Special Shoes Research Articles

Comparison of in-shoe plantar pressure between Korean combat boots and running shoes

IntroductionCombat boots are special shoes designed for soldiers to wear during activities in rough terrain, such as long marches or military training. Combat boots have been known to cause high...

FORMATION OF CONSUMER PROPERTIES OF ELASTIC LEATHER MATERIALS

For the effective use of leather material by the consumer, not only the physical and mechanical properties stipulated by the standard are taken into account, but also the hygienic and aesthetic ones, the role of which is determined by the technological features of manufacturing and operating conditions of the corresponding products. In this regard, there is a need for a comprehensive study of the consumer properties of leather materials, which determine their product quality and value for the consumer. The purpose of the study is to determine the technological features of the formation of consumer properties of elastic leather materials. At the same time, the following tasks were implemented: the filling and finish tanning of the leather semi-finished product of chrome tanning for the elastic material of the model and special purpose shoe upper; a coating is formed on the material for model shoes; consumer properties of leather material for model and special-purpose shoes are established. Research methods: consumer properties of leather materials were determined by a complex of physical-chemical, photographic and organoleptic methods. Research results. The influence of coating compositions based on polyurethane, polyacrylurethane and modified polyacrylate on the complex of physical-chemical and hygienic properties of leather material was investigated. It has been established that leathers with polyacrylic urethane finishing are characterized by high values of physical and mechanical and especially hygienic properties. Finishing of the frontside surface of the semi-finished product with the use of a polyacrylic urethane composition makes it possible to form a leather material of a wide range of colors with consumer properties that determine its intended use.

Features of anthropometric indicators of the feet of adolescents of Zhambyl region

The comfort of shoes is one of the main indicators of the quality of shoes, which ensures the normal functioning and development of the foot in the process of growth and in general. In turn, the normal functioning and development of the foot determines the normal state of the whole organism, since the appearance of deviations in the foot leads to disturbances throughout the body. In the work, measurements of the feet of young men of the Zhambyl region were carried out in order to develop a size range of shoes, design shoe lasts and shoes with rational dimensional indicators. The measurements of the young men's feet were carried out using both standard and modern 3D scanning methods. The measurements were carried out among schoolchildren and students of higher educational institutions aged 15 to 18 years. As a result of measurements of young men's feet, variational series of dimensional characteristics, statistical data, and correlation-regression equations were calculated. The analysis of the obtained data was calculated using the methods of mathematical statistics and programming. The results of the study of the size of the feet will improve the socio-economic situation, which is expressed in providing the population of Kazakhstan with comfortable shoes that would take into account the anatomical, physiological and psychological characteristics of young men in Kazakhstan. The given data on the size of the feet of young men can be used in shoe factories, organizations for the tailoring of orthopedic and special shoes.

Effect of Novel Laser Shoe Photobiomodulation on Neuropathic Pain and Plantar Pressure Profile in Type 2 Diabetes Mellitus with Peripheral Neuropathy.

Photobiomodulation (PBM) or Low-level laser is used to treat diabetic foot complications. The existing method of laser application to the foot did not cover the foot's entire area to improve the foot's microcirculation. Therefore, we have developed a cost-effective Special LASER Shoe device, focusing exclusively on the entire foot region to manage neuropathic pain and other symptoms in individuals with type 2 diabetes mellitus. The main objective of the present study was to evaluate the effect of this newly developed special laser shoe PBM on neuropathic pain and plantar pressure profile in individuals with type 2 diabetes mellitus with neuropathy. We included 60 participants with diabetic peripheral neuropathy of both genders and age more than 20 years. Participants were treated with PBM by a specially designed novel Laser Shoe. Outcomes were clinical variables like Vibration Perception Threshold (VPT), Visual Analogue Scale (VAS), Michigan neuropathy screening instrument A&B, Ankle-Brachial Index (ABI), and Static dynamic gait parameters. Participants were with an average age of 62, and the average duration of diabetes was 11 years. Analysis showed a significant difference in VPT, VAS, Michigan neuropathic screening inventory, and ankle-brachial index. (P < 0.05). We conclude that Novel laser shoe photobiomodulation using 'Laser Shoe' effectively reduces peripheral neuropathic pain. It is also effective in reducing average and maximum plantar pressure. Reduction in neuropathic pain and improvement in plantar pressure distribution can reduce further complications.

