2.A Case of Tracheopathia Osteoplastica.
Chang Ho KIM ; Tae Kyung KANG ; Ki Soo PARK ; Jae Yong PARK ; Tae Hoon JUNG ; Kyung Soo BAE ; Duk Sik KANG ; Sang Han LEE ; Jyung Sik KWAK
Tuberculosis and Respiratory Diseases 1996;43(2):257-261
Tracheopathia osteoplastica is a rare disease characterized by submucosal cartilaginous or bony projections into tracheobroncheal lumen with sparing of the posterior membranous portion of tracheobroncheal tree. The cause of this disorder is unknown. In the past, a majority of the cases were discovered incidentally at autopsy. But recently, antemortem diagnosis is increasingly reported after the introduction of computed tomography and bronchoscopy. We report a case of extensive tracheopathia osteoplastica diagnosed antemortem by computed tomography, bronchoscopic examination and biopsy.
Autopsy
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Biopsy
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Bronchoscopy
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Diagnosis
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Rare Diseases
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Trees
3.Tree-in-Bud Pattern of Pulmonary Tuberculosis on Thin-Section CT: Pathological Implications.
Korean Journal of Radiology 2018;19(5):859-865
The “tree-in-bud-pattern” of images on thin-section lung CT is defined by centrilobular branching structures that resemble a budding tree. We investigated the pathological basis of the tree-in-bud lesion by reviewing the pathological specimens of bronchograms of normal lungs and contract radiographs of the post-mortem lungs manifesting active pulmonary tuberculosis. The tree portion corresponds to the intralobular inflammatory bronchiole, while the bud portion represents filling of inflammatory substances within alveolar ducts, which are larger than the corresponding bronchioles. Inflammatory bronchiole per se represents the “tree” (stem) and inflammatory alveolar ducts constitute the “buds” or clubbing. “Clusters of micronodules”, seen on 7-mm thick post-mortem radiographs with tuberculosis proved to be clusters of tree-in-bud lesions within the three-dimensional space of secondary pulmonary lobule based on radiological/pathological correlation. None of the post-mortem lung specimens showed findings of lung parenchymal lymphatics involvement.
Bronchioles
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Lung
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Trees
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Tuberculosis
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Tuberculosis, Pulmonary*
4.ECG arrhythmia classification using time frequency distribution techniques.
Safa SULTAN QURRAIE ; Rashid GHORBANI AFKHAMI
Biomedical Engineering Letters 2017;7(4):325-332
In this paper, we focus on classifying cardiac arrhythmias. The MIT-BIH database is used with 14 original classes of labeling which is then mapped into 5 more general classes, using the Association for the Advancement of Medical Instrumentation standard. Three types of features were selected with a focus on the time-frequency aspects of ECG signal. After using the Wigner-Ville distribution the time-frequency plane is split into 9 windows considering the frequency bandwidth and time duration of ECG segments and peaks. The summation over these windows are employed as pseudo-energy features in classification. The “subject-oriented” scheme is used in classification, meaning the train and test sets include samples from different subjects. The subject-oriented method avoids the possible overfitting issues and guaranties the authenticity of the classification. The overall sensitivity and positive predictivity of classification is 99.67 and 98.92%, respectively, which shows a significant improvement over previous studies.
Arrhythmias, Cardiac*
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Classification*
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Decision Trees
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Electrocardiography*
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Methods
5.Application of Decision Tree for the Classification of Antimicrobial Peptide.
Su Yeon LEE ; Sunkyu KIM ; Sukwon S KIM ; Seon Jeong CHA ; Young Keun KWON ; Byung Ro MOON ; Byeong Jae LEE
Genomics & Informatics 2004;2(3):121-125
The purpose of this study was to investigate the use of decision tree for the classification of antimicrobial peptides. The classification was based on the activities of known antimicrobial peptides against common microbes including Escherichia coli and Staphylococcus aureus. A feature selection was employed to select an effective subset of features from available attribute sets.Sequential applications of decision tree with 17 nodes with 9 leaves and 13 nodes with 7 leaves provided the classification rates of 76.74% and 74.66% against E. coli and S. aureus, respectively. Angle subtended by positively charged face and the positive charge commonly gave higher accuracies in both E. coli and S. aureus datasets. In this study, we describe a successful application of decision tree that provides the understanding of the effects of physicochemical characteristics of peptides on bacterial membrane.
