scholarly journals Development of a Virtual Fit Analysis Method for an Ergonomic Design of Pilot Oxygen Mask

2021 ◽  
Vol 11 (12) ◽  
pp. 5332
Author(s):  
Wonsup Lee ◽  
Daehan Jung ◽  
Seikwon Park ◽  
Heeeun Kim ◽  
Heecheon You

In the ergonomic design of wearable products such as an oxygen mask, systematic design methods including the analysis of anthropometric information, evaluation of fit, and product design need to utilize 3D human scan data. The present study intends to develop a virtual fit analysis method that generates an ergonomic shape of an oxygen mask for fighter pilots based on 3D facial scans. The proposed virtual fit analysis method enables iteratively to revise the shape of an oxygen mask until an appropriate level of fit between the mask and a group of pilot faces is achieved. The proposed method of virtual fit analysis and design optimization was applied to find ergonomic shapes of oxygen masks for four size categories (small narrow, medium narrow, medium wide, and large wide) to accommodate 336 pilots of the Republic of Korea Air Force. The virtual fit analysis results in the study showed that the revised oxygen mask shapes achieved significantly higher accommodation percentages (4.8~88.7%) at facial areas (nasal root, nasal side, cheek, and chin) compared to the existing oxygen mask shapes. The proposed method can be applied to develop an ergonomic product design that fits the face and other human body parts.

2018 ◽  
Vol 3 (1) ◽  
pp. 18-25
Author(s):  
HENDAR HENDAR ◽  
BUNGA GALUH ANDRETTA TRISNANDI

The purposes of this research are to find out the types of politeness strategies used to save the face of the characters in Once Upon A Time season 1 and to identify the dominant scale of social dimensions when using politeness strategies in Once Upon A Time season 1. This research uses qualitative-descriptive analysis method and to get the data needed in this research the writer did the following steps: watching the movies, transcribing the speech, searching the data, classifying the data, analyzing the data and drawing a conclusion related to the types of politeness strategies and the dominant scale of social dimensions. The source of the data used is taken from the serial film Once Upon A Time season 1 by Edward Kitsis dan Adam Horowitz. The results of this research show that there are four types of politeness strategies found in the serial film Once Upon A Time season 1. They are 10 data of bald on-record (28,6%), 8 data of positive politeness strategies (22,9%), 13 data of negative politeness strategies (37,1%) and 4 data of off-record consists (11,4%) and the most dominant scale of four social dimension scales is social distance scale 14 data (40%).


2019 ◽  
Vol 2019 ◽  
pp. 1-15
Author(s):  
Sen Mao ◽  
Changchuan Xie ◽  
Lan Yang ◽  
Chao Yang

A morphing trailing-edge (TE) wing is an important morphing mode in aircraft design. In order to explore the static aeroelastic characteristics of a morphing TE wing, an efficient and feasible method for static aeroelastic analysis has been developed in this paper. A geometrically exact vortex lattice method (VLM) is applied to calculate the aerodynamic forces. Firstly, a typical model of a morphing TE wing is chosen and built which has an active morphing trailing edge driven by a piezoelectric patch. Then, the paper carries out the static aeroelastic analysis of the morphing TE wing and corresponding simulations were carried out. Finally, the analysis results are compared with those of a traditional wing with a rigid trailing edge using the traditional linearized VLM. The results indicate that the geometrically exact VLM can better describe the aerodynamic nonlinearity of a morphing TE wing in consideration of geometrical deformation in aeroelastic analysis. Moreover, out of consideration of the angle of attack, the deflection angle of the trailing edge, among others, the wing system does not show divergence but bifurcation. Consequently, the aeroelastic analysis method proposed in this paper is more applicable to the analysis and design of a morphing TE wing.


