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A parametric study of optimum tall piers for railway bridge viaducts
Martinez-Martin, Francisco J.,Gonzalez-Vidosa, Fernando,Hospitaler, Antonio,Yepes, Victor Techno-Press 2013 Structural Engineering and Mechanics, An Int'l Jou Vol.45 No.6
This paper presents a parametric study of reinforced concrete bridge tall piers with hollow, rectangular sections. Such piers are typically used in railway construction of prestressed concrete viaducts. Twenty one different piers have been studied with seven column heights of 40, 50, 60, 70, 80, 90 and 100 m and three types of 10-span continuous viaducts, whose main span lengths are 40, 50 and 60 m. The piers studied are intermediate columns placed in the middle of the viaducts. The total number of optimization design variables varies from 139 for piers with column height of 40 m to 307 for piers with column height of 100 m. Further, the results presented are of much value for the preliminary design of the piers of prestressed concrete viaducts of high speed railway lines.
A parametric study of optimum tall piers for railway bridge viaducts
Francisco J. Martínez-Martín,Fernando González-Vidosa,Antonio Hospitaler,Víctor Yepes 국제구조공학회 2013 Structural Engineering and Mechanics, An Int'l Jou Vol.45 No.6
This paper presents a parametric study of reinforced concrete bridge tall piers with hollow, rectangular sections. Such piers are typically used in railway construction of prestressed concrete viaducts. Twenty one different piers have been studied with seven column heights of 40, 50, 60, 70, 80, 90 and 100 m and three types of 10-span continuous viaducts, whose main span lengths are 40, 50 and 60 m. The piers studied are intermediate columns placed in the middle of the viaducts. The total number of optimization design variables varies from 139 for piers with column height of 40 m to 307 for piers with column height of 100 m. Further, the results presented are of much value for the preliminary design of the piers of prestressed concrete viaducts of high speed railway lines.
꽃마을한방병원(Conmaul Hospital),조준영(Jun young Jo) 대한모유수유한의학회 2015 대한모유수유한의학회지 Vol.1 No.1
Objectives: The purpose of this study is to present of a woman treated Korean herbal medicine (KHM) for suppression of lactation. Methods: A patient was treated by KHM for suppression of lactation for 10 days. Results: She reported that her breastmilk production decreased after taking KHM with no adverse effects. Conclusions: KHM could be a option for suppression of lactation. Further studies are needed to confirm the effects and safety of KHM for suppression of lactation.
Pheochromocytoma Presenting with Multiple Cardiovascular Manifestations
Yu Na Kim,Cheol Woong Yu,Young Soo Oh 이화여자대학교 의과학연구소 2014 EMJ (Ewha medical journal) Vol.37 No.2
Iintroduction 1 Case 1 Discussion 4 References 5
Departments of Surgery,<SUP>1<.SUP>Hospital Pathology,The Catholic University of Korea,Seoul,Korea 대한갑상선-내분비외과학회 2012 The Koreran journal of Endocrine Surgery Vol.12 No.4
Purpose: The rate of malignancy in the follicular neoplasm (FN) or Hürthle cell neoplasm (HCN) of the thyroid gland is estimated as approximately 20∼30%. Fine-needle aspiration biopsy (FNAB) and frozen section examination are restricted in differentiating between benign and malignant. The aims of this study are to compare the differences of clinicopathologic features and to determine the risk factors for malignancy in patients with FN or HCN. Methods: A retrospective study was conducted of patients with FN or HCN who were diagnosed by FNAB, and underwent surgery at our institution between Jan. 2005 to Jun. 2010. We analyzed the risk factors for malignancy and the differences of clinicopathologic features in patients with FN or HCN. Results: A total of 290 patients were enrolledin this study; 160 (55.2%) patients underwent thyroidectomy, 97 (60.6%) patients had FN, and 63 (39.4%) had HCN. Forty one (25.6%) patients were diagnosed as malignancy of these, 22 (22.7%) patients were FN and 19 (30.2%) were HCN (P=0.29). Two (2.1%) patients with FN and 10 (15.9%) with HCN (P=0.002) comcomitant papillary thyroid carcinoma were indentified by FNAB. Classification of nodules according to ultrasonographic findings in both neoplasms (P<0.05) and galectin-3 in FN (P<0.05) were predictive factors for malignancy. In addition, galectin-3 was a predictive factor for malignancy in indeterminate nodules on ultrasonography (USG) (P=0.028). Conclusion: Classification of nodules according to ultrasonographic findings and galectin-3 expression is helpful in predicting carcinoma of patients with FN or HCN.
