• ETRI Journal
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• 제42권5호
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• pp.643-657
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• 2020

Sixth generation will exploit satellite, aerial, and terrestrial platforms jointly to improve radio access capability and unlock the support of on-demand edge cloud services in three-dimensional (3D) space, by incorporating mobile edge computing (MEC) functionalities on aerial platforms and low-orbit satellites. This will extend the MEC support to devices and network elements in the sky and forge a space-borne MEC, enabling intelligent, personalized, and distributed on-demand services. End users will experience the impression of being surrounded by a distributed computer, fulfilling their requests with apparently zero latency. In this paper, we consider an architecture that provides communication, computation, and caching (C3) services on demand, anytime, and everywhere in 3D space, integrating conventional ground (terrestrial) base stations and flying (non-terrestrial) nodes. Given the complexity of the overall network, the C3 resources and management of aerial devices need to be jointly orchestrated via artificial intelligence-based algorithms, exploiting virtualized network functions dynamically deployed in a distributed manner across terrestrial and non-terrestrial nodes.

• 사상체질의학회지
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• 제30권3호
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• pp.48-61
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• 2018

Objectives The purpose of this study was to investigate the ordinary symptoms, special symptoms and Body Mass Index (BMI) according to Sasang constitution in female college students. Also, we aimed to analyze the factors affecting BMI. Methods Forty-four female college students participated in this study. Sasang Constitution was determined by Questionnaire for Sasang Constitution Classification (QSCC) II. BMI was measured and ordinary symptoms were acqired through the questionnaire. Special symptoms was determined by Fatigue Severity Index (FSS), Premenstrual Symptom Screening Tool (PSST), ROME III, Ocular Surface Disease Index (OSDI), respectively. For statistical analysis, t-test, analysis of variance and correlation test has been used. Results There existed significant differences in ordinary symptoms and special symptoms between sasang constitutions. Taeumin had higher urine frequency than soyangin, soeumin had higher gap of feces than taeumin. Taeumin had higher BMI and ROME III score than soyangin and soeumin. They showed significant differences in ordinary symptoms and special symptoms according to BMI. Overweight and obese group is higher in water intake than low and normal group. Low weight and normal group is higher in gap of feces than overweight and obese group. High score group in PSST and ROME III showed high BMI than low score group. We analyzed the factors that affect BMI. BMI are highly correlated with systolic and diastolic blood pressure. Also, FSS, PSST, ROME III and OSDI showed high correlation with each other. Conclusion Urine frequency and gap of feces are different among sasang constitutional types. The obese group and normal group showed significant differences in water intake, gap of feces, PSST and ROME III score. It is found that factors that affecting BMI are systolic and diastolic blood pressure. These results may lead to identifying the causes and factors of obesity in female college students related to Sasang constitution.

• Safety and Health at Work
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• 제9권3호
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• pp.265-276
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• 2018

Background: Resilience engineering is a paradigm for safety management that focuses on coping with complexity to achieve success, even considering several conflicting goals. Modern sociotechnical systems have to be resilient to comply with the variability of everyday activities, the tight-coupled and under-specified nature of work, and the nonlinear interactions among agents. At organizational level, resilience can be described as a combination of four cornerstones: monitoring, responding, learning, and anticipating. Methods: Starting from these four categories, this article aims at defining a semiquantitative analytic framework to measure organizational resilience in complex sociotechnical systems, combining the resilience analysis grid and the analytic hierarchy process. Results: This article presents an approach for defining resilience abilities of an organization, creating a structured domain-dependent framework to define a resilience profile at different levels of abstraction, and identifying weaknesses and strengths of the system and potential actions to increase system's adaptive capacity. An illustrative example in an anesthesia department clarifies the outcomes of the approach. Conclusion: The outcome of the resilience analysis grid, i.e., a weighed set of probing questions, can be used in different domains, as a support tool in a wider Safety-II oriented managerial action to bring safety management into the core business of the organization.