Investigation of the relationship between plantar pressure and calf muscle tone. development and testing of the new test bench

Plantar pressure is the most important biomechanical parameter for evaluating and modeling postoperative treatment conditions for patients with deformity of the first ray of the foot. Modern foot surgery involves early activation of the patient after surgery. The universality and reliability of this approach after surgical correction of valgus deformity of the first toe is questionable. In this regard, studies are being conducted to determine the quantitative parameters of plantar pressure under normal conditions and with the use of postoperative footwear used to reduce it in the forefoot. The relationship between calf muscle tone and plantar pressure in the forefoot has been established. There have been no studies determining the influence of calf muscle tone on the effectiveness of unloading the forefoot using postoperative footwear. The plantar pressure has been studied experimentally, including the influence of the calf muscle tone. An experimental stand was developed and tested: it was used to study the distribution of pressure under the foot in 26 healthy individuals in the standing position on a platform and in postoperative shoes. Quantitative assessment of the tone of the calf muscle in the same subjects was carried out. The plantar pressure in subjects wearing postoperative shoes and the amplitude of dorsal flexion of the ankle joint with the knee joint straightened and flexed at 90 degrees were compared. The mean load reduction in postoperative shoes was 57 %, median 60 %. Measurement of calf muscle tone (extensibility) can be used to predict whether forefoot loading will be reduced with the use of special shoes. The dorsiflexion angle of the foot should be used as a criterion: if it is greater than 10 degrees, there is a high probability that forefoot loading will be reduced. For dorsiflexion measured at the straightened knee joint, the probability of predicting the effectiveness of postoperative footwear is 79 %. A similar probability when using the amplitude of dorsiflexion of the foot measured with the knee joint flexed at 90 degrees as a prediction criterion was 66 %.

Effects of Artificially Induced Leg Length Discrepancy on Treadmill-Based Walking and Running Symmetry in Healthy College Students: A Lab-Based Experimental Study.

Leg length discrepancy (LLD) is a common postural deviation of musculoskeletal origin, which causes compensatory reactions and often leads to injury. The aim of the study was to investigate the effect of artificially induced LLD on gait symmetry by means of the spatiotemporal gait parameters and ground reaction forces (GRFs) using a treadmill equipped with capacitive sensors (instrumented) as well as the EMG activity of trunk and hip muscles during walking and running. Twenty-six healthy male and female college students were required to perform two sets of four 2.5-min walking and running trials on an instrumented treadmill at 5.6 and 8.1 km·h-1, respectively, without (0) and with 1, 2, and 3 cm LLD implemented by wearing a special rubber shoe. Statistical analysis was performed using one-way repeated measures or a mixed-design ANOVA. Most spatiotemporal gait parameters and GRFs demonstrated an increase or decrease as LLD increased either on the short-limb or the long-limb side, with changes becoming more apparent at ≥1 cm LLD during walking and ≥2 cm LLD during running. The EMG activity of trunk and hip muscles was not affected by LLD. Our findings showed that gait symmetry in terms of treadmill-based spatiotemporal parameters of gait and GRFs is affected by LLD, the magnitude of which depends on the speed of locomotion.

Combining Computer Vision, Artificial Intelligence and 3D Printing in Wheelchair Design Customization: The Kyklos 4.0 Approach

In the current paper, we present our work towards developing a solution combining computer vision and AI to support footrest design customization in the wheelchair industry. Wheelchairs and postural systems are complex and often user centric in the design process. Those products require a wide range of adjustments to adapt to the various anthropometries and disabilities of patients. Most commercial products, dedicated to severe disability, also include a series of additional elements, designed to keep the patient in a comfortable but “fixed” position. Such systems do not allow to “fix and maintain” the position of patient foot, especially for patients who have no control over their lower limbs. For that reason, it becomes essential to supply wheelchairs with specific elements to hold patient's shoe in place. Commercial foot supports are typically developed on standard sizes and do not always cover the entire population. In addition, those designs are based on standard shoes, thus they do not lend themselves well to adapting to special shoes or orthopedic shoes. Feet final position therefore becomes a key element in correct postural management. In this paper, we investigate the use of computer vision and AI to correctly define customization parameters of the footrest. The proposed design has been developed based on the specifications received from the Pro Medicare S.r.l[ https://www.promedicare.eu/en/] orthopedic technicians. We present suitable algorithms, design principles and well defined components towards the implementation of our proof of concept. We also present the testing activities we have undertaken and the obtained performance results.

