scholarly journals Calibration and Validation of an Experimental Setup for the Measurement of the Cylindrical Body Shapes and Curvatures of the Objects and Subjects through the Techniques of Rasterstereography

Author(s):  
Majeed Ahmed ◽  
Syed Anwar Ali Zaidi

The intent of study is to establish a criterion for the experimental setup of rasterstereography, one that is more efficient, simple, accurate and precise to examine and analyse the curvature of the object or the subject. Firstly, the setup is needed to be calibrated and for this purpose we considered a reference plane, eleven cylinders of different diameter ranging from 30-119mm were used for calibration of curvature maps of cylinders and cylindrical objects through the regression line. Further this model was tested on subjects and for that we reckoned cylindrical body parts of boys and a total of 30 college students were involved as subjects in this process. The body parts to be measured had curvature like cylinders of different diameters ranging from 42-120mm. The distortion of raster grid was observed, quantified and recorded with the help of different tools and results were established. The regression line was obtained between the measured (x) and computed (y). The standard error of the cylindrical object was 0..04 and that of cylindrical body parts of subjects was 0.0407. This technique was validated through the coefficient of correlation for objects and subjects which was found to be 0.99982 and 0.999141 respectively. Accuracy and Precision were also calculated for this model, which were 99.60% accurate and 99.49% precise. Curvature maps were found more than 99%. This technique is inexpensive, reliable, reproducible and may be installed easily in hospitals to examine appraise body shape, composition and deformities of young men.

Body schema refers to the system of sensory-motor functions that enables control of the position of body parts in space, without conscious awareness of those parts. Body image refers to a conscious representation of the way the body appears—a set of conscious perceptions, affective attitudes, and beliefs pertaining to one’s own bodily image. In 2005, Shaun Gallagher published an influential book entitled ‘How the Body Shapes the Mind’. This book not only defined both body schema (BS) and body image (BI), but also explored the complicated relationship between the two. The book also established the idea that there is a double dissociation, whereby body schema and body image refer to two different, but closely related, systems. Given that many kinds of pathological cases can be described in terms of body schema and body image (phantom limbs, asomatognosia, apraxia, schizophrenia, anorexia, depersonalization, and body dysmorphic disorder, among others), we might expect to find a growing consensus about these concepts and the relevant neural activities connected to these systems. Instead, an examination of the scientific literature reveals continued ambiguity and disagreement. This volume brings together leading experts from the fields of philosophy, neuroscience, psychology, and psychiatry in a lively and productive dialogue. It explores fundamental questions about the relationship between body schema and body image, and addresses ongoing debates about the role of the brain and the role of social and cultural factors in our understanding of embodiment.