• Annals of Coloproctology
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• 제34권6호
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• pp.317-321
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• 2018

Purpose: We evaluate the role of transanal tube drainage (TD) as a conservative treatment for patients with anastomotic leakage (AL). Methods: Patients treated for AL who had undergone a low or an ultralow anterior resection with colorectal or coloanal anastomosis for the treatment of rectal cancer between January 2013 and January 2017 were enrolled in this study. The data were collected prospectively and analyzed retrospectively. The primary outcomes were the diagnosis and the management of AL. Results: Two hundred thirteen consecutive patients, 122 males and 91 females, were included. The mean age was $66.91{\pm}11.15years$, and the median body mass index was $24kg/m^2$ (range, $20-35kg/m^2$). The median tumor distance from the anal verge was 8 cm (range, 4-12 cm). Ninety-three patients (44%) received neoadjuvant therapy for nodal disease and/or locally advanced rectal cancer. Only 13 patients (6%) developed AL. Six patients developed subclinical AL as they had a defunctioning ileostomy at the time of the initial procedure. They were treated conservatively with TD under endoscopic guidance in the endoscopy unit and received intravenous antibiotics. Six weeks after discharge, these 6 patients underwent follow-up flexible sigmoidoscopy which showed a completely healed anastomotic defect with no residual stenosis. Seven patients developed a clinically significant AL and required reoperation with pelvic abscess drainage and Hartmann colostomy formation. Conclusion: These results suggest that TD for management of patients with AL is safe, cheap, and effective. Salvaging the anastomosis will help decrease the need for Hartmann colostomy formation. Proper patient selection is important.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제25권5호
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• pp.376-386
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• 2022

Functional gastrointestinal disorders (FGIDs) are classified as a combination of persistent gastrointestinal symptoms. The Rome IV criteria can elucidate several factors in the pathogenesis of FGIDs. The frequency of FGIDs can differ between clinical and nonclinical settings and between geographic regions. To determine the global prevalence of FGIDs in neonates and toddlers according to the Rome IV criteria. We included cohort and descriptive observational studies reporting the prevalence of FGIDs according to the Rome IV criteria in children aged 0-48 months. We searched the Medline, Embase, Lilacs, and CENTRAL databases from May 2016 to the present day. Furthermore, unpublished literature was searched to supplement this information. The Strengthening the Reporting of Observational Studies in Epidemiology statement was used to evaluate the risk of bias. A meta-analysis of the proportions was performed using MetaProp in R. The results are reported in forest plots. We identified and analyzed 15 studies comprising 48,325 participants. Six studies were conducted in Europe, three in Latin America, two in North America, and four in Asia. Most participants were 12-48 months old (61.0%) and were recruited from the community. The global prevalence of FGIDs was 22.0% (95% confidence interval, 15-31%). The most common disorder was functional constipation (9.0%), followed by infant regurgitation syndrome (8.0%). Its prevalence was higher in the Americas (28.0%). FGIDs, as defined by the Rome IV criteria, are present in 22% of children, and the most common primary disorder is functional constipation. A higher prevalence of FGIDs has been reported in America.

• Advances in aircraft and spacecraft science
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• 제9권5호
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• pp.479-491
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• 2022

This work concerns the investigation of a Q1D methodology employed to study pressure oscillations in solid rocket motors driven by hydrodynamic instabilities. A laboratory-scale solid motor designed to develop vortex-shedding phenomena is analyzed for the whole firing time. The comparison between numerical results and experimental data shows good agreement regarding pressure oscillations signature, especially in the flute-mode behavior, the typical oscillations frequency trend present in any motor liable to hydrodynamic instabilities. Such result ensures the model capability to cope with this particular kind of pressure oscillations source, allowing the investigation of the phenomenon with a lighter and cost savings methodology than CFD simulations.

