies are applied to address important societal issues. Work experiences and marital relationships in African American couples address the importance of spillover effects in contemporary families. The creation of biobehavioral plasticity index has the potential to inform gene x environment contributions to family functioning. Finally, the unique methodological issues that are particularly germane to the diverse nature of stepfamilies and nonresident fathers are addressed. We hope that readers of this special issue will return to these reports as resources and examples of theory-driven methods and measurements

A bargaining procedure leading to the serial rule in games with veto players

This paper studies an allocation procedure for coalitional games with veto players. The procedure is similar to the one presented by Arin and Feltkamp (J Math Econ 43:855-870, 2007), which is based on Dagan et al. (Games Econ Behav 18:55-72, 1997). A distinguished player makes a proposal that the remaining players must accept or reject, and conflict is solved bilaterally between the rejector and the proposer. We allow the proposer to make sequential proposals over several periods. If responders are myopic maximizers (i.e. consider each period in isolation), the only equilibrium outcome is the serial rule of Arin and Feltkamp (Eur J Oper Res 216:208-213, 2012) regardless of the order of moves. If all players are fully rational, the serial rule still arises as the unique subgame perfect equilibrium outcome if the order of moves is such that stronger players respond to the proposal after weaker ones

Creatinine, diet, micronutrients, and arsenic methylation in West Bengal, India.

BackgroundIngested inorganic arsenic (InAs) is methylated to monomethylated (MMA) and dimethylated metabolites (DMA). Methylation may have an important role in arsenic toxicity, because the monomethylated trivalent metabolite [MMA(III)] is highly toxic.ObjectivesWe assessed the relationship of creatinine and nutrition--using dietary intake and blood concentrations of micronutrients--with arsenic metabolism, as reflected in the proportions of InAS, MMA, and DMA in urine, in the first study that incorporated both dietary and micronutrient data.MethodsWe studied methylation patterns and nutritional factors in 405 persons who were selected from a cross-sectional survey of 7,638 people in an arsenic-exposed population in West Bengal, India. We assessed associations of urine creatinine and nutritional factors (19 dietary intake variables and 16 blood micronutrients) with arsenic metabolites in urine.ResultsUrinary creatinine had the strongest relationship with overall arsenic methylation to DMA. Those with the highest urinary creatinine concentrations had 7.2% more arsenic as DMA compared with those with low creatinine (p < 0.001). Animal fat intake had the strongest relationship with MMA% (highest tertile animal fat intake had 2.3% more arsenic as MMA, p < 0.001). Low serum selenium and low folate were also associated with increased MMA%.ConclusionsUrine creatinine concentration was the strongest biological marker of arsenic methylation efficiency, and therefore should not be used to adjust for urine concentration in arsenic studies. The new finding that animal fat intake has a positive relationship with MMA% warrants further assessment in other studies. Increased MMA% was also associated, to a lesser extent, with low serum selenium and folate

Analisis Non Linier Tremor Vulkanik Gunungapi Raung Jawa Timur–Indonesia

Penelitian mengenai aktifitas tremor vulkanik gunung Raung yang terekam pada bulan Oktober 2012 telah dilakukan. Data yang digunakan pada penelitian ini yaitu data tremor vulkanik yang terekam pada tanggal 17 Oktober sampai 16 November 2012. Penelitian dimulai dengan seleksi event tremor vulkanik yang jelas. Selanjutnya dilakukan rekonstruksi diagram attraktor dari tremor vulkanik gunung Raung dengan menggunakan teorema delay embedding. Delay time untuk merekonstruksi diagram attraktor ditentukan dengan menggunakan Metode Mutual Information (MI) dan didapatkan delay time tremor vulkanik gunung Raung dalam range 0,08 s - 0,09s. Dimensi embedding ditentukan dengan menggunakan metode False Nearest Neighbour (FNN) dan didapatkan dimensi embedding tremor vulkanik gunung Raung dalam range 4-5. Dengan menggunakan delay time dan dimensi embedding yang didapatkan maka diagram attraktor dapat direkonstruksi. Dimensi fraktal dihitung dengan menggunakan metode dimensi korelasi dan didapatkan nilai dimensi fraktal tremor vulkanik gunung Raung berkisar 2,91 – 3,35. Nilai Lyapunov exponent tremor vulkanik gunung Raung didapatkan berkisar 0,016 – 0,030. Berdasarkan dimensi fraktal dan Lyapunov exponent tremor vulkanik gunungapi Raung bersifat kaotik

KEMENANGAN DONALD TRUMP SEBAGAI PRESIDEN AMERIKA SERIKAT KE-45 MELALUI ANALISIS KONSTRUKSI KLAUSA RELATIF BAHASA INGGRIS DAN BAHASA INDONESIA SECARA SEMANTIS

This research aims (1) to comprehend the relative construction of English and Indonesia language on some texts relating to Donald Trump is elected as the 45th President of USA in 2016 semantically, and (2) to describe the analysis of relative constructive clauses between English and Indonesia language semantically. The research method is descriptive qualitative. Meanwhile, method of collecting data is agih method and the techniques are substitution, expand, interuption, and mutation. Based on the texts relating to Donald Trump is elected as the President of USA in 2016, it is found that the analysis of relative constructive clause of English and Indonesia language is based on the use of conjunction. In Indonesia language texts, there is one conjuction, namely: “yang”, meanwhile in English language texts, there are five conjuctions, namely: “who, whom, which, whose, and that”. If it is viewed from its semantics adjacent, relative clause can be divided into two sections based on its orthographics, namely: (1) restrictive relative clause which refers to the explained antecedent or as the integral unity from antecedent and unmarked by comma, and (2) non-restrictive relative clause as the additional information from antecedent explained and marked by comma