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Distributed Sensor Network Based on RFID System for Localization of Multiple Mobile Agents

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Wireless Sensor Network 2011年第1期3卷 1-9页

作者： Byoung-Suk Choi Joon-Woo Lee Ju-Jang Lee kyoung-taik park 不详

This paper presents a distributed wireless sensor network for multiple mobile agents localization. Localization of mobile agents, such as mobile robots, humans, and moving objects, in an indoor space is essential for robot-robot interaction (RRI) and human-robot interaction (HRI). The standard localization system, which is based on sensors installed in the robot body, is not suitable for multiple agents. Therefore, the concept of sensor network, which uses wireless sensors distributed in a specified space, is used in this study. By analyzing related studies, two solutions are proposed for the localization of mobile agents including humans: a new hardware system and a new software algorithm. The first solution focuses on the architectural design of the wireless sensor network for multiple agent localization. A passive RFID system is used, and then the architecture of the sensor network is adapted to suit the target system. The second solution centers on a localization algorithm based on the sensor network. The proposed localization algorithm improves the accuracy in the multiple agent localization system. The algorithm uses the displacement conditions of the mobile agents and the recognition changes between the RFID tags and RFID reader. Through experiments using a real platform, the usefulness of the proposed system is verified.

关键词： Multiple Robot Localization Distributed Sensor Network RFID System

A Study on Welding Defect of Welded Tube by Using CO2 Laser

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A Study on Welding Defect of Welded Tube by Using CO2 Laser

Distributed Sensor Network Based on RFID System for Localization of Multiple Mobile Agents

第二十三届中国控制会议

作者： Jeong Suh Jae-Hoon Lee Hie-Sin Kang kyoung-taik park Moon-Yong Lee Byung-Hun Jung Korea Institute of Machinery & Materials Technical Institute of Sungwoo Hitech Co. LTD

To minimize the weld defect in manufacturing the welded tube by using CO2 laser, the monitoring of the welding quality and the seam tracking along the butt-joint lengthwise to the tube axis are studied. The tube, 60kgf/mm2grade steel sheet, is formed by 2 roll bending machine. The tube has the thickness 1.5mm, diameter 105.4mm and length 2000mm. The longitudinal butt-joint of the tube is welded by the CO2 laser welding system equipped with the seam tracker and plasma *** precise positioning (<200μm) of the laser beam on the butt-joint to be assembled is obtained by the seam tracker with MVS-5 sensor (combination of laser emitter and CCD camera). The artificial defects (<φ1mm) in the butt-joint are well observed by the signal of plasma intensity measured by the plasma sensor of UV wavelength range (<400nm). The developed CO2 laser tube welding system has the function of the precision seam tracking and the real-time monitoring of the welding quality. Finally, the laser welded tube can be used for manufacturing of automobile chassis and components after tubular hydro-forming.

关键词： CO2 Laser welded tube seam tracking plasma intensity weld quality monitoring.

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Impact of adolescent complex regional pain syndrome on the psychopathology of young men ahead of military service: A retrospective cohort analysis of Korean conscription data

Wireless Sensor Network 2011年第1期

作者： Byoung-Suk Choi Joon-Woo Lee Ju-Jang Lee kyoung-taik park

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Military Medical Research 2021年第3期8卷 363-372页

作者： Shin-Heon Lee Myeong-Jin Ko Taek-Kyun Nam Jeong-taik Kwon Yong-Sook park Department of Neurosurgery College of MedicineChung-Ang UniversitySeoul 06973South Korea

Background: The relationship between physical and psychopathological features in complex regional pain syndrome(CRPS) has been a subject of constant interest, but no data are available in adolescents. Therefore, we aimed to identify the factors associated with psychopathology in adolescents with CRPS ahead of military ***: We retrospectively reviewed all conscription examinees who had completed a Military Personality Inventory(MPI) during a period between February 2013 and December 2016. A total of 63 persons with a history of CRPS(19-years of age for all) were enrolled. Basic demographic and pain-related data were analyzed to examine their association with MPI results. The mean FGR score as well as the 8 subdomain scores were compared between those with pain duration at <15 months(n=30) vs. ≥15 months(n=33). Binary MPI results(normal-abnormal) were also compared between the two ***: In multivariate analysis, abnormal MPI was associated with pain duration, with an odds ratio(OR) at 1.05 for every 1-month increase [95% confidence interval(CI) 1.02–1.08;P=0.002]. Subjects with pain duration at ≥15 months have lower faking good response score(P<0.001 vs. those with pain duration at <15 months), and higher abnormal MPI result rate, faking bad response, inconsistency, anxiety, depression, somatization, paranoid, personality disorder cluster A, and personality disorder cluster B scores(P<0.05). Pain duration was significantly associated with the MPI ***: Pain duration is associated with psychopathology in adolescents with CRPS. Psychopathologic features increased as the disease duration increased. A comprehensive understanding of time-dependent psychopathological factors could support the planning of multimodal approaches for managing adolescent CRPS.