Chronic Spinal Epidural Abscess after Epidural Analgesia - Case Report -
, M.D.(),, M.D.(),, M.D.(Chonbuk National University Medical School Hospital),Tai Ki Yang,Keun Su Kim,Jung Chung Lee 대한신경외과학회 2003 Journal of Korean neurosurgical society Vol.33 No.6
Three cases of chronic spinal epidural abscess following spinal epidural analgesia are presented. Spinal epidural abscess is a relatively rare infectious disease. It has recently increased in frequency due to the increased use of epidural steroid injections and epidural analgesia. It is very difficult to detect the spinal epidural abscess from its variable symptoms. So, it is important in making a diagnosis of epidural abscess to take into account the previous history of epidural analgesia. Key words:Spinal epidural abscess;Epidural analgesia.
Cortical Trajectory Screw Fixation in Lumbar Spine Surgery: A Review of the Existing Literature
Kim Kun-Tae,Song Myung-Geun,Park Young-Jin,Lee Dong-Yeong,Gyeongsang National University Hospital 대한척추외과학회 2022 Asian Spine Journal Vol.16 No.1
Posterior lumbar fusion is a safe and effective surgical method for diseases, such as lumbar stenosis, spondylolisthesis, lumbar instability, spinal deformity, and tumor. Pedicle screw (PS) fixation was first introduced by Bouche and has been adopted as the gold standard for posterior lumbar fusion. Santoni and colleagues introduced a new methodological screw insertion technique that uses a cortical bone trajectory (CBT), described as that from a medial to lateral path in the transverse axial plane and caudal to the cephalad path in the sagittal plane through the pedicle for maximum contact of the screw with the cortical bone. Owing to the lower invasiveness, superior cortical bone contact, and reduced neurovascular injury incidence, the CBT technique has been widely used in posterior lumbar fusion; however, these advantages have not been proven in clinical/radiological and biomechanical studies. We designed the present study to review the existing evidence and evaluate the merit of CBT screw fixation. Six electronic databases were searched for relevant articles published in August 2020 using the search terms “cortical bone trajectory,” “CBT spine,” “CBT fixation,” “cortical pedicle screws,” and “cortical screws.” Studies were analyzed and divided into the following groups: “biomechanics investigation,” “surgical technique,” and “clinical/radiological studies.” Most studies compared CBT and PS fixation, and the CBT screw fixation method showed better or similar outcomes.
Coeliac Disease-Associated Antibodies in Psoriasis
Sabiye Akbulut,Engin Senel,Günes Gür,Firdevs Topal,Fatih Esad Topal,Department of Gastroenterology, Medicana International Hospital, Anka,Nuran Alli 대한피부과학회 2013 Annals of Dermatology Vol.25 No.3
Background: The possible relationship between psoriasis and coeliac disease (CD) has been attributed to the common pathogenic mechanisms of the two diseases and the presence of antigliadin antibodies in patients has been reported to increase the incidence of CD. Objective: The aim of this report was to study CD-associated antibodies serum antigliadin antibody immunoglobulin (Ig)A, IgG, anti-endomysial antibody IgA and anti-transglutaminase antibody IgA and to demonstrate whether there is an increase in the frequency of those markers of CD in patients with psoriasis. Methods: Serum antigliadin antibody IgG and IgA, antiendomysial antibody IgA and anti-transglutaminase antibody IgA were studied in 37 (19 males) patients with psoriasis and 50 (23 males) healthy controls. Upper gastrointestinal endoscopy and duodenal biopsies were performed in patients with at least one positive marker. Results: Antigliadin IgA was statistically higher in the psoriasis group than in the controls (p<0.05). Serological markers were found positive in 6patients with psoriasis and 1 person from the control group. Upper gastrointestinal endoscopy was performed in all these persons, with biopsies collected from the duodenum. The diagnosis of CD was reported in only one patient with psoriasis following the pathological examination of the biopsies. Whereas one person of the control group was found to be positive for antigliadin antibody IgA, pathological examination of the duodenal biopsies obtain from this patient were found to be normal. Conclusion: Antigliadin IgA prominently increases in patients diagnosed with psoriasis. Patients with psoriasis should be investigated for latent CD and should be followed up.