scholarly journals Constructional design of the body shape of large gear wheels

2021 ◽  
Vol 1199 (1) ◽  
pp. 012019
Author(s):  
S Sivák ◽  
S Maláková
Keyword(s):  
Body Shape ◽  
Gear Wheel ◽  
The Body ◽  
Spur Gears ◽  
Performance Parameters ◽  
Large Gear ◽  
The Subject ◽  
Body Shapes ◽  
Gear Wheels ◽  
Means Of Production

Abstract The development of modern machines and means of production is characterized by ever-increasing performance parameters with decreasing equipment weight. When designing large gears, it is also necessary to consider the influence of the body shape of the gear wheel. The body shape of gear wheel must meet the basic requirements of stiffness and strength with the lightest possible construction of the gear wheel body. The work is focused on large gears, made with relief. Such gears can be forged, cast, or made by welding. The shape of the gear wheel body depends on several factors such as the size of the wheel, the material, the method of manufacture or use. The paper provides an overview of the body shapes used by large spur gears. These body shapes of spur gears will be the subject of further research, where suitability will be assessed based on stiffness of teeth and wheel weight.

Body shapes and apparel fit for overweight and obese women in the US: the implications of current sizing system

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Eonyou Shin ◽  
Elahe Saeidi
Keyword(s):  
Body Shape ◽  
The Body ◽  
Whole Body ◽  
Body Measurements ◽  
Obese Women ◽  
Content Type ◽  
The Us ◽  
Sizing System ◽  
Body Shapes ◽  
Apparel Fit

PurposeThe purpose of this study was to categorize the whole body shapes of overweight and obese females in the US and examine apparel fit based on the current ASTM sizing standards related to the body shapes categorized.Design/methodology/approachBody scan data from 2,672 subjects were used. To categorize their whole body shapes using 97 body measurements, principal component analysis with varimax rotation, a hierarchical cluster analysis and K-means cluster analysis were used. To compare the ASTM sizing standards for plus sizes (curvy and straight) and missy sizes (curvy and straight), five body parts (bust, under bust, waist, top hip, hip) using the formula for fit tolerance (measurement plus half of the interval) were compared with the ASTM sizing standards to determine the size appropriate for each body part.FindingsFive whole body shapes among overweight and obese females in the US were categorized: Rectangle-curvy; parallelogram-moderately curvy; parallelogram-hip tilt; inverted trapezoid-moderately curvy and inverted trapezoid-hip tilt. When the body measurements in each body shape were compared with the current ASTM sizing systems for both misses and plus sizes, four-fifths or more of overweight and obese female adults in the US would find it difficult to obtain a perfect fit for both tops and bottoms.Originality/valueIdentifying whole body shapes among overweight and obese women in the US contributes significantly, as it will help apparel companies that target the markets of larger women develop a new sizing system. This study is the first attempt to analyze fit by comparing the ASTM sizing charts with body measurements in each body shape group. Further, the study contributes to the body-related literature by filling gaps in missing whole BS categories among overweight and obese females.

scholarly journals MODIFICATIONS OF GEAR WHEEL TEETH OF AVIATION GEARBOXES TO INCREASE THEIR OPERATIONAL RELIABILITY AND TECHNOLOGY

2021 ◽  
pp. 112-125
Author(s):  
O. Pilipenko ◽  
D. Kolesnik ◽  
A. Berezniak ◽  
R. Kholodnyi
Keyword(s):  
Contact Zone ◽  
Gear Wheel ◽  
Operational Reliability ◽  
Spur Gears ◽  
Operational Characteristics ◽  
Significant Difference ◽  
Different Types ◽  
Gear Wheels ◽  
Gear Drives ◽  
Radical Type

