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Effects of coal tar pitch addition on the wear behavior of carbon/carbon composites
Young Chan Jung, Duk Soo Kang, Kyong Yop Rhee, Soo Jin Park, David Hui 한국탄소학회 Carbon Letters 4 Pages
한국탄소학회 Carbon Letters 2016, Vol.20 9 62-65 (4 pages)
coal tar pitch addition on the wear behavior of C/C 63 http://carbonlett.org coal tar pitch was 2.099 × 10 1, and that for the specimen with 30 wt% coal tar pitch was 2.708 × 10 1. It can be observed from the table that, in comparison to the specimen without coal tar pitch, the specimens with coal tar pitch showed lower wear volume loss; in particular, the specimen with 10 wt% showed around... Carbon/carbon (C/C) composites are acknowledged as high performance materials because of their good mechanical properties such as wear resistance, even at the higher temperature, due to their low thermal expansion [1-5]. Their hardness and light weight in addition to their superior mechanical properties at high temperature make C/C composites the best material to make brakes for aircrafts and other high weight vehicles. Accordingly, a number of studies have been conducted on the performance of... -
Comparison of spatio-temporal gait parameters according to shoe types in chronic stroke survivors
Soung Kyun Hong, Su Ho Park, Sung Ri Shin, Dong Geon Lee, Seung Hoo Lee, Sun Hye Jung, Seung Hyeon Pyo, Kyeong-Bong Lee, Gyu Chang Lee 물리치료재활과학회 Physical Therapy Rehabilitation Science 6 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2018, 제 7권 제 1호 5 23-28 (6 pages)
showed a 22% reduction in the Timed Up and Go test (dynamic bal- ance), an increase in gait velociy of 37%, and an increase in cadence of 17%. In this study, the walking speed of subjects wearing the ankle-covered shoes was the greatest. These re- sults could provide a basic guideline for shoes worn in ev- eryday life after the initial stroke incident. However, these shoes also come with some... Objective: The purpose of this study was to investigate the impact of wearing various types of shoes on gait ability in stroke survivors and in order to gain information in regards to shoes that could possibly replace ankle orthosis. Design: Cross-sectional study. Methods: Eight hemiplegic survivors diagnosed with stroke participated in the study. Gait was analyzed using the GAITRite Electronic Walkway (CIR System Inc., USA) when subjects walked with no showed, walked with non-ankle-covered... -
Electromyographic analysis according to shoe weight during ambulation
Eun-sang Lee, Byung-hoon Lee, Ju-chul Cho, Yong-woo Lee, Seung-won Lee 물리치료재활과학회 Physical Therapy Rehabilitation Science 6 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2015, 제 4권 제 2호 9 115-120 (6 pages)
to fatigue. Hence, a sig- nificant association can be predicted between impact force and muscle fatigue, and this suggests that reductions in the ground reaction force and impact force causes a reduction not only in the impact conveyed to the body, but also in mus- cle fatigue. Furthermore, in one previous study [17], the an- kle inversion angle did not change significantly with in- creasing... Objective: To examine the effects of different shoe weights on lower leg muscle fatigue when walking by electromyographic(EMG) analysis due to the most effective weight for loading not being established. Design: Cross-sectional study. Methods: Thirty healthy university students (15 male, 15 female) were enrolled and randomly assigned into three conditions, which included wearing athletic shoes with an addition of 300 g, 500 g, and 1,000 g weights respectively. Prior to walking, all subjects were... -
The impact of head repositioning accuracy and proprioception on cervical stabilization exercise in healthy adults
Kyung Wook Kang, Dae Won Kang, Gu Ye Kwon, Han Byul Kim, Kyoung Min Noh, Gi Hyun Baek, Jin Kwan Cha, Hyun Hee Kim 물리치료재활과학회 Physical Therapy Rehabilitation Science 6 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2015, 제 4권 제 1호 9 49-54 (6 pages)
et al. [11] reported that the reduction of proprioceptive information led to the reduction of activation level of the surrounding muscles than controlled the joints. Spinal stabilization is related to a proper response to the information regarding spine protection and stabilization, and the information is obtained from all sensory organs, such as the passive subsystems, active subsystems, and... Objective: Cervical stabilization exercises are frequently to improve strength and endurance of cervical muscles. The purpose of this study was to identify changes in head repositioning accuracy (HRA) and neck proprioception through cervical stabilization exercises in healthy adults. Design: One group pretest-posttest design. Methods: Thirteen participants with no previous history of neck pain or injury to the cervical spine were recruited. HRA was measured by equipment including laser pointer,... -
Detection of Corynebacterium bovis infection in athymic nude mice from a research animal facility in Korea
Tae-Hyoun Kim, Dong-Su Kim, Ju-Hee Han, Seo-Na Chang, Kyung-Sul Kim, Seung-Hyeok Seok, Dong-Jae Kim, Jong-Hwan Park, Jae-Hak Par 대한수의학회 Journal of Veterinary Science 4 Pages
대한수의학회 Journal of Veterinary Science 2014, 제 15권 제 4호 13 583-586 (4 pages)