关键词： Chronic pain Complex regional pain syndromes Psychopathology Personality inventory Adolescent Military personnel

Effect of Cristobalite and Quartz on the Properties of Gypsum Bonded Investment

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Journal of Materials Science & Technology 2008年第1期24卷 143-144页

作者： Yun-Jong Kim Sang-Bae Kim Hyun-Hye park Myeong-Deok Seo Byoung-Cheon Lee Man-So Han taik-Nam Kim Sung-Baek Cho Korea Institute of Geoscience and Mineral Resources (KIGAM) Gajeong-dong 30 Yuseong-kuDaejeon 305-350Korea Department of Materials Engineering Graduate School Paichai UniversityDaejeon 302-735Korea Dept.of Dental Laboratory Technology Daejeon Health Science College Korea

Generally the gold investment material consists of cristobalite,quartz and *** physical property of gold investment materials depends on its thermal expansion coefficients,compressive strength,and particles size *** the thermal expansion coefficient of cristobalite and quartz are 2.6×10^-6/℃and 2.32×10^-6/℃respectively,the composition ratio of each components influence the thermal and physical properties of gold investment *** the clinical applications,it is necessary to improve the properties of gold investment materials such as homogeneous size distribution and thermal expansion *** the present study,effect of inorganic fillers such as cristobalite and quartz on gold alloy investment was investigated to improve the properties of *** compressive strength and thermal expansion coefficients of the specimens were *** results showed that cristobalite and quartz were homogeneously distributed by milling. The optimum compressive strength was obtained at the ratio of 42：22 cristobalite and quartz,respectively.

关键词： Investment Cristobalite Quartz Thermal expansion coefficient Compressivestrength

Transanal excision of a malignant fibrous histiocytoma of anal canal:A case report and literature review

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World Journal of Gastroenterology 2008年第9期14卷 1459-1462页

作者： Beom Gyu Kim In taik Chang Jun Seok park Yoo Shin Choi Gi Hyeon Kim Eon Sub park Chang Hwan Choi Department of Surgery College of MedicineChung-Ang University Seoul 156-755Korea Department of Radiology College of MedicineChung-Ang University Seoul 156-755Korea Department of Pathology College of MedicineChung-Ang University Seoul 156-755 Korea Department of Internal Medicine College of Medicine Chung-Ang UniversitySeoul 156-755Korea

Malignant fibrous histiocytoma, which is composed of spindle-shaped cells arranged in a pleomorphic and storiform pattern, is rarely found in the colorectum. Although complete surgical excision remains the main stem of therapy, an optimal treatment strategy according to the stage has not been elucidated. We report a case of a 63-year-old woman with an ulcerative lesion in the anorectal junction and a final diagnosis of malignant fibrous histiocytoma. We introduced an access for transanal local excision and adjuvant radiotherapy because the patient refused abdominoperineal resection. No local recurrences or distant metastases were observed 15 mo after the operation. To our knowledge, this is the first case reported in the English literature of a malignant fibrous histiocytoma treated with the transana local excision and adjuvant radiotherapy. This report showed that this approach is selectively reserved for early-stage malignant fibrous histiocytoma and for those patients who refuse radical surgery because of the risk in a permanent colostomy.