The types and methods of modifications of teeth and gear wheels, which have found application in gearboxes of aircraft and helicopters, are presented. Features of geometry, parameters of different types of initial produced contours, their modifications, application and influence of various factors on improving the operational characteristics of gear drives of aviation gearboxes are considered. Arcuate (short and long) and short linear options for modifying the tooth profiles of aircraft gearboxes are best suited to absorb the errors of spur gears. There was no significant difference in the use of short and long correction for a relative decrease in temperature in the contact zone of the wheel teeth, therefore, the use of any correction of the tooth profile, with rare exceptions, turns out to be useful. The advantages of using increased profile angles in comparison with the standard ones used in general mechanical engineering are considered. Development of designs of teeth and gear wheels in aircraft gearboxes, the use of gears with teeth of an asymmetric profile, which can be considered as a cardinal modification of the tooth profiles. The use of such gears increases the strength of the teeth due to the increase in the thickness of the teeth. Unsymmetrical teeth have a large thickness at the tip, which reduces teeth chipping and due to their greater height, greater smoothness of engagement is achieved, bending and contact stresses are reduced. The most radical type of modification is the use of asymmetric profiles of the teeth of the wheels of aircraft gearboxes.

scholarly journals Evolution of crabs – history and deconstruction of a prime example of convergence

2014 ◽  
Vol 83 (2) ◽  
pp. 87-105 ◽  
Author(s):  
Gerhard Scholtz
Keyword(s):  
Body Shape ◽  
Sea Urchins ◽  
The Body ◽  
External Factors ◽  
The Other ◽  
Compact Body ◽  
Body Shapes ◽  
Definition Of ◽  
Internal And External Factors

Compared with the elongate bodies of shrimps or lobsters, crabs are characterised by a compact body organisation with a depressed, short carapace and a ventrally folded pleon. The evolutionary transformation from a lobster-like crustacean towards a crab is called ‘carcinization’ and has been interpreted as a dramatic morphological change. Nevertheless, the crab-shape evolved convergently in a number of lineages within Decapoda. Accordingly, numerous hypotheses about internal and external factors have been presented, which all try to explain these frequent convergent carcinization events despite the seemingly fundamental changes in the body organisation. However, what a crab is lies greatly in the eye of the beholder and most of the hypotheses about the lobster/crab transformation are biased by untested assumptions. Furthermore, there are two meanings of the word ‘crab’ within decapods: one, the phylogenetic meaning, refers to the clade Brachyura; the other, more general and typological use of the word crab, describes decapods with a certain body shape. These two meanings should not be confused when the issue of carcinization is discussed. Here, I propose a definition of what a crab is, i.e. what is meant when we speak about carcinization. I show that not all Brachyura are crabs in the typological sense. Carcinization occurred at least twice within the clade. Among Anomala there is further evidence that crab-shaped Lithodidae derived from a hermit-crab like ancestor. Carcinization is not restricted to Anomala plus Brachyura (Meiura) but is also found in Achelata, namely in slipper lobsters. A deconstruction of the crab-shape reveals that parts of it appear in various combinations among all decapod groups. Only a certain threshold of number and quality of crab-features makes us call an animal a ‘crab’. This reveals that carcinization does not involve such dramatic changes in morphology as has been suggested. Moreover similar alterations of body shapes appear frequently in other crustacean taxa and in various animal groups as diverse as sharks and sea urchins. Hence morphological constraints, macroevolution, trends, tendencies, or underlying synapomorphies of any kind are not necessary assumptions for the explanation of the evolution of crabs.

scholarly journals Personalized 3D mannequin reconstruction based on 3D scanning

2018 ◽  
Vol 30 (2) ◽  
pp. 159-174 ◽  
Author(s):  
PengPeng Hu ◽  
Duan Li ◽  
Ge Wu ◽  
Taku Komura ◽  
Dongliang Zhang ◽  
...  
Keyword(s):  
Body Size ◽  
Human Body ◽  
Body Shape ◽  
3D Scanning ◽  
The Body ◽  
Shape Information ◽  
Apparel Manufacturing ◽  
Content Type ◽  
The Subject ◽  
Conventional Methods

