• 제목/요약/키워드: year-ring

검색결과 265건 처리시간 0.032초

강원도 양양 남대천에서 채집된 일본재첩, Corbicula (Corbicula) japonica Prime의 수산자원학적 연구 (Population Dynamics of Corbicula ( Corbicula) japonica Prime from Namdae Stream in Yangyang, Korea)

  • 권대현;강용주;김완기;이채성
    • 한국수산과학회지
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    • 제35권6호
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    • pp.686-695
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    • 2002
  • Samples of Corbicula ( Corbicula) japonica Prime of Namdae Stream in Gangnung were collected from November 2000 to October 2001. Age of C. (C.) japonica was determined from the rings on the shell, The shell length of the samples ranged from 8 mm to 38 mm. The ring on the shell was formed once a year in March. Von Bertalanffy's growth parameters were estimated using a nonlinear regression method, asyinptotie shell length ($L_{\omega}$) was 48,98 mm, K was 0.20421year, theoretical age at 0 shell length $(t_0)$ was 0.3169 year, and asymptotic total weight ($W_{\omega}$) was 41.37 g. The formula of allomeky between shell length (L, mm) and total weight (W, g) of the brackish water clam was W=3.42$\times$10^{-4}L^{3}. The annual survival rate was estimated at 0.3799, instantaneous coefficient of natural mortality was 0.5007/year, and instantaneous coefficient of fishing mortality was 0.46721year. The age at first capture was estimated at 2.1593 year using shell length compositions of the brackish water clam, The current yield-per-recruit at 0.4672/year of fishing mortality was 0.6595 g. F_0.1 was estimated at 0.1865/year, Acceptable biological catch was estimated at 14.4 metric ton.

Pulmonary Thromboembolism during Acetabular Fracture Operation

  • Seo, Il;Oh, Chang-Wug;Kim, Joon-Woo;Park, Kyeong-Hyun
    • Journal of Trauma and Injury
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    • 제31권2호
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    • pp.72-75
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    • 2018
  • Acetabular and Pelvic ring fractures are major high-energy trauma injuries and are often combined with other injuries. In particular, cause of long duration of immobilization and combined injuries, venous thromboembolism is a common complication in trauma patients with pelvic or acetabular fractures. We report a case of a fatal pulmonary thromboembolism during the acetabulum fracture operation in a 62-year-old male patient.

국한성 두경부 비호지킨스 림프종 환자에서의 다방면치료 (Multimodal Approaches in the Patients with Stage I,II Non-Hodgkin's Lymphoma of the Head and Neck)

  • 표홍렬;서창옥;김귀언;노재경
    • Radiation Oncology Journal
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    • 제13권2호
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    • pp.129-142
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    • 1995
  • Purpose: Traditionally the patients with early stage non-Hodgkin's lymphoma of the head and neck was treated with radiotherapy. But the results were not satisfactory due to distant relapse. Although combined treatment with radiotherapy and chemotherapy was tried with some improved results and chemotherapy alone was also tried in recent years, the choice of treatment for the patients with early stage non-Hodgkin's lymphoma of the head and neck has not been defined Therefore, in order to determine the optimum treatment method, we analysed retrospectively the outcomes of the patients with Ann Arbor stage I and II non-Hodgkin's lymphoma localized to the head and neck who were treated at Severance Hospital. Materials and Methods: 159 patients with stage I and II non-Hodgkin's lymphoma localized to the head and neck were treated at our hospital from January, 1979 to December, 1992. Of these patients, 114 patients whose primary sites were Waldeyer's ring or nodal region, and received prescribed radiation dose and/or more than 2 cycles of chemotherapy. were selected to analyze the outcomes according to the treatment methods ( radiotherapy alone, chemotherapy alone. and combined treatment with radiotherapy and chemotherapy ). Results: Five year overall actuarial survival of the patients whose Primary site was Waldeyer's ring was $62.5\%.$ and that of the Patients whose primary site was nodal region was $53.8\%$ There was no statistically significant difference between survivals of both groups. Initial response rate to radiotherapy. chemotherapy, and combined treatment was $92\%,\;83\%,\;94\%$ respectively, and 5 year relapse free survival was $49.9\%,\;52.4\%,\;58.5\%$ respectively ( statistically not significant ). In the patients with stage I. 3 year relapse free survival of chemotherapy alone group was $75\%$ and superior to other treatment groups. In the Patients with stage II, combined treatment group revealed the best result with $60.1\%$ of 3 year relapse free survival. The effect of sequential schedule of each treatment method in the Patients who were treated by combined modality was analyzed and the sequence of primary chemotherapy + radiotherapy + maintenance chemotherapy showed the best result ( 3 year relapse free survival was $79.1\%).$ There was no significant survival difference between BACOP regimen and CHOP regimen. Response to treatment was only one significant (p(0.005) prognostic factor on univariate analysis and age and mass size was marginally significant ( p(0.1). On multivariate analysis, age (p=0.026) and mass size (p=0.013) were significant prognostic factor for the relapse free survival. Conclusion: In summary, the patients who have non-Hodgkin's lymphoma of the head and neck with stage I and mass size smaller than 10 cm, can be treated by chemotherapy alone, but remainder should be treated by combined treatment method and the best combination schedule was the sequence of initial chemotherapy followed by radiotherapy and maintenance chemotherapy.