Classification*
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Dataset
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Decision Trees*
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Escherichia coli
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Membranes
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Peptides
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Staphylococcus aureus
6.Measurement and Modeling of Job Stress of Electric Overhead Traveling Crane Operators.
Obilisetty B KRISHNA ; Jhareswar MAITI ; Pradip K RAY ; Biswajit SAMANTA ; Saptarshi MANDAL ; Sobhan SARKAR
Safety and Health at Work 2015;6(4):279-288
BACKGROUND: In this study, the measurement of job stress of electric overhead traveling crane operators and quantification of the effects of operator and workplace characteristics on job stress were assessed. METHODS: Job stress was measured on five subscales: employee empowerment, role overload, role ambiguity, rule violation, and job hazard. The characteristics of the operators that were studied were age, experience, body weight, and body height. The workplace characteristics considered were hours of exposure, cabin type, cabin feature, and crane height. The proposed methodology included administration of a questionnaire survey to 76 electric overhead traveling crane operators followed by analysis using analysis of variance and a classification and regression tree. RESULTS: The key findings were: (1) the five subscales can be used to measure job stress; (2) employee empowerment was the most significant factor followed by the role overload; (3) workplace characteristics contributed more towards job stress than operator's characteristics; and (4) of the workplace characteristics, crane height was the major contributor CONCLUSION: The issues related to crane height and cabin feature can be fixed by providing engineering or foolproof solutions than relying on interventions related to the demographic factors.
Body Height
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Body Weight
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Classification
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Demography
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Power (Psychology)
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Trees
7.Two-Step Incision for Periarterial Sympathectomy of the Hand.
Seung Bae JEON ; Hee Chang AHN ; Yong Su AHN ; Matthew Seung Suk CHOI
Archives of Plastic Surgery 2015;42(6):761-768
BACKGROUND: Surgical scars on the palmar surface of the hand may lead to functional and also aesthetic and psychological consequences. The objective of this study was to introduce a new incision technique for periarterial sympathectomy of the hand and to compare the results of the new two-step incision technique with those of a Koman incision by using an objective questionnaire. METHODS: A total of 40 patients (17 men and 23 women) with intractable Raynaud's disease or syndrome underwent surgery in our hospital, conducted by a single surgeon, between January 2008 and January 2013. Patients who had undergone extended sympathectomy or vessel graft were excluded. Clinical evaluation of postoperative scars was performed in both groups one year after surgery using the patient and observer scar assessment scale (POSAS) and the Wake Forest University rating scale. RESULTS: The total patient score was 8.59 (range, 6-15) in the two-step incision group and 9.62 (range, 7-18) in the Koman incision group. A significant difference was found between the groups in the total PS score (P-value=0.034) but not in the total observer score. Our analysis found no significant difference in preoperative and postoperative Wake Forest University rating scale scores between the two-step and Koman incision groups. The time required for recovery prior to returning to work after surgery was shorter in the two-step incision group, with a mean of 29.48 days in the two-step incision group and 34.15 days in the Koman incision group (P=0.03). CONCLUSIONS: Compared to the Koman incision, the new two-step incision technique provides better aesthetic results, similar symptom improvement, and a reduction in the recovery time required before returning to work. Furthermore, this incision allows the surgeon to access a wide surgical field and a sufficient exposure of anatomical structures.
Cicatrix
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Hand*
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Humans
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Male
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Raynaud Disease
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Sympathectomy*
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Transplants
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Trees
8.Effects of Phytoncides Inhalation on Serum Cortisol Level and Life Stress of College Students.