PurposeCurrently, a common method of reconstructing mannequin is based on the body measurements or body features, which only preserve the body size lacking of the accurate body geometric shape information. However, the same human body measurement does not equal to the same body shape. This may result in an unfit garment for the target human body. The purpose of this paper is to propose a novel scanning-based pipeline to reconstruct the personalized mannequin, which preserves both body size and body shape information.Design/methodology/approachThe authors first capture the body of a subject via 3D scanning, and a statistical body model is fit to the scanned data. This results in a skinned articulated model of the subject. The scanned body is then adjusted to be pose-symmetric via linear blending skinning. The mannequin part is then extracted. Finally, a slice-based method is proposed to generate a shape-symmetric 3D mannequin.FindingsA personalized 3D mannequin can be reconstructed from the scanned body. Compared to conventional methods, the method can preserve both the size and shape of the original scanned body. The reconstructed mannequin can be imported directly into the apparel CAD software. The proposed method provides a step for digitizing the apparel manufacturing.Originality/valueCompared to the conventional methods, the main advantage of the authors’ system is that the authors can preserve both size and geometry of the original scanned body. The main contributions of this paper are as follows: decompose the process of the mannequin reconstruction into pose symmetry and shape symmetry; propose a novel scanning-based pipeline to reconstruct a 3D personalized mannequin; and present a slice-based method for the symmetrization of the 3D mesh.

Classification of body shape characteristics of women's torsos using angles

2010 ◽  
Vol 22 (4) ◽  
pp. 297-311 ◽  
Author(s):  
Wookyung Lee ◽  
Haruki Imaoka
Keyword(s):  
Body Shape ◽  
Three Dimensional ◽  
The Body ◽  
Data Set ◽  
Content Type ◽  
Body Sizes ◽  
Body Shapes ◽  
Three Body ◽  
Shape Characteristics

PurposeThe purpose of this paper is to classify body shapes using angular defects instead of sizes.Design/methodology/approachA large amount of dimensional data from a national anthropometry survey was analysed, and a basic pattern and its polyhedron were also used to create a three‐dimensional body shape from three body sizes. Using this method, the sizes were converted into nine angular defects.FindingsThe authors could define the factors explaining body shape characteristics and classify the body shapes into four groups. The four groups could be characterised by two pattern making difficulties of the upper and lower parts of the body as well as by two proportions, of waist girth to bust girth and bust girth to back length. Furthermore, depending on the age, the authors could understand body shape by the angle made.Originality/valueUsing a polyhedron model, the angles could be calculated using an enormous existing data set of sizes. An angular defect serves as an index to indicate the degree of difficulty for developing a flat pattern. If an angular defect of the bust is large, it is difficult to make a paper pattern of a bust dart. On the other hand, if an angular defect of the waist is large, it is easy to make a paper pattern of a waist dart. Thus, each body shape could be simultaneously characterized by two difficulty indices and two proportions of sizes.

scholarly journals Anthropometry and Size Groups in the Clothing Industry

2020 ◽  
Vol 20 (1) ◽  
pp. 56-62
Author(s):  
Monika Balach ◽  
Marzanna Lesiakowska-Jablonska ◽  
Iwona Frydrych
Keyword(s):  
Human Body ◽  
Human Population ◽  
Body Shape ◽  
Apparel Industry ◽  
The Body ◽  
Clothing Industry ◽  
Size Groups ◽  
Body Shapes ◽  
Modal Group

AbstractIt appears that from generation to generation the anthropometric dimensions of the human population are changing. The aim of this paper was to examine the extent of these changes and the need for generating updated measurements for the clothing industry. The clothing industry uses mannequins and avatars to represent the modal group of the population. The industry tends to use three different categories for the human body shape (endomorphic, mesomorphic, and ectomorphic). The clothing industry should focus on specific measurements of the body rather than general categories and create more body shapes to satisfy customer needs. The paper also aimed at showing the problems faced by clothing designers. The traditional way of measuring takes into account only selected dimensions of the human body; this does not reflect the “true” overall body shape. The dimension tables used by the apparel industry are based on the fourth anthropometric photograph taken between 1987 and 1989. These tables are still in the use currently; however, after 30 years they are outdated and should be revised for the young contemporary generation. This study can be used for the development of new dimension tables as well as defining methods aimed at improving the quality of measurements for clothing engineering purposes. This is an important issue, because the National Institute of Anthropometry does not deal with such problems (the measurements are conducted mainly for understanding the human body shape rather than any other application), which means that anthropometric measurements are not ideally suited to applications of clothes fitting.