OPTIMIZATION OF THE PROCESS OF PROVIDING THE COMPANY WITH SPECIAL SHOES BASED ON DATA ON ITS ISSUANCE AND INDICATORS OF IMPRORER PLANNING

Timely and full provision of employees of enterprises with personal protective equipment is an important task in the occupational health and safety management system. Since the costs of large companies for the purchase of PPE amount to impressive amounts, companies seek to optimize costs by centralizing purchases and purchasing PPE at wholesale prices. As a result of centralized purchases, the purchase price of a unit of goods decreases, however, a number of problems arise when planning purchases related to the variety of anthropometric data of employees of the enterprise and the time lag for the supply of products.&#x0D; This article discusses the problems and approaches to solving them when providing employees with personal protective equipment for their feet (special shoes) on the example of PJSC «RTK». The data on the issue of shoes from the warehouse for 3 years are given, reflecting the picture of the deficit and surplus of the demand for standard sizes of the shoe range at the enterprise. Attempts have been made to analyze the available data array. Possible reasons and indicators of incorrect planning (provision) of PPE are formulated. Approaches to further development of optimization of PPE planning are proposed.

Smart Landmine and Restraining Shoes

Abstract: The smart landmine and restraining shoes project is an innovative solution to reduce the risk of accidental detonation of landmines. The project involves the use of an esp32 module and an RFID tag embedded in a special shoe. When the shoe with the RFID tag is placed on the landmine, it acts as a safety mechanism preventing the mine from being triggered. This technology ensures that the shoes do not trigger the landmines when army personnel steps on them. However, if a terrorist step on the shoe, the RFID tag is detected, causing the landmine to detonate and neutralize the threat.

Smart Shoes Safety System for the Blind People Based on (IoT) Technology

People’s lives have become easier and simpler as technology has proliferated. This is especially true with the Internet of Things (IoT). The biggest problem for blind people is figuring out how to get where they want to go. People with good eyesight need to help these people. Smart shoes are a technique that helps blind people find their way when they walk. So, a special shoe has been made to help blind people walk safely without worrying about running into other people or solid objects. In this research, we are making a new safety system and a smart shoe for blind people. The system is based on Internet of Things (IoT) technology and uses three ultrasonic sensors to allow users to hear and react to barriers. It has ultrasonic sensors and a microprocessor that can tell how far away something is and if there are any obstacles. Water and flame sensors were used, and a sound was used to let the person know if an obstacle was near him. The sensors use Global Positioning System (GPS) technology to detect motion from almost every side to keep an eye on them and ensure they are safe. To test our proposal, we gave a questionnaire to 100 people. The questionnaire has eleven questions, and 99.1% of the people who filled it out said that the product meets their needs.

Congenital Oblique Talus Spontaneous Reduction-Case Report

Congenital oblique talus is a very rare condition which presents as an isolated deformity or in association with neuromuscular and/or genetic disorders. Pathoanatomically the deformity shows a dislocated talonavicular and subtalar joint. The ethiology and pathogenesis are still not finally determined, although in some cases a genetic basis has been identified. The clinical picture is that of a flat longitudinal arch. Clinical diagnosis is confirmed by plain radiographic imaging of anteroposterior and lateral views. Congenital oblique talus should not be confused with other deformities of the foot, such as congenital vertical talus, which with stress view X-Ray can be reduced. The object of treatment of congenital oblique talus is to restore a normal anatomical relationship between the talus, navicular bone and calcaneus. Good early results of modified non-operative treatment using serial manipulations, physiotherapy, special shoes or cast treatment may change therapeutic concepts.

