SENSITIVITY ANALSIS OF PROCESS PARAMETERS CONSIDERING DIMENSIONAL ACCURACY AND RELATIVE DENSITY IN DIRECT ENERGY DEPOSITION WITH SUS316L POWDERS

Department of Mechanical EngineeringThis study aims to analyze fundamental parameters of the Direct Energy Deposition (DED) process on a single-track level, whereas previous studies typically used bulk models to directly investigate the effects of process parameters on final products. Grounded on the fact that a printed product is the horizontal and vertical aggregations of single tracks, the effect on width, height and relative density of the printed part is collected by input process parameters (laser power, powder feed rate and coaxial gas rate) on a divided scale across single track, multi-track and multi-layer. All specimens are printed on the fixed experimental setting of the DED machine (i.e., MX-600) of which powder and substrate are SUS316L. The significance of the input process parameters is statistically analyzed on the key output of each scale. Then, the optimal parameters for the final product are compared to the parameters derived from the bulk samples. The optimal parameters derived from bulk samples and multi-scale samples have the almost same values in terms of their influences on the variance of the target property, while the cost for printing the multi-scale samples decreases by about 83%. DED has recently emerged as a key tool in product manufacturing beyond mold repair in the metal 3D printing sector. However, due to the nature of the DED process, it is difficult to apply it as an industry in terms of cost by using high-volume metal powder and high-power laser source. In this sense, this research is expected to benefit for industrial applications of the DED process through its optimization using single-track sampling.clos

Approximategeneralized Jensen typemappings in proper Lie CQ*-algebras

In this paper, we investigate the stability problems for proper Lie derivations associated to the generalized Jensen typefunctional equation in a proper Lie CQ*-algebra

A FIXED POINT APPROACH TO THE STABILITY OF GENERAL QUADRATIC EULER-LAGRANGE FUNCTIONAL EQUATIONS IN INTUITIONISTIC FUZZY SPACES

In this paper, we prove the generalized Hyers-Ulam stability of a general k-quadratic Euler-Lagrange functional equation:for any fixed positive integer in intuitionistic fuzzy normed spaces using a fixed point method

On The Stability Problem of Quadratic Functional Equations in 2-Banach Spaces

In this paper, we investigate the stability problem in the spirit of Hyers-Ulam, Rassias and Gavruta for the quadratic functional equation: f(2x + y) + f(2x - y) = 2f(x + y) + 2f(x - y) + 4f(x) - 2f(y) in 2-Banach spaces. These results extend the generalized Hyers-Ulam stability results by the quadratic functional equation in normed spaces to 2-Banach spaces

Transgender in Africa: Invisible, inaccessible, or ignored?

Transgender people are an important key population for HIV risk globally, and several studies have found HIV prevalence rates in transgender populations that are significantly higher than those among other key populations such as men who have sex with men (MSM). There is a lack of research on transgender populations in Africa, and at present, there is almost no data available on HIV prevalence and risk among transgender people on the continent. It is possible that the invisibility of transgender people in epidemiological data from Africa is related to the criminalisation of same-sex behaviour in many countries and the subsequent fear of negative repercussions from participation in research. Alternatively, transgender people may be being overlooked in research due to confusion among researchers about how to ask questions about gender identity. It is also possible that transgender populations have simply been ignored in research to date. Without research on transgender-specific HIV prevalenceand risk, it is very difficult to know what interventions and services are needed for this risk population. Therefore, it is important that researchers, governments, Non Governmental Organisations (NGOs) and donor organisations begin to pay explicit attention to transgender people in their HIV-related research and programmes in Africa

Continuity of retail therapy of fashion product shopping - A daily diary analysis -

Since the late 2000s, healing which is comforts and heals the tiredness has been emerging as a consumer trend, from economic recession and social relationships. This is emerging through consumers’ attitudes about their present happiness. Previous studies have explained that consumers can feel better through shopping, and introduced concepts such as \u27Retail Therapy\u27 or \u27Therapy Shopping\u27. This study analyzes the participants’ diary for a week to find the mechanism of retail therapy effect and continuity

Synchrony and Diachrony of Conversion in English

Conversion is one of the very productive means of forming new words in English morphology. It is a derivational process that includes no overt marking; i.e. there is no difference in the form even though the lexical category of the word has changed from one class to another. The main goal of this thesis is to provide a critical and informative analysis of conversion in English throughout distinct time periods and try to explain the problems that are left unanswered regarding this topic. There are two main approaches that are going to be presented in this research, such as synchronic analysis on conversion in the first part, and then a historical perspective will be examined in the second part of the research. For the synchronic analysis, in addition to representing the types of conversion in Present-Day English in greater detail, many controversial questions raised on conversion in English will be thoroughly investigated with numerous examples explicated; there are four main problems that are raised in this linguistic field, namely the problem of directionality, the problem of definition of conversion, syntactic approach of conversion, and the issue of productivity. The purpose of this part of study is to outline a number of different linguistic theories that has been proposed on conversion. In addition to this, a historical perspective of conversion in English will be examined as a diachronic approach of analysis. The word formation process of conversion has been present for centuries in the language (Biese 1942). Little attention has been drawn on conversion historically. Apart from the fact that there have not been many studies in this linguistic area, the purposes of this diachronic study are to deliver instructive, unified and meticulous descriptions on conversion with a great deal of comprehensive historical exemplifications and also to be able to trace, with confidence, the practicable and more reliable explanations to the essential questions that arise. I will divide this part into four sub-sections, namely conversion in Old English, conversion in Middle English, and conversion in Early Modern English, and manipulate the instances of conversion in each period and find out how the morphological process; i.e. conversion, evolved which hopefully shed insights on rather practical and explicative answers to the problems of conversion