scholarly journals MAKIAN BAHASA WAKATOBI DIALEK KALEDUPA (Invective Wakatobi Language Kaledupa Dialect)

Kandai ◽  
2020 ◽  
Vol 16 (1) ◽  
pp. 27
Author(s):  
NFN Susiati
Keyword(s):  
Qualitative Research ◽  
Body Shape ◽  
Research Data ◽  
The Body ◽  
Abstract Objects ◽  
Note Taking ◽  
Remote Areas ◽  
Observation Methods ◽  
The Subject ◽  
Participatory Observation

Penelitian ini bertujuan mendeskripsikan jenis makian bahasa Wakatobi dialek Kaledupa. Penelitian ini merupakan penelitian kualitatif. Data dikumpulkan menggunakan metode observasidengan teknik observasi partisipatif moderat, teknik rekam, dan teknik catat. Data dianalisis secara deskriptif sesuai dengan teori makianWijana. Hasil penelitian menunjukkan bahwa jenis makian bahasa Wakatobi dialek Kaledupa ada lima belas, yakni (1) makian yang bertalian dengan agama/kepercayaan; (2) makian yang bertalian dengan gaib; (3) makian yang bertalian dengan kelamin; (4) makian yang bertalian dengan bagian tubuh; (5) makian yang bertalian dengan fungsi tubuh; (6) makian yang bertalian dengan bentuk tubuh; (7) sinonim kata bodoh; (8) makian yang bertalian dengan nama binatang; (9) makian yang bertalian dengan nama orang dungu; (10) makian yang bertalian dengan kekerabatan; (11) makian yang bertalian dengan profesi rendah; (12) makian yang bertalian dengan suku/etnis; (13) makian yang bertalian dengan  asal daerah terpencil; (14) makian yang bertalian dengan benda abstrak; (15) makian yang bertalian pada penyakit yang menjangkiti subjek. Berbagai jenis makian tersebut ditemukan dalam bentuk piranti linguistik seperti kata, frasa, dan bentuk gramatikal.This study aimed to describe the inverse type of Wakatobi Kaledupa dialect. This research was a qualitative research. Data were collected using observation methods with moderate participatory observation techniques, recording techniques, and note taking techniques. Data were analyzed descriptively according to Wijana's. The results showed that there were fifteen types of Wakatobi language dialects in the dialect, namely (1) invective related to religion/belief; (2) invective related to unseen; (3) invective related to sex; (4) invective relating to parts of the body; (5) invective relating to bodily functions; (6) invective relating to body shape; (7) synonym for the word stupid; (8) invective relating to the name of the animal; (9) invective relating to the name of an ignorant person; (10) invective related to kinship; (11) invective relating to low professions; (12) invective related to ethnicity; (13) invective relating to the origin of remote areas; (14) invective relating to abstract objects; (15) invective related to a disease that affects the subject. Various types of invective are found in linguistic devices such as words, phrases, and grammatical forms. 

A Test of the Rapid Formation of Design Cues for Product Body Shapes and Features

2018 ◽  
Vol 140 (7) ◽  
Author(s):  
Ping Du ◽  
Erin F. MacDonald
Keyword(s):  
Visual Cues ◽  
Body Shape ◽  
Environmentally Friendly ◽  
The Body ◽  
General Idea ◽  
Visual Design ◽  
Mental Load ◽  
Environmental Friendliness ◽  
Body Shapes ◽  
Tracking Device