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대통령경호업무 경찰 이관에 대한 비판적 소고 (A Critical Review of the Transfer of Presidential Security Work to the Police)

  • 조성구
    • 시큐리티연구
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    • 제58호
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    • pp.177-194
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    • 2019
  • 문재인 정부에서는 대통령경호를 전담하는 대통령경호실을 폐지하고 경찰청 산하 대통령경호국을 신설하여 경호업무를 이관하려고 시도한 바 있다. 현재 G7국가들은 모두 경찰이 주도적으로 경호체제를 유지하고 있어 한국의 대통령 경호도 경찰청으로 업무를 이관하는 정책이 논의될 수 있으나 다음과 같은 현실에 집중할 필요가 있다. 첫째, 현재 대통령경호 체계는 (1)대통령경호처의 근접경호(Inner Ring), (2) 경찰의 중간 경호(Middle Ring) (3)수도방위사령부의 외곽경호(Outer Ring)로 구분된 중첩된 경호 조직을 구성하고 있는데 대통령경호처를 폐지하면 계층성의 원리에 공백이 발생하게 된다. 둘째, 현재 대통령의 효율적인 경호를 위해 「대통령경호안전대책위원회」에서는 대통경 경호처에서는 업무조정의 역할을 하고 있는데, 경찰청이 대통령경호의 컨트롤타워가 된다면 대통령경호업무의 군사적, 외교적 측면까지 지휘통제가 가능할 것인지도 고려되어야 할 부분이다. 셋째, 현재 한국은 북한과의 휴전중으로 앞서 설명한 영국, 독일, 프랑스, 일본 등의 G7 국가와는 안보환경에 큰 차이가 있다는 점이다.

소아 대장에서 발생한 전이성 반지세포암 1예 (A Case of Metastatic Signet Ring Cell Carcinoma of the Colon in a Child)

  • 오대성;한경희;신지연;심정옥;박지숙;양혜란;고재성;신희영;안효섭;박귀원;강경훈;천정은;김우선;서정기
    • Pediatric Gastroenterology, Hepatology & Nutrition
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    • 제10권1호
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    • pp.76-80
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    • 2007
  • 소아암에서 장관계 악성 종양 특히, 대장암은 극히 드문 질환이다. 그러나, 대장은 소아 장관계 상피세포암이 가장 호발하는 부위이며, 반지세포암은 성인과는 달리 소아 대장암 중에서 가장 흔한 조직형태 중 하나이다. 국내에서는 소아 대장에서 발생한 반지세포암에 대한 보고는 아직 없었다. 반지세포암은 점액이 세포내에 풍부하고 핵이 한쪽으로 치우쳐 있는 특징적 고리모양의 암 세포가 전체 암 세포의 50% 이상을 차지하는 조직 소견으로 진단된다. 저자들은 복통, 체중감소, 요통, 좌측 대퇴부 통증, 혈변으로 내원한 11세 남아에서 내시경 조직검사 소견으로 확진된 복강내 침습, 혈액 및 림프성 전이가 진행된 소아 대장에서의 전이성반지세포암을 경험하였기에 보고하는 바이다.

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Wiggle Matching for Radiocarbon Dating Korean Artifacts with Biannual Samples

  • Park, Won-Kyu;Nam, Tae-Kwang;Park, Jung-Hun;Hong, Wan
    • 한국가구학회지
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    • 제20권6호
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    • pp.605-611
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    • 2009
  • This paper reports the application of radiocarbon wiggle matching for Korean wooden artifacts such as furniture and Buddhist statues for precise dating. Ten biannual samples of 20 years (AD 1249-1268) for AMS (accelerator mass spectrometry) radiocarbon measurements were prepared from a board of the pedestal for Buddhist statue at Jeongsusa (temple) in Kangwhado, Korea, which was dendrochronologically dated. The average 95.4% confidence interval of radiocarbon dating without wiggle matching was 123 year. When wiggle matching technique was applied, it became 37 year, 3.3 times smaller than that without wiggle matching. The results indicated that wiggle matching technique using the calibration curve for northern hemisphere (IntCal04: International radiocarbon calibration curve announced in 2004) can produce precise dates for Korean wooden artifacts which possess as much as 20 tree rings.

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전장빈도분석에 의한 짱뚱어 Boleophthalmus pectinirostris 0세어의 성장 추정 (Growth Estimation of 0-Aged Blue Spot Mudskipper Boleophthalmus pectinirostris Using Length Frequency Data)

  • 김진구;정순재
    • 한국수산과학회지
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    • 제40권1호
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    • pp.50-52
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    • 2007
  • The growth of young-of-the-year blue spot mudskipper, Boleophthalmus pectinirostris, was investigated using length-frequency data for 395 individuals collected from a mud flat in southwestern Korea between August and October 2001. Three cohorts were separated by the Bhattacharya method. In October, individuals of cohort-I reached 98 mm in total length, whereas those of cohort-III reached just 66 mm. Each cohort reached hibernation in November, that could be related to the ring formation in the following year.