Author(s):  
Cristóbal Pera

ABSTRACTIf the human body is really a fabric, should surgeons be considered architects, as some surgeons describe themselves today? The author raises and analyzes this question, and he concludes that vsurgeons cannot be considered as such: the architect is the creator of his work —fabric or building—, but the surgeon is not the creator of this complex biological fabric —vulnerable and subject to deterioration and with an expiration date— which is the human body. This body is the object upon which his hands and instruments operate. The surgeon cures and heals wounds, immobilizes and aligns fractured bones in order to facilitate their good and timely repair, and cuts open the body’s surface in order to reach its internal organs. He also explores the body with his hands or instruments, destroys and reconstructs its ailing parts, substitutes vital organs taken from a donor’s foreign body, designs devices or prostheses, and replaces body parts, such as arteries and joints, that are damaged or worn out. In today’s culture, dominated by the desire to perfect the body, other surgeons keep retouching its aging façade, looking for an iconic and timeless beauty. This longing can drive, sometimes, to surgical madness. The surgeon is not capable of putting into motion, from scratch, a biological fabric such as the human body. Thus, he can’t create the subject of his work in the way that an architect can create a building. In contrast, the surgeon restores the body’s deteriorated or damaged parts and modifies the appearance of the body’s façade.RESUMEN¿Si el cuerpo humano fuera realmente una fábrica, podría el cirujano ser considerado su arquitecto, como algunos se pregonan en estos tiempos? Esta es la cuestión planteada por el autor y, a tenor de lo discurrido, su respuesta es negativa: porque así como el arquitecto es el artífice de su obra —fábrica o edificio— el cirujano no es el artífice de la complejísima fábrica biológica —vulnerable, deteriorable y caducable— que es el cuerpo humano, la cual le es dada como objeto de las acciones de sus manos y de sus instrumentos. El cirujano cura y restaña sus heridas, alinea e inmoviliza sus huesos fracturados para que su reparación llegue a buen término, penetra por sus orificios naturales o dibuja sobre la superficie corporal incisiones que le permitan llegar a sus entrañas, las explora con sus manos o mediante instrumentos, destruye y reconstruye sus partes enfermas, sustituye órganos vitales que no le ayudan a vivir por los extraídos de cuerpos donantes, y concibe, diseña y hace fabricar artefactos o prótesis, como recambio fragmentos corporales deteriorados o desgastados, como arterias o articulaciones. Otros cirujanos, en la predominante cultura de la modificación del cuerpo, retocan una y otra vez su fachada envejecida ineludiblemente por el paso del tiempo, empeñados en la búsqueda incesante de una belleza icónica y mediática e intemporal, una pretensión que puede conducir, y a veces conduce, al desvarío quirúrgico. En definitiva, el cirujano es incapaz de poner de pie, ex novo, una fábrica biológica como la del cuerpo humano y, por lo tanto, no puede ser su artífice, como lo es el arquitecto de su edificio. A lo sumo, es el restaurador de sus entrañas deterioradas y el modificador de su fachada, de su apariencia.


2007 ◽  
Vol 35 (3) ◽  
pp. 371-382 ◽  
Author(s):  
Radhika Rao

The legal status of the human body is hotly contested, yet the law of the body remains in a state of confusion and chaos. Sometimes the body is treated as an object of property, sometimes it is dealt with under the rubric of contract, and sometimes it is not conceived as property at all, but rather as the subject of privacy rights. Which body of law should become the law of the body? This question is even more pressing in the context of current biomedical research, which permits commodification and commercialization of the body by everyone except the person who provides the “raw materials.” The lack of property protection for tangible parts of the human body is in stark contrast to the extensive protection granted to intellectual property in the body in the form of patents upon human genes and cell lines. Moreover, even courts that reject ownership claims on the part of those who supply body parts appear willing to grant property rights to scientists, universities, and others who use those body parts to conduct research and create products.


2021 ◽  
Vol 1199 (1) ◽  
pp. 012019
Author(s):  
S Sivák ◽  
S Maláková

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.


2020 ◽  
pp. 64-73
Author(s):  
Shivam Grover ◽  
◽  
◽  
◽  
Kshitij Sidana ◽  
...  

Performance capture of human beings have been used to animate 3D characters for movies and games for several decades now. Traditional performance capture methods require a dedicated costly setup which usually consists of more than one sensor placed at a distance from the subject, hence requiring a large amount of budget and space to accomodate. This lowers its feasibility and portability by a huge amount. Egocentric (first-person/wearable) cameras, however, are attached to the body and hence are mobile. With a rise of acceptance of wearable technology by the general public, wearable cameras have gotten cheaper too. We can make use of their excessive portability in the performance capture domain. However working with egocentric images is a mammoth task as the views are severely distorted due to the first-person perspective and the body parts farther from the camera are highly prone to being occluded. In this paper, we review the existing state-of-the-art methods about performance capture using egocentric based views.