Author(s):  
Nooreddine Iskandar ◽  
Tatiana Rahbany ◽  
Ali Shokor

Abstract Background: Due to the common instability caused by political and security issues, Lebanese hospitals have experienced acts of terrorism multiple times. The most recent Beirut Explosion even forced several hospitals to cease operations for the first time in decades—but studies show the preparedness levels for such attacks in similar countries are low. Objective: The aim of this study is to explore the experience of Lebanese hospitals with terrorist attacks. Methods: This qualitative study used semi-structured interviews with various stakeholders to assess their experience with terrorist bombings. Data was analyzed using the thematic analysis method. Results: The researchers found that Lebanese hospitals vary greatly in their structures and procedures. Those differences are a function of 3 contextual factors: location, culture, and accreditation status. Hospitals found near ‘dangerous zones’ were more likely to be aware and to have better response to such events. A severe lack of communication, unity of command, and collaboration between stakeholders has made the process fragmented. Conclusion: The researchers recommend a larger role for the Ministry of Public Health (MOPH) in this process, and the creation of a platform where Lebanese organizations can share their experiences to improve preparedness and resilience of the Lebanese healthcare system in the face of terrorism.


Author(s):  
Laura Mora ◽  
Anna Sedda ◽  
Teresa Esteban ◽  
Gianna Cocchini

AbstractThe representation of the metrics of the hands is distorted, but is susceptible to malleability due to expert dexterity (magicians) and long-term tool use (baseball players). However, it remains unclear whether modulation leads to a stable representation of the hand that is adopted in every circumstance, or whether the modulation is closely linked to the spatial context where the expertise occurs. To this aim, a group of 10 experienced Sign Language (SL) interpreters were recruited to study the selective influence of expertise and space localisation in the metric representation of hands. Experiment 1 explored differences in hands’ size representation between the SL interpreters and 10 age-matched controls in near-reaching (Condition 1) and far-reaching space (Condition 2), using the localisation task. SL interpreters presented reduced hand size in near-reaching condition, with characteristic underestimation of finger lengths, and reduced overestimation of hands and wrists widths in comparison with controls. This difference was lost in far-reaching space, confirming the effect of expertise on hand representations is closely linked to the spatial context where an action is performed. As SL interpreters are also experts in the use of their face with communication purposes, the effects of expertise in the metrics of the face were also studied (Experiment 2). SL interpreters were more accurate than controls, with overall reduction of width overestimation. Overall, expertise modifies the representation of relevant body parts in a specific and context-dependent manner. Hence, different representations of the same body part can coexist simultaneously.


2005 ◽  
Vol 13 (3) ◽  
pp. 379-394 ◽  
Author(s):  
ERIK JAN ZÜRCHER

The Republic of Turkey was founded in 1923. In the first 20 years of its existence, the political leadership of the republic embarked on a process of nation building in Anatolia and at the same time changed the face of Turkish society, stamping on it a particular brand of secular modernity. This article tries to find out what were the common characteristics of the small band of men who made up the leadership of the republic and to what extent their shared background and experience can help explain the course they charted for Turkey after its creation. One of the conclusions is that Turkey, although located geographically for more than 90% in Asia, is in fact a creation of Europeans, who shaped the country after their own image.


2021 ◽  
Vol 3(164) ◽  
pp. 143-165
Author(s):  
Piotr Stanisz

The purpose of the present study is to analyse the restrictions on the freedom of religious worship introduced by the Polish executive authorities in the face of the spreading COVID-19 epidemic. The analysis aims to answer questions not only concerning the conformity of these actions with the Constitution of the Republic of Poland and statutory laws, but also pertaining to the issue of the level of preparation of Polish law for an epidemic. In reference to these questions, the author concludes that the introduction of restrictions on the freedom to manifest religion by acts of worship in the regulations issued by the Minister of Health and the Council of Ministers exceeds the bounds of statutory authorisation and is inconsistent with the Polish Constitution. According to the Constitution of the Republic of Poland, passing a law remains the only admissible way of introducing restrictions on the freedom of manifestation of religion, and there are no exceptions to this rule even in states of emergency. On the other hand, the author also points out that if the effectiveness of combating this kind of epidemic really depends on possibility of introducing the above-mentioned restrictions without a long legislative process, it means that Polish executive authorities have been confronted by the constitutional legislator and the legislature with a choice between being efficient and acting in conformity with the Constitution and statutory laws. Therefore, the article postulates that it is necessary to make deep changes to the current law. Elaborating a broad concept of these changes requires further analysis, and the relevant discussion needs to take into account the experience gained so far in combating the coronavirus epidemic, the importance of freedom of thought, conscience and religion, and the solutions adopted in other countries. A clear and balanced, as well as properly sequenced and democratically justified specification of the rules that should be followed by the executive when introducing restrictions related to the spread of the epidemic, even with regard to such important values as the freedom to manifest religion through acts of worship, is undoubtedly more appropriate than formally ruling out the possibility of taking action that may turn out necessary in the future.