재발성 서혜부 탈장으로 오인된 지방모세포종 (Inguinal Lipoblastoma Mimicking Recurrent Inguinal Hernia)

  • 남소현;임윤정;김연미
    • Advances in pediatric surgery
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    • 제20권2호
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    • pp.58-61
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    • 2014
  • Palpable inguinal mass in children should be differentiated from inguinal hernia, hydrocele, lymph node, and tumor. Though using ultrasonography, fatty tumor would be misdiagnosed as incarcerated inguinal hernia containing fatty component. We experienced the huge inguinal lipoblastoma in 5-year-old girl mimicking recurrent incarcerated hernia. Laparoscopic exploration revealed it was not incarcerated hernia but well demarcated bulging mass from abdominal wall. Mass was about $10{\times}4{\times}3cm$ and extended from internal inguinal ring to saphenous opening. It was near total excised because of right external iliac vein injury. Pathologically, it was proven as lipoblastoma containing mature adipocyte with lipoblast and fibrous septa. Postoperatively, we noticed a segmental thrombotic occlusion of external iliac vein. After 1 year, she has no symptom related to occluded vessel. The remained lipoblastoma showed no interval change. Even lipoblastoma has a good prognosis with low recurrence rate, we need careful follow-up.

Cubital tunnel syndrome associated with previous ganglion cyst excision in the elbow: a case report

  • Woojin Shin;Taebyeong Kang;Jeongwoon Han
    • Clinics in Shoulder and Elbow
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    • 제27권1호
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    • pp.131-135
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    • 2024
  • Cubital tunnel syndrome refers to compression neuropathy caused by pressure on the ulnar nerve pathway around the elbow. A 63-year-old male patient visited the clinic complaining of decreased sensation and weakness in his left ring finger and little finger, stating that the symptoms first began 6 months prior. He had undergone surgery to remove a ganglion cyst from his left elbow joint about 5 years prior in Mongolia. Magnetic resonance imaging revealed a cystic mass located at the previous surgical site, which was compressing the ulnar nerve within the cubital tunnel. Ulnar nerve decompression and anterior transposition were performed, and the cystic mass was excised. Upon pathological examination, the mass was diagnosed as a ganglion cyst. The patient's symptoms including sensory dysfunction and weakness improved over the 1-year follow-up period. This report describes a rare case of ganglion cyst recurrence compressing the ulnar nerve in the cubital tunnel after previous ganglion cyst excision.

Perioperative Epirubicin, Oxaliplatin, and Capecitabine Chemotherapy in Locally Advanced Gastric Cancer: Safety and Feasibility in an Interim Survival Analysis

  • Ostwal, Vikas;Sahu, Arvind;Ramaswamy, Anant;Sirohi, Bhawna;Bose, Subhadeep;Talreja, Vikas;Goel, Mahesh;Patkar, Shraddha;Desouza, Ashwin;Shrikhande, Shailesh V.
    • Journal of Gastric Cancer
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    • 제17권1호
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    • pp.21-32
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    • 2017
  • Purpose: Perioperative chemotherapy improves survival outcomes in locally advanced (LA) gastric cancer. Materials and Methods: We retrospectively analyzed patients with LA gastric cancer who were offered perioperative chemotherapy consisting of epirubicin, oxaliplatin, and capecitabine (EOX) from May 2013 to December 2015 at Tata Memorial Hospital in Mumbai. Results: Among the 268 consecutive patients in our study, 260 patients (97.0%) completed neoadjuvant chemotherapy, 200 patients (74.6%) underwent D2 lymphadenectomy, and 178 patients (66.4%) completed adjuvant chemotherapy. The median follow-up period was 17 months. For the entire cohort, the median overall survival (OS), 3-year OS rate, median progression-free survival (PFS), and 3-year PFS rate were 37 months, 64.4%, 31 months, and 40%, respectively. PFS and OS were significantly inferior in patients who presented with features of obstruction than in those who did not (P=0.0001). There was no difference in survival with respect to tumor histology (well to moderately differentiated vs. poorly differentiated, signet ring vs. non-signet ring histology) or location (proximal vs. distal). Survival was prolonged in patients with an early pathological T stage and a pathological node-negative status. In a multivariate analysis, postoperative pathological nodal status and gastric outlet obstruction on presentation significantly correlated with survival. Conclusions: EOX chemotherapy with curative resection and D2 lymphadenectomy is a suggested alternative to the existing perioperative regimens. The acceptable postoperative complication rate and relatively high resections, chemotherapy completion, and survival rates obtained in this study require further evaluation and validation in a clinical trial.