Consumers often use a product's visual design as a mental shortcut to judge its unobservable attributes. Mental associations between visual design and unobservable attributes aid consumers in their judgments, and hypothetically reduce consumers' mental load. This paper describes a study that shows the possibility of quickly creating an association in subjects' minds between a holistic visual cue of a product—its body shape—and the general idea of “environmentally friendly” versus “not environmentally friendly,” a typically unobservable attribute. In this study, products' actual environmental friendliness was not measured. Subjects completed an association-building task, in which they developed mental associations between a product's visual cues and its “environmental friendliness” rating, an arbitrarily predetermined rating the authors supplied. The body shape was successfully used as a cue to subliminally communicate to subjects the product's “environmental friendliness.” As a comparison, an individual feature of the product was also used to cue; however, that was unsuccessful. An eye-tracking device was used to identify where subjects were focusing their eyes and for how long. In both the association-building task and a testing task that followed, subjects spent a greater percentage of time looking at the product's cued areas (the body and the selected feature). But during the testing task, subjects spent an even higher percentage of their time looking at the cued areas than they did during the association-building task. This indicates that mental associations, or cues, work to distribute mental load more efficiently.

scholarly journals The Types Of Invective Wakatobi Language Kaledupa Dialect

2020 ◽  
Author(s):  
Susiati Susiati
Keyword(s):  
Qualitative Research ◽  
Body Shape ◽  
Research Data ◽  
The Body ◽  
Abstract Objects ◽  
Note Taking ◽  
Remote Areas ◽  
Observation Methods ◽  
The Subject ◽  
Participatory Observation

AbstractThis study aims to describe the inverse type of Wakatobi Kaledupa dialect. This research is a qualitative research. Data were collected using observation methods with moderate participatory observation techniques, recording techniques, and note taking techniques. Data were analyzed descriptively according to Wijana's.The results showed that there were fifteen types of Wakatobi language dialects in the dialect, namely (1) invective related to religion / belief; (2) invective related to unseen; (3) invective related to sex; (4) invective relating to parts of the body; (5) invective relating to bodily functions; (6) invective relating to body shape; (7) synonym for the word stupid; (8) invective relating to the name of the animal; (9) invective relating to the name of an ignorant person; (10) invective related to kinship; (11) invective relating to low professions; (12) invective related to ethnicity; (13) invective relating to the origin of remote areas; (14) invective relating to abstract objects; (15) invective related to a disease that affects the subject. Various types of invective are found in linguistic devices such as words, phrases, and grammatical forms.

Stratified body shape-driven sizing system via three-dimensional digital anthropometry for compression textiles of lower extremities

2017 ◽  
Vol 88 (18) ◽  
pp. 2055-2075 ◽  
Author(s):  
Rong Liu ◽  
Xia Guo ◽  
Qiujin Peng ◽  
Le Zhang ◽  
Terence T Lao ◽  
...  
Keyword(s):  
Body Shape ◽  
Three Dimensional ◽  
Lower Extremities ◽  
The Body ◽  
Lower Limbs ◽  
Sample Population ◽  
Shape Variation ◽  
Dynamic Interactions ◽  
Sizing System ◽  
Body Shapes

Poor fit has become one of reasons for high non-compliance in the use of garments made of compression textiles in venous deficiency treatments. A novel methodology to categorize lower body shapes and sizes has been established via three-dimensional digital anthropometric technology in this study based on 208 Hong Kong subjects aged 40–60 years. Three new parameters were introduced to classify body shapes, namely the “A-angle” for assessing the “alignment” of lower extremities, the “cosine values of the key angle” at the turning point for below-knee shape determination, and “gradient” for above-knee shape categories. The mathematical simulation via the interpolation function was employed to explore the characteristics of shape variation trends with the involvement of dynamic interactions of both circumferences ( Cir) and heights ( Hei) of lower extremities. The clustering analysis quantitatively segmented the sample population into three stratified leg morphologies (i.e. diamond, inverted trapezoid, and balanced leg shapes) in terms of the determined anthropometric landmarks along the lower extremities, in which the C ir( s) of the brachial ( cB1), calf ( cC), and thigh ( cF) exhibited most obvious differences among the clustered lower limbs. The created stratified shape-driven sizing system and methodologies further involved the body shape classifications into the Cir-based size categories to cater for diverse body morphologies in product size selection, thus improving dimensional fitness and accurate treatment using compression textiles in practice.

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