• 발명특허
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• 제9권10호통권104호
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• pp.21-21
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• 1984

• 대한한방소아과학회지
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• 제28권1호
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• pp.32-42
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• 2014

Objectives The purpose of this study is to establish relationship between allergic diseases and functional gastrointestinal disorders in children and adolescents using objective criteria and questionnaires. Methods This study surveyed 237 children and adolescents who visited the department of Pediatrics of ${\bigcirc}{\bigcirc}$ Korean Medicine Hospital from September 23rd, 2013 to December 26th, 2013. The Korean version of International Study of Asthma and Allergies in Childhood (ISAAC) questionnaire and the Korean-translated Questionnaire on Pediatric Gastrointestinal Symptoms-Rome III (QPGS-Rome III) were used. We analyzed the data by using PASW Statistics 18.0 with Chi-square test, Fisher's exact test and Linear by linear association. Results There was no significant difference between prevalence of allergic diseases and functional gastrointestinal disorders. Also, there was no strong relationship between the number of allergic diseases and the functional gastrointestinal disorders. However, some parts showed significant relationships - such as asthma symptoms ever and belch; asthma symptoms last 12 months and belch; allergic rhinitis diagnosis ever and belly aches and abdominal pain around and below the belly button; allergic rhinitis treatment last 12 months and belly aches and abdominal pain around and below the belly button; and atopic dermatitis diagnosis ever and irritable bowel syndrome (respectively; p=0.046, p=0.008, p=0.004, p=0.029, p=0.035). And as the number of allergic diseases increases, the prevalence of functional gastrointestinal disorders are 19.4%, 31.3%, 41.7%, 31.0% respectively. Conclusions Although there was no significant relationship between allergic diseases and functional gastrointestinal disorders, some gastrointestinal symptoms were related to allergic diseases.

• 대한한방소아과학회지
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• 제29권1호
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• pp.60-68
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• 2015

Objectives The purpose of this study is to establish relationship between functional gastrointestinal disorders in children and Temperament and Character using objective criteria and questionnaires. Methods This study surveyed 3-6 years old 130 children who were attending the kindergarten or daycare center in the vicinity of Gangdong from May 15th, 2014 to November 30th, 2014. The Korean-translated Questionnaire on Pediatric Gastrointestinal Symptoms-Rome III (QPGS-Rome III) and The Junior Temperament and Character Inventory 3-6 (JTCI 3-6) questionnaires were used. Results 1. Between the groups, functional gastrointestinal disorder group scored significantly higher on NS, NS1, NS4, HA4, ST and ST1. 2. As the number of functional gastrointestinal disorders increase, the group scored higher on NS, NS1, NS4, HA4, ST and ST1. Conclusions This study showed functional gastrointestinal disorder group exhibited higher NS, NS1, NS4, HA4, ST and ST1 scores.

• 건축역사연구
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• 제11권3호
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• pp.69-86
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• 2002

Under the assumption that techniques of interior decoration often frequently used by people of the antique Greece and Rome became basis for scientific perspective in the period of Renaissance, this study analyzed characteristics of wall paintings excavated as relics of the antique Greece and Rome. The result of the study can be summarized as follows ; (1) Decorative wall paintings which were and have been excavated from relics of the antique Roman cities are characterized by single and multiple point techniques as their perspective. The two techniques were later adapted by people of the Baroque in the 16th century who recognized and expressed space through putting it into a certain framework. (2) Such antique wall paintings drawn using the technique of single point clearly indicate that the technique was not fully created in the period of Renaissance but developed by people of the antique Greece and Rome. Unlike its present form, the technique was unsophisticated and poor in many respects when first created. Since then, it has become manipulated as spatial recognition has been developed in various ways. (3) Illustrations on vase surfaces or wall-decorative painting panels of the antique Greece were painted mainly through the technique of multiple points which helped changes in the sense of space. The technique were later complied with by the theory of cubism which was emerged in the late 19th century. In other words, the technique was developed over times into a basis of the theory. (4) Some of the antique Roman and Greek wall paintings were drawn by using the method of single point perspective. When the height of the wall foundation, 90cm, as specified in [Ten Books of Architecture] by Vitrubius, the viewpoint for the method almost complied with the height of spectators' view, or 150cm. This height is almost same as the height of the view point employed by wall paintings in the Renaissance period.