关键词： Malignant fibrous histiocytoma Anorectal junction Transanal local excision

Retroperitoneal desmoplastic small round cell tumor:Pediatric patient treated with multimodal therapy

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World Journal of Gastroenterology 2009年第33期15卷 4212-4214页

作者： Yong Seok Kim Seong Jae Cha Yoo Shin Choi Beom Gyu Kim Sung Jun park In taik Chang Department of Surgery College of MedicineChung-Ang University

A desmoplastic small round cell tumor (DSRCT) is a rare, aggressive mesenchymal neoplasm. Although a DSRCT can develop at various sites, the intraabdominal site is the most common location. These tumors are found most commonly among young adolescents and the prognosis is extremely poor. Multimodal treatment with surgery, chemotherapy and radiotherapy is very important for these rare cases, and this treatment can improve patient survival. In this report, we describe the case of an 8-year-old boy diagnosed with DSRCT located in the retroperitoneal space. The patient has undergone surgical resection and adjuvant chemoradiation therapy, and is currently alive without disease recurrence.

关键词： Retroperitoneum Desmoplastic small round cell tumor Multimodal therapy

Transient bilateral total blindness after Falcotentorial meningioma operation by occipital bi-transtentorial approach

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Transient bilateral total blindness after Falcotentorial men...

Intrauterine midgut volvulus without malrotation:Diagnosis from the 'coffee bean sign'

中国抗癌协会神经肿瘤专业委员会第八届学术会议

作者： Jeong-taik Kwon Byoung Hun Lee Yong Sook park Department of Neurosurgery Chung-Ang University Hospital

Introduction Meningiomas arising at the falcotentorial junction are *** infratentorial supracerebellar approach and the occipital transtentorial approach are the main approaches used to reach lesions located in the pineal ***,these approach were limitation of fully exposure to bilaterally located *** presentation The 56 year-old female was admitted with headache and visual *** Magnetic resonance image（MRI） study,3.5 well definded midline mass in pineal *** signal intensity was checked owing to calcification and strong *** margin of the mass was internal cerebral vein and vein of Galen which the inferior margin of tumor was compressed by pineal gland mass on Digital Subtraction *** there was no *** the time of admission,there was no visual field deficit and Visual Evoked Potential was *** and CSF markers contribute to the diagnosis of pineal parenchymal tumors,βHCG and AFP were *** was operated by occipital bi-transtentorial approach that consisted of a bilateral（Right side dominant） occipital craniotomy exposing the torcula,superior sagittal sinus,and transverse *** of the tumor was firm and fibrotic mass with calcification,it was not pulled in one side after internal *** tumor was removed and we confirmed the structure of *** The patient well come out of anesthesia and there was no neurological deficits except in total *** does not percept to light and light reflex was *** used immediately steroid and checked *** MRI,the mass was well removed and there was a little blood in subdural space of bilateral occipital *** patient made remarkable improvement after 3 days from operation,Conclusion In the occipital bi-transtentorial approach is well exposed operation field and anatomical structure to *** major advantage of this approach is the better exposition relationship of the opposite mass margin

关键词： Pineal gland tumor Occipital transtentorial approach Falcotentorial meningioma

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World Journal of Gastroenterology 2008年第9期14卷 1456-1458页

作者： Jun Seok park Seong Jae Cha Beom Gyu Kim Yong Seok Kim Yoo Shin Choi In taik Chang Gwang Jun Kim Woo Seok Lee Gi Hyeon Kim Department of Surgery College of MedicineChung-Ang University Seoul 156-755Korea Department of Obstetrics and Gynecology College of Medicine Chung-Ang UniversityKorea Department of Radiology College of Medicine Chung-Ang University Seoul 156-755Korea

Fetal midgut volvulus is quite rare, and most cases are associated with abnormalities of intestinal rotation or fixation. We report a case of midgut volvulus without malrotation, associated with a meconium pellet, during the gestation period. This 2.79 kg, 33-wk infant was born via a spontaneous vaginal delivery caused by preterm labor. Prenatal ultrasound showed dilated bowel loops with the appearance of a 'coffee bean sign'. This patient had an unusual presentation with a distended abdomen showing skin discoloration. An emergency laparotomy revealed a midgut volvulus and a twisted small bowel, caused by complicated meconium ileus. Such nonspecific prenatal radiological signs and a low index of suspicion of a volvulus during gestation might delay appropriate surgical management and result in ischemic necrosis of the bowel. Preterm labor, specific prenatal sonographic findings (for example, the coffee bean sign) and bluish discoloration of the abdominal wall could suggest intrauterine midgut volvulus requiring prompt surgical intervention.

关键词： Midgut volvulus Coffee bean sign Meconium ileus