2019 ◽  
Vol 9 (7) ◽  
pp. 67 ◽  
Author(s):  
Khvatov ◽  
Sokolov ◽  
Kharitonov

Body awareness was studied experimentally in the rat snakes Elaphe radiata. The experimental design required that the snakes take into account the limits of their bodies when choosing a suitable hole for penetration into the shelter. The experimental setup consisted of two compartments, a launch chamber and a shelter, separated by a partition with openings of different diameters. The diameters of the holes and/or their position in the partition were changeable. The subjects were 20 snakes divided into two groups, for one of which only the locations of the holes varied; for another, both the location of the holes and the limits of the body varied. The body was increased by feeding the snakes. In the course of the first three experimental series the snakes formed the skill of taking into account the body limits, which manifested in the reduced number of unsuccessful attempts to select holes too small for their bodies. During the fourth series, with the locations of holes randomized for each trial, the snakes demonstrated behavioral flexibility, significantly more often penetrating into the shelter from the first attempt irrespectively of the location of the suitable hole. We argue that these results demonstrate the body-awareness in snakes.


Perception ◽  
1993 ◽  
Vol 22 (1) ◽  
pp. 35-47 ◽  
Author(s):  
Lyn Haber ◽  
Ralph Norman Haber ◽  
Suzanna Penningroth ◽  
Kevin Novak ◽  
Hilary Radgowski

Nine methods of indicating the direction to object locations were tested on twenty blind adult subjects. The task was to indicate the location of active auditory targets distributed in a semicircle with a 1.7 m radius around the subject. Target location, practice, and feedback were systematically varied for each method. The greatest accuracy and lowest variability were found for pointing methods that used body parts (directing the nose at the target, facing it with the chest, and pointing with the index finger) and extensions of body parts (pointing with a hand-held cane or with a short stick). Two less accurate methods involved rotating a dial. The least accurate methods involved drawing and a verbal description in terms of clockface labels. Method interacted significantly with target location, and with individual differences. In general, the body-part and extension method were affected less than other methods by target location and individual differences. The findings suggest that a pointing response that uses a body part or an extension of a body part is the best choice for experimental or diagnostic measurement of object location by blind subjects. Differences between the results of this study of blind subjects and auditory localization accuracy in sighted subjects are discussed, and the implications for spatial processing in the blind are considered.


2015 ◽  
Vol 12 (2) ◽  
pp. 1131 ◽  
Author(s):  
Elif Eşiyok Sönmez

<p>Recently, one of the prominent subjects is the consumption for the body, its promotion and the result where the body becomes the subject of the consumption. Thus, the construction of the body as a consumption object and its permanent re-construction became a never ending ‘project’. There is no doubt such commodification and promotion become public through the media. Inevitably, such attention brings the researches on body policies in academic field. However, there is a serious shortage in Turkey on this kind of academic researches. This study was designed to contribute to the knowledge in the academic field. The basic aim of the research is to examine the structure of the nature of the body construction in the advertisements of the aesthetic products in Turkey. Therefore, the Cosmopolitan Magazine that is the women magazine to sold most in Turkey. The advertisements in the magazine in 2013 were scanned and 65 aesthetic product advertisements were found. These advertisements were analysed for their content with reference to the research questions. In the analysis, the matters like frequency of the advertisements in the magazine according to the months, distribution of the advertisements according to the body parts, negative and positive expressions in the advertisements on the appearance of the body, the images to be used in advertisements, the messages to be given for the use of the products and the slogans in the advertisements are considered. The analyses indicated that the aesthetic product advertisements are mostly published in February, March, April and June prior to the summer, the face is the part which aesthetic product advertisements mostly promoted, the younger and perfect appearance is given as the positive characteristics unlike other such as tired skin, aging skin and wrinkles on the skin. In order to be relied by the reader in the advertisements, the test results of the product and possible outcome after use are seen as to be included.</p><p> </p><p><strong>Özet</strong></p><p>Son yıllarda artarak ilgi odağı olan konulardan biri de beden için yapılan tüketim, bu tüketimin teşviki ve bunun sonucunda bedenin bir tüketim nesnesi haline gelmesidir. Öyle ki, bedenin tüketim nesnesi olarak inşası ve sürekli olarak yeniden yapılandırılması bitmeyen bir ‘proje’ haline getirilmiştir. Şüphesiz bu tür nesneleştirme ve promosyon çeşitli iletişim medyasından geçerek yaygınlaştırılmaktadır. Bunların bir sonucu olarak, bu tür ilgi akademik alanda da beden politikaları ile ilgili araştırmaların yapılmasını beraberinde getirmiştir. Fakat Türkiye’de bu bağlamda ciddi bir araştırma eksiklikliği bulunmaktadır. Bu araştırma bu eksikliğin ortaya çıkardığı akademik bilme gereksinimine katkıda bulunmak için tasarlandı. Araştırmanın temel amacı, Türkiye’de bedene ilişkin inşaların estetik ürün reklamlarında yapılandırılmasının doğasını inceleyerek var olan bilgiye katkıda bulunmaktır. Bu amaçla, Türkiye’de en fazla tirajı olan kadın dergisi Cosmopolitan inceleme için seçildi. Derginin bir yıllık reklamları tarandı ve 65 estetik ürün reklamı bulundu. Bu reklamların, araştırma sorularında belirtilen amaca uygun olarak,  içerik analizi yapıldı. Analizde, aylara göre reklamların dergideki yayın sıklıkları, beden bölgesine göre ürün reklamlarının dağılımları, bedenin görünüşüne ilişkin reklamlarda yer alan olumlu ve olumsuz ifadeler, reklamlarda kullanılan imajlar, ilgili ürünlerin kullanımının teşvik edilmesi için verilen mesajlar, ürün reklamlarında kullanılan sloganlar ele alındı. Yapılan analizde, estetik ürün reklamlarının en fazla Şubat, Mart, Nisan ve Haziran aylarında yaz dönemine girme öncesi yayınlandığı, estetik ürün reklamlarında en fazla yüz bölgesine odaklanıldığı, dış görünüşe ilişkin olarak genç ve kusuruz görünümün olumlu özellikler olarak verildiği, olumsuz özelliklerin ise çoğunlukla yorgun cilt, yaşlı görünüm ve kırışık cilt olduğu bulundu. Reklamlarda okuyucuda ürün kullanımına ilişkin güven sağlanması için, ürün kullanımı ile ilgili test sonuçları ve kullanım sonucunda meydana gelecek olası etkilere yer verildiği görüldü.</p>