2021 ◽  
Vol 13 (3) ◽  
pp. 224-232
Author(s):  
Valentina P. Grishunina ◽  
Natalia I. Yershova

Introduction. The article describes phraseological synonyms in Russian and Moksha subdialects on the territory of Mordovia. The subject of the analysis is the specific features of dialect phraseological units. The purpose of the study is to present a comprehensive description of the phenomenon of synonymy of phraseological turns in the considered subdialects. Materials and Methods. To achieve this goal, it employs various research methods, the main of which is descriptive one. In addition, it uses the elements of distributive and component analysis method. The language material was made up of phraseological units extracted by continuous sampling from the “Dictionary of Russian subdialects on the territory of the Republic of Mordovia”, Moksha-Russian dictionaries and field observations of the authors. Results and Discussion. As a result of the analytical review of the material, it is identified that in the phraseological units of both the Russian and Moksha languages develop synonymous series covered by the phenomenon of variance. The emergence of synonymous series is primarily associated with the renewal of the figurative basis of phraseological units belonging to the same topic. In the process of synonymous development of phraseological units, there is a search for a better image and linguistic means of constructing it while maintaining the unity of the logical side of the concept underlying it. Conclusion. The article is of practical importance, its results can be used in writing teaching handbooks on Russian dialectology, in teaching the course “Russian dialectology”, “Dialectology of the Moksha language” and corresponding courses for students majoring in Arts and Humanities.


2013 ◽  
Vol 4 (10) ◽  
pp. 311-316
Author(s):  
Kutsanedzie F. ◽  
Mensah E. .

The Polytechnics in Ghana were established and given the mandate enshrined in the Constitution of Ghana under the Act of Parliament of the Republic of Ghana (Act 745) to train students in the fields of Science, Technology, Applied Social Science and Applied Art to serve the middle-manpower management needs of the country. In addition, the polytechnics are to provide skills development, conduct and publish industry driven research findings. Polytechnic graduate are expected by employers and captains of industry to be more practical-skilled and biased by virtue of their training. However, over the years, it appears the polytechnic graduate training is becoming more of theoretical rather than what was initially intended. Commentaries of stakeholders reveal that the polytechnics are gradually losing their focus vis-à-vis the practical training of students as they are fast comparing themselves to the universities. This paper uses observation of the polytechnics educational system, interviews with stakeholders and other secondary data as the bases to critically examine and identify the conditions that hamper the practical training of the polytechnic students – practical content of syllabi; teacher – student ratio in the face of high student intake; qualification of lecturers in terms of practical training. It thus recommends ways by which the polytechnics can improve upon the practical training of its student via mobilizing and utilizing its resources to create industries to facilitate the training of its students as well as reducing graduate unemployment. This thus will serve as lynch-pin to drive the country’s industrialization process.


Author(s):  
Irwan Sukendar ◽  
Bustanul Arifin ◽  
Faathir Sukron Addin

The making of Indonesian soccer robot in the division of the Indonesian Football Robot Contest (KRSBI) especially in the process of coil rolling machines on a solenoid does not pay attention to ergonomic factors. The process of winding the wire on the solenoid is done using only the hands manually and in an un ergonomic body position, which is turning and bending. As a result, the convolution process lasts longer and in the wrong posture, causing fatigue and back pain. Macroergonomic Analysis and Design (MEAD) and Rapid Entire Body Assessment (REBA) approaches are used to analyze the posture of the wire. The solution is obtained by design and making an ergonomic and semi-automatic coil rolling machines to solenoid Robot based on the Arduino Microcontroller


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