Inovative Design of Mattress by Using TRIZ and QFD

Abstract–At this time the need for the design of a product is increased. Mattress is a necessity for every individual to rest. Preliminary studies of the function of the mattress stated that the use of the existing mattress found complaints (too large 72%, less attractive 40%, 80% less flexible, less comfortable 40%). Therefore, multifunctional mattress is needed. The purpose of this study is to propose a multifunctional design for a mattress. TRIZ method is used to determine the inventive principles of each attribute and QFD method is used to determine the design parameters of the mattress. Functions that can be developed from a mattress are that it can be folded, it can be a sofa / seating, into the table, flexible /easily removable and as the ironing board. The results of this study shows that the multifunctional mattress design was satisfied the customer feeling and emotion. Keyword–Mattress, TRIZ, QFD, Multifaction, Desig

Analisis Kelayakan Pembukaan Cabang Laboratorium Klinik Kesehatan Patra Medica di Kabupaten Boyolali

Boyolali is one of a large city in central Java of Indonesia which its population increases annually by 31%. This city has several health clinic includes antenatal clinics, general clinic and a clinical laboratory. Currently the numbers of clinics to service people are 77 clinics only. In fact, this district still requires on the other of 318 clinics that have an adequate qualification. Therefore it is crucial to establish some new clinics for satisfying the specified requirements by the district government. The purpose of this study is to analyze the feasibility of establishing a new clinical laboratory as an expansion of the existing clinic based on aspects of market, technics and technology, management, financial, legal and environment. Survey was conducted by distributing questioner and interview to a potential stakeholder. Non parametric statistical analysis is done to test some hypotheses at 5% of significant level and 10% of margin of error. The result of this study shows that the establishment of clinic laboratory in Boyolali is feasible according to an analysis of whole aspects

E-Airs: Interactive Ergonomic Monitoring System for Work Posture

Work posture and/or position of work is a crucial problem in work system. Unnatural posture will lead to discomfort when doing the task such as pain at part of body such that it will cause accident in the end. This accident will affect level of work performance of the worker so as the work productivity fails achieve a target determined. The failure mode, of course, results in a big loss for a company. This state should be avoided by use of the natural posture by worker in completing a job. However, many workers do not still understand what kind of a natural and unnatural work posture directly. So, this condition has high risk for being occurred the discomfort. Thus, it is important to develop a tool for helping them to identify a certain posture of work. Objective of this study is to design a monitoring system devices to capture and to determine an natural posture of the worker based on ergonomic principles. Rapid Upper Limb Assessment method is applied to determine a risk of work posture. Machine Learning concept is implemented to support in designing a system by also applying python programming language. Result of this study shows that monitoring system devices developed is usable in informing an unnatural posture of worker in completing a job. Thus, this result will beneficial for worker to improve work posture to be natural position so as discomfort can be prevented

A Comparative Analysis of Mental Workload between Train and Bus Drivers

Human error is one of the crucial problems in land transport, sea transport, and air transport that inflicting some undesirable occurrence such as delay, cancellation, or accident. This incident causes inconvenience and apprehension for passengers. Hence, drivers should avoid some errors in driving by improving alertness and reducing the excessive workload. This study presents a comparative study about mental workload between train and bus drivers based on subjective and objective criteria. NASA-TLX method is used to measure subjective variables by distributing questionnaires. While the content of a drivers’ Salivary α-amylase (SAA) is measured as an objective parameter before and after driving. 30 drivers are participated in this study who have experience for more than 3 years. Statistical analysis is conducted to test the hypothesis for a difference. The result of this study shows that bus drivers’ SAA level is significantly higher (Asymp. Sig. 0.49) than train drivers for both before (91.99 kU/l) and after (83.19 kU/l) driving activity. Similarly, weighted workload subjectively of bus drivers’ mental workload (1051) is higher than train drivers (1031) insignificantly (Asymp. Sig. 0.561)

Axiomatic Design Principles in Analysing the Ergonomics Design Parameter of a Virtual Environment

One of the negative side effects experienced by users when interacting with virtual environment is visual symptoms. This paper explores the ergonomics design parameters of the virtual environment to minimize such negative side effect by applying axiomatic design principles. Axiomatic design is a method to provide a systematic way for designing products and large systems. The independence axiom is used to map customer domain (CAs) to functional domain (FRs) and physical domain (DPs). A paper based survey was conducted to identify and define customers' preference in the virtual environment. A virtual robot manufacturing system was developed as a case study to explore ergonomic design parameters that satisfy the independence of FRs and CAs. Results of this study shows that the ergonomic design parameters of virtual environment identified (DP161-DP162-DP121-DP111-DP131-DP141-DP151-DP152) have satisfied the independence functional requirement and desired visual comfort for users. By uncoupling the design it provides an efficient and effective sequence of design activities FR161-FR162-FR121-FR111-FR131-FR141-FR151-FR152

Color preference of the Malay population in the design of a virtual environment

One of factors contributing to the incidence of cyber sickness in a virtual environment is color. This paper describes an investigation of the color preference in a virtual environment of the Malay population. A survey was conducted on the color preference of the , virtual static object and motion object. 64 subjects, (N = 34 male and N = 30 female, age between 17 to 50 years old), participated in the survey. Participants were asked to choose their 10 favorite single color for the virtual background color, virtual static and motion object color. Two tailed Z-test was conducted to test the difference between male and female color preference. The results show that red and medium slate blue colors are the most preferred colors for the virtual background by both, male and female. Red, blue, and deep pink colors are the most preferred colors for the virtual static object for both, male and female. And red and black colors are the most preferred colors by both, male and female, for virtual motion object