Determinats of irritant contact dermatitis in seaweed farmers

Irritant contact dermatitis is an acute or chronic skin inflammatory response to exposure to external irritants that affect the skin. One type of work that is easily exposed to irritants is seaweed farming, because of the hydroid content in seaweed. The purpose of this study was to determine the factors associated with the symptoms of irritant contact dermatitis in seaweed farmers in Dusun Lomboan, distric. South Tinangkung Regency Banggai Kepulauan. This study uses a type of analytical observational research with a cross sectional study approach. The sample in this study were 40 workers using the total sampling technique. Data collection was carried out through observation, interviews and questionnaires. Data were analyzed using the Chi-Square test. The statistical test results showed that contact duration (p value = 0.012), years of service (p value = 0.001), personal hygiene (p value = 0.013) and history of skin disease (p-value = 0.015) had a relationship with irritant contact dermatitis symptoms. It is recommended for seaweed farmers to use PPE when working, for example rubber gloves, special shoes, to avoid direct exposure which can cause irritant contact dermatitis. Also always maintain personal hygiene after doing work such as washing hands using soap with running water and bathing to avoid the risk of irritant contact dermatitis

Anthropometric studies of dancers’ feet

The article presents an analysis of the results of anthropometric studies of a group of dancers specializing in the performance of pop-folk dances, which is necessary for the further development of a scientifically based design of special shoes. The features of dance shoes, the requirements for them, the nature of the loads on the feet during the performance of folk dance are shown. As part of the research work, anthropometric studies were carried out using a computer plantograph PKS-01. From the feet of a group of dancers, data were taken before classes and after the rehearsal. Primary processing of the data obtained made it possible to identify changes in the parameters of the feet of the subjects. The data obtained are systematized according to various criteria. The subjects were divided into groups of «right-handed», «left-handed» and «ambidexter» (a person who does not have a dominant arm or leg to perform an activity; the functioning of both arms or legs is equally developed, actions are performed with the same strength, speed and accuracy). With such a systematization, the dependence of changes in the parameters of the feet on the nature of the loads was noted. The result of the study is systematized data, as well as preliminary conclusions, on the relationship between changes in the longitude-latitudinal parameters of the foot and compensatory reactions of the corresponding muscles of the body to the loads experienced by the «leading» limb. This approach is being developed within the framework of the master’s program «Development of the design and manufacturing technology of various types of special footwear» and is expected to be introduced into the educational process of the department «Artistic modeling, design and technology of leather products», RSU A.N. Kosygin (Technology. Design. Art) in the form of a textbook, in accordance with the Research Plan of the Russian State University. A.N. Kosygin for 2019–2023, problem 1. «Matrix approach to the formation of digital industry 4.0 at industrial enterprises of the textile and light industry», the implementation of theme No. 1.2 «Development of the innovative potential of enterprises for the production of leather goods based on modern digital design technologies and rapid prototyping».

A Novel Approach by Needles in the Payzone of Heterogeneous Tight Carbonate: A Case Study for Offshore Marginal Field

The new Fish-bones Completion &amp; Stimulation approach by needles in the pay stack aims at addressing heterogeneous tight carbonate by increasing flow area in the lower permeable streaks, which is efficient as hundreds of tunnels drain connecting the borewell to the body of the reservoir to increase well productivity and oil recovery. The initial plan includes selecting the best ones from Stair step horizontal well, Dual Lateral well, five lateral fish-bone drilling, and horizontal drilling along with hydraulic fracture. Considering the lessons of failure to clean internal tubes, the modified 4-1/2” Liner is installed in the lower two sub-layer by jetting subs combing with production subs for matrix acidizing in the upper one sub-layer as per modified Fish-bones Completion Design. In addition, special acid-releasing float shoes and new fishing baskets are applied to avoid those previous problems with this well technique. The candidate well shows good oil test and production, which improved by three times at 2000bbl/d with respect to the initial plan in the B field. This paper describes the technology background and characteristics, design factors, modified design, execution, well test, and lessons learned during implementation.