Journal of Korean Academy of Adult Nursing 2008;20(5):697-706
PURPOSE: The purpose of this study was to identify the effects of the phytoncides on serum cortisol level, vital signs and life stress of college students. METHODS: This study was nonequivalent control group non-synchronized design. The subjects consisted of 60(control group: 28, experimental group: 32). The phytoncides mixed the pine(pinus sylvestris) oil with the cypress(cupressus sempervirens) oil in the same rate. In the experiment, it was put in an aroma-necklace bottle and inhaled 3 times per day(9AM, at noon, before going to bed) for 2 weeks. The data were analyzed by the SPSS version 12.0 program. RESULTS: In the experimental group systolic BP(F=15.603, p=.000), diastolic BP(F=29.489, p=.000) and serum cortisol level(F=4.968, p=.000) were significantly decreased. CONCLUSION: The phytoncides inhalation is a partly help to reduce college students' life stress. The phytoncides is the incense of the familial tree. We recommended to examine what differences between the green shower and the phytoncides inhalation for the stress reduction.
Humans
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Hydrocortisone
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Inhalation
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Stress, Psychological
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Trees
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Vital Signs
9.Depositional characteristics of atmospheric polybrominated diphenyl ethers on tree barks.
Environmental Health and Toxicology 2014;29(1):e2014003-
OBJECTIVES: This study was conducted to determine the depositional characteristics of several tree barks, including Ginkgo (Ginkgo biloba), Pine (Pinus densiflora), Platanus (Platanus), and Metasequoia (Metasequoia glyptostroboides). These were used as passive air sampler (PAS) of atmospheric polybrominated diphenyl ethers (PBDEs). METHODS: Tree barks were sampled from the same site. PBDEs were analyzed by highresolution gas chromatography/high-resolution mass spectrometer, and the lipid content was measured using the gravimetric method by n-hexane extraction. RESULTS: Gingko contained the highest lipid content (7.82 mg/g dry), whereas pine (4.85 mg/g dry), Platanus (3.61 mg/g dry), and Metasequoia (0.97 mg/g dry) had relatively lower content. The highest total PBDEs concentration was observed in Metasequoia (83,159.0 pg/g dry), followed by Ginkgo (53,538.4 pg/g dry), Pine (20,266.4 pg/g dry), and Platanus (12,572.0 pg/g dry). There were poor correlations between lipid content and total PBDE concentrations in tree barks (R2=0.1011, p =0.682). Among the PBDE congeners, BDE 206, 207 and 209 were highly brominated PBDEs that are sorbed to particulates in ambient air, which accounted for 90.5% (84.3-95.6%) of the concentration and were therefore identified as the main PBDE congener. The concentrations of particulate PBDEs deposited on tree barks were dependent on morphological characteristics such as surface area or roughness of barks. CONCLUSIONS: Therefore, when using the tree barks as the PAS of the atmospheric PBDEs, samples belonging to same tree species should be collected to reduce errors and to obtain reliable data.
Ginkgo biloba
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Halogenated Diphenyl Ethers*
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Plant Bark*
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Trees
10.Psychological Distress and Drawing Tests among Women with Breast Cancer.
Jiyeon KIM ; Soyoung YOUN ; Byeongil CHOI ; Kyung Hae JUNG ; Seung Do AHN ; Sook Yeon HWANG ; Seockhoon CHUNG ; Jaedam LEE
Journal of Korean Medical Science 2018;33(17):e140-
BACKGROUND: The aim of this study was to evaluate the use of the Diagnostic Drawing Series (DDS) as a screening tool for the breast cancer patients with psychological distress. METHODS: All of 64 patients with breast cancer participated in this study. Patients' depressive and anxiety symptoms were assessed using Patient Health Questionnaire-9 (PHQ-9) and Generalized Anxiety Disorder-7 (GAD-7) when the DDS was applied to the partipicants. RESULTS: Depressed patients used more enclosure in the Feeling drawings (P = 0.002) and tilt in Free drawings (P = 0.048). Patients with anxiety drew a picture over 67% of the paper (P = 0.015) in Tree drawing and more medium pressure (P = 0.049) in Feeling drawings. Thirty four subjects (77.3%) of unstable emotion group used over 67% of the space (P = 0.002). More Landscapes were observed in the Feeling drawings of unstable patients (P = 0.042). CONCLUSION: These results suggested that DDS could be used as a supplemental screening tool for psychological distress in breast cancer patients.
Anxiety
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Breast Neoplasms*
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Breast*
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Depression
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Female
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Humans
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Mass Screening
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Trees