1986 ◽  
Vol 125 (1) ◽  
pp. 271-285 ◽  
Author(s):  
J. M. Schmidt ◽  
J. J.B. Smith

The parasitoid wasps of the genus Trichogramma use the surface curvature of their insect egg hosts to set an upper limit to the number of progeny allocated to the host, as well as the duration of their host examination. In addition, host recognition and host acceptance are in part mediated by surface curvature. In this paper, the relationships between the positions of body parts of the wasp and surface curvature are examined in order to determine a possible mechanism for curvature detection by the wasp. Wasps of different sizes were photographed in profile while examining glass bead models of different diameters. The positions of selected body parts were analysed using a digitizer and microcomputer. The height of the wasp above the model surface did not change with surface curvature. Furthermore, the angle of the head relative to the thorax was also constant over the range of models used. Only the scapal-head angle and flagellar-head angle changed significantly with surface curvature. A curvature detecting mechanism is proposed in which the wasp uses the scapal-head angle to measure the curvature of the surface. The body of the wasp is maintained at a preferred height and angle to the substrate, serving as a fixed platform from which curvature measurements are made. Additional features of this mechanism, as well as its correlation with morphological and behavioural findings, are discussed.


Author(s):  
Dorothy Johnson

In late eighteenth-century France, at the seeming height of neoclassicism in the arts with its goal of idealized form al’antica in the depiction of the human figure, an intensified fascination with the visual experience of viscera emerged.  Picturing viscera became increasingly common in visual culture.  These developments occurred during a period of intense political and cultural upheaval and concomitant violence and bloodshed in France. Graphic anatomical plates, prints, and caricatures as well as wax models of viscera cast from the body parts of corpses, were used for pedagogical instruction as were écorché figures, either sculpted or cast from cadavers. Paintings were made that engaged the subject of death and disembowelment. We also see the actual participation in dissection by artists as well as anatomists. Artists, anatomists, and amateurs (sometimes working in concert) produced compelling images of what lies beneath the skin for a variety of purposes and functions.


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