DEVELOPMENT OF COMFORTABLE SHOES FOR PEOPLE WITH DISABILITIES

A physically healthy person has no problem putting on shoes or getting dressed daily. Meanwhile, the same issue for people with disabilities is often considerable discomfort or complete inability to perform this task independently. A survey, which allows us to obtain the most reliable information in the required amount, was conducted to determine the consumer’s priority requirements when choosing shoes for people with disabilities. This information was used to create the improved footwear design for this group of consumers. The development of comfortable footwear for people with disabilities should provide ergonomic and aesthetic features of the design, take into account the anatomical and morphological characteristics of the feet in the design, and be based on typical technological processes, without radical reorganization of production. The footwear for people with disabilities during prosthetics of the lower limb should provide easy penetration of the foot prosthesis into the shoe. That means that this footwear should be pretty spacious in design. There is also a problem with fastening clothes and shoes in the case of prosthetics of the upper limb. Therefore, the method of fastening special shoes should also be convenient and meet the needs of people with disabilities. A model of the footwear of the sports style was designed based on research and review of the modern market of orthopedic footwear, which will provide the comfort of the foot or prosthesis in the shoe by combining the use of structural elements such as a blind valve with a loop for fixing lacing, zipper and lacing.

From friction to air resistance

Friction occurs early in our lives. We rub our hands and stamp our feet to get them warm. Another effect of friction is the use of winter tires at cars, new bicycle tires, or special shoes for icy surface. This article discusses how to present the way from friction to air resistance through GeoGebra applets. The approach has been analyzed using the theory of technology as amplifier and reorganizer, theory of variation, and the notion of internal and external representations. The dragging feature of GeoGebra enables students to experience variation and make conjectures. Furthermore, students’ static internal representations will be enhanced to dynamic external representations, which can play an important role in students’ learning. Three aspects of fidelity have been discussed with regard to the use of GeoGebra based applets and how such applets need to be critically designed and assessed in order to support students’ learning.

TECHNOLOGY FOR OBTAINING SPECIAL LEATHERS WITH IMPROVED PERFORMANCE CHARACTERISTICS, RESISTANT TO OIL AND PETROLEUM PRODUCTS

A technology is proposed for obtaining leathers for the uppers of special footwear intended for employees of oil-producing enterprises. Leathers for uppers made from cattle skins produced by this technology are distinguished by a combination of high strength, hygienic and protective characteristics, including resistance to oil and oil products, as well as to biodegradation. The technology for obtaining special shoe leathers includes a through complex processing of semi-finished leather products with non-equilibrium low-temperature plasma and a solution of silver nanoparticles .

Pain monitoring to determine the optimal timing of activation of patients after reconstructive surgery for transverse flatfoot

In 30 patients with flat foot and hallux valgus reconstructive operations by CITO and Shev- rons techniques were performed on both feet. Pain monitoring using Card of pain audit was carried out at rest and under load. In 15 patients feet loading was started on the 6 postoperative day and in other 15 patients on the 4 day. Pain audit showed that the optimum time for the patient activization was the 4th postoperative day with use of special postoperative shoes and without plaster dressing and additional support. Use of computer system Balance test was shown to be a perspective for the objective evaluation of postoperative weight-bearing ability, efficacy of patient activization as well as for the acceleration of patient adaptation to postoperative loads.

Comparative Analysis of Cartons for the Substrate in Special Shoes of the Sandal-Glue Method of Fastening

Comparative Analysis of Cartons for the Substrate in Special Shoes of the Sandal-Glue Method of Fastening

Testing Selected Personal Protection Items of Firefighters in Combined Conditions of Mechanical Loads and Temperatures Occurring during Gas LNG Leaks

The article examined selected individual protection used during rescue and fire-extinguishing activities. Fire helmet and special shoes were examined under conditions resembling the operational conditions of LNG gases. The assessment of the equipment consumption was based on strength tests. The main threats come from thermal and mechanical factors. Therefore, firefighters must properly protect their head and legs. At −80 °C, the energy of the impact force of the beater in the headache was, 12.4 J and 15.1 J for points P1 and P2, respectively. The studies showed that cooling the chamber to −80 °C adversely affected the structure of the fire helmet exposed to impact Dynamic. Research work was carried out as part of the Research and Development project No. DOB-BIO9/15/02/2018.