cats that should be noted. A previous study in coyotes demonstrated that the P/T ratio is rapidly reduced during the first year of life with a marked reduction as the years pass [5]. This rapid reduction of the P/T ratio during the juvenile period has not been observed in humans [2,3,12,16]. Rapid reduction of the P/T ratio during the juvenile period was represented equally in this study.... Corynebacterium (C.) bovis infection in nude mice causes hyperkeratosis and weight loss and has been reported worldwide but not in Korea. In 2011, nude mice from an animal facility in Korea were found to have white flakes on their dorsal skin. Histopathological testing revealed that the mice had hyperkeratosis and Gram-positive bacteria were found in the skin. We identified isolated bacteria from the skin lesions as C. bovis using PCR and 16S rRNA sequencing. To the best of our knowledge, this... -
Efficacy of nano-hydroxyapatite prepared by an aqueous solution combustion technique in healing bone defects of goat
Samit Kumar Nandi, Biswanath Kundu*, Samir Kumar Ghosh, Dipak Kumar De, Debabrata Basu 대한수의학회 Journal of Veterinary Science 10 Pages
대한수의학회 Journal of Veterinary Science 2008, 제 9권 제 2호 9 183-192 (10 pages)
gap. On day 21, the radiographs revealed a minimal periosteal reaction and smoothing edges with oval-shaped corners of the cortical bone defects. On day 30, radiographs indicated a substantial reduction in the gap size, which was in the process of obliteration by hard tissue materials of similar density to that of host bone. On day 60, the defect was not totally obliterated by newly grown... The present study was undertaken to evaluate porous hydroxyapatite (HAp), the powder of which was prepared by a novel aqueous solution combustion technique, as a bone substitute in healing bone defects in vivo, as assessed by radiologic and histopathologic methods, oxytetracycline labeling, and angiogenic features in Bengal goat. Bone defects were created in the diaphysis of the radius and either not filled (group I) or filled with a HAp strut (group II). The radiologic study in group II showed... -
A case of maloccluded incisor teeth in a beaver: Castor canadensis
Joong-hyun Kim, Jae Yeong Lee, Tae-Sung Han, Kyu-bo Han, Seong Soo Kang, Chun Sik Bae, Seok Hwa Choi 대한수의학회 Journal of Veterinary Science 3 Pages
대한수의학회 Journal of Veterinary Science 2005, 제 6권 제 2호 15 173-175 (3 pages)
and taper diamond bur (10 mm length) and a water-cooled, high-speed handpiece. Sequential transverse sections were removed until the crown was reduced to approximately its original length. The crown reduction described here was performed to prevent the occurrence of self trauma to the oral vestibule resulting in facial wound. The pulp chamber was never approached during the operation, as confirmed... A three-year-old female beaver (Castor canadensis) was referred to the Veterinary Teaching Hospital of Chungbuk National University. It had been raised in the Cheong-ju zoo and had a history of malocclusion caused by improper feeding. General anesthesia was induced, and preoperative intraoral dental radiographs of the rostal maxillary and mandibular dentition were taken and lateral and ventrodorsal extraoral radiographs of the cheek teeth were also taken. The radiographs were negative for apical... -
THE INFLUENCE OF STABILIZATION SPLINT ON CONDYLAR POSITION AND CRANIOFACIAL MORPHOLOGY
Young Jooh Yoon, Kwang Won Kim 대한치과교정학회 The Korean Journal of Orthodontics 14 Pages
대한치과교정학회 The Korean Journal of Orthodontics 1995, 제 25권 제 6호 3 675-688 (14 pages)
within anter으 posteriorly and infero-superiorly, and within 0.3mm transversely21’28’32’38’3^ The reduction of zero is not practicai and desirable，but the reduction can be obtained with an occlusal adjustment32^ Dr. Bnan Wong(personal communication) examined 250 pretreatment patients and found the amounts of CR-CO discrepancy to be 0.7mm antero-posteriorly, l.Omm vertically, and 0.3mm... The purposes of this study were: 1) to determine the? normal range of CR-CO discrepancy in normal occlusion group: 2) to evaluate the changes of condylar position and craniofacial morphology between centric relation and centric occlusion before and after stabilization splint therapy in malocclusion group outside the normal range of CR-CO discrepancy. The normal occlusion group consisted of 80 subjects who had well-balanced faces and good occlusions with acceptable Class I molar relationship.... -
The Staging of Major Mood Disorders
Ather Muneer, Rana Mazommil 대한신경정신의학회 Psychiatry Investigation 12 Pages
대한신경정신의학회 Psychiatry Investigation 2018, 제 15권 제 8호 2 747-758 (12 pages)
not notably diferent from controls. 45 Reduction in se- rum BDNF level may be a likely biomarker of acute episodes and could distinguish patients in a manic or depressive state from those in a euthymic phase at a sensitivity of 90% and a specifcity of 85%. 46 Another study observed that laboratory measurements of serum BDNF concentrations may discrim- inate bipolar from unipolar depression at... Objective_Staging of psychiatric disorders is gaining momentum and the purpose of this review is to examine whether major mood disorders can be defined according to stages. Methods_In April 2018 the PubMed electronic data base was scrutinized by a combination of various search terms like “major depressive disorder and staging,” “bipolar disorder and neuroprogression,” etc. To incorporate the latest findings the search was limited to the last 10 years. Both original and review articles were...