• 수산해양기술연구
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• 제54권2호
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• pp.173-180
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• 2018

Marine casualties of small fishing vessels (SFV) of less than 20 tons are frequent in Korea. The analysis was conducted to identify the cause and then prepared reduction plan using the marine casualty statistics of fishing vessels for the last five years from 2012 to 2016 by the Korean Maritime Safety Tribunal to reduce the marine casualties of SFV. According to the analysis of the type of whole vessels occurring marine casualty, fishing vessels accounted for an average 68.0 %; moreover, except for 2014 when M/V SEWOL ferry capsizing occurred, the rate of death and missing due to marine casualties occurred from 68.3 % to 91.2 % in fishing vessels, and an average 79.5 % was found to be urgent need of a measure. Marine casualties occurrence depending on the gross tonnage of fishing vessel was found that the most occurred at less than 5 tons, followed by the order of 5 to 10 tons or less. However, crews who boarded on SFV do not have any training program for them, except for the fishing safety training of fisher who carry out fishing for shipowners and crew of the coastal and offshore fishing vessel in accordance with the safety regulations for fishing vessels in the Fisheries Cooperative Association. Therefore, it is necessary to revise the training program so as to improve the preventive action and then emergency response including the fishing safety compliance with each fishery, safe navigation, machinery inspection and emergency response. Also, an SFV of less than 5 tons of 56,000 vessels is boarded by unqualified fishers. It would also be possible to consider subdividing small boat operator's certificate to enhance their qualifications. It is expected that marine casualties of SFV will be reduced if active efforts are made to improve the safety consciousness of fisher and shipowners as well as the reorganization of fishing safety training and the small boat operator's certificate system.

• 디지털융복합연구
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• 제16권6호
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• pp.213-222
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• 2018

본 연구의 목적은 밸런스 테이핑 요법이 노인의 무릎 통증과 관절가동범위에 미치는 효과를 검증하고자 시도하였다. 연구방법은 비동등성 대조군 전후설계의 유사실험연구로 자료수집은 2014년 12월 5일부터 10일까지 시행되었다. 연구대상은 노인여가복지시설을 이용하며 무릎 통증이 있는 60세 이상의 노인을 대상으로 하였다. 실험군(n=21)에게는 슬관절 밸런스 테이핑을 적용하였고, 대조군(n=19)에게는 테이핑 적용을 하지 않았다. 두 군의 무릎 통증 및 관절가동범위를 중재 전, 중재 1시간 후, 중재 24시간 후에 측정하였다. 통계분석은 SPSS/WIN 21.0 프로그램을 이용하였으며, ${\chi}^2$ test, Fisher's exact test, Mann-Whitney test, t-test, 반복측정 분산분석을 실시하였다. 연구결과 대조군에 비해 슬관절 밸런스 테이핑 요법을 받은 실험군에서 무릎 통증이 유의하게 감소하였고(F=34.03, p<.001), 무릎 관절가동범위가 유의하게 증가하였다(F=7.83, p=.006). 본 연구를 통해 슬관절 밸런스 테이핑 요법이 노인의 무릎 통증에 적용 가능한 독자적인 간호중재임을 확인하였다.

• 한국산학기술학회논문지
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• 제18권12호
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• pp.254-263
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• 2017

본 연구의 목적은 노인의 부정적 정서와 비만과의 관계를 파악하여 적정 체중관리를 위한 간호중재 개발 시 기초자료를 제공하기 위함이다. 연구 대상자는 충청북도 J시에 위치한 2개소의 노인 복지관을 이용하는 65세 이상의 노인 216명이었으며, 자료수집은 2017년 8월 14일부터 8월 30일까지 설문지 조사와 신체계측을 통하여 이루어졌다. 연구도구는 CES-D, RULS, BPS를 사용하였으며 수집된 자료는 SPSS 22.0통계프로그램을 이용하여 기술통계, t-test, ${\chi}^2-test$, Fisher' exact test, Pearson's correlation, Logistic regression을 분석하였다. 연구결과 대상자들의 체질량지수의 평균은 $23.59{\pm}3.48$이었으며, 31.9%가 비만인 것으로 나타났다. 정상군과 비만군 사이에 통계적으로 유의한 차이를 보였던 변수는 연령(${\chi}^2=8.16$, p=.003), 성별(${\chi}^2=9.27$, p=.002), 흡연 유무(${\chi}^2=7.78$, p=.004), 우울(t=2.54, p=.012)과 사회적 고립감(t=2.98, p=.003)이었고, 우울 (OR,1.04; 95% CI,1.00-1.09)과 사회적 고립감(OR,1.06; 95%CI,1.02-1.11)은 비만의 위험을 높이는 심리적 요인으로 나타났다. 따라서 노인 인구에서의 비만관리를 위하여 우울과 사회적 관계를 적절히 파악하고 측정해야 하며, 신체적, 정신적, 사회적 영역의 요구를 모두 충족시키는 체중관리 프로그램 및 간호중재의 개발이 필요하다.

• 한국융합학회논문지
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• 제9권2호
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• pp.267-276
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• 2018

본 연구의 목적은 원예활동프로그램이 4학년 간호대학생의 정서지능과 스트레스 대처에 미치는 효과를 검증하고자 하였다. 연구방법은 비동등성 대조군 전후 설계의 유사실험연구(Non-equivalent control group pretest-posttest design)이다. 연구대상은 G지역의 2개 대학의 4학년 간호대학생으로 실험군 29명, 대조군 30명이었다. 프로그램은 1회당 80분, 주 2회씩, 5주간 총 10회기로 운영하였다. 사전 사후조사는 동일하게 구조화된 설문지를 사용하여 정서지능, 스트레스 대처를 측정하였다. 자료분석은 SPSS WIN 21.0 프로그램을 이용하여 빈도분석(Frequency analysis), 기술통계(Descriptive statistics), ${\chi}^2-test$, t-test, Fisher's exact test, Kolmogorov-Smirnov, independent t-test, paired t-test를 이용하였다. 연구결과는 원예활동프로그램을 적용 후 정서지능(t=-3.33, p=.002)과 스트레스 대처(t=-2.35, p=.023)는 두 집단 간에 유의한 차이가 있었다. 이 연구 결과를 통해 원예활동프로그램은 4학년 간호대학생의 정서지능과 스트레스 대처 향상에 효과가 있음을 확인하였다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제49권2호
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• pp.75-85
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• 2023

Objectives: Suspending bisphosphonates (BPs) to reduce the risk and severity of medication-related osteonecrosis of the jaw (MRONJ) remains controversial. In this study, we quantitatively evaluated the clinical significance of BP suspension before surgery in osteoporosis patients with MRONJ. Materials and Methods: We analyzed 24 osteoporosis patients with MRONJ who were treated from 2012 to 2020 at Seoul National University Dental Hospital and compared the treatment outcomes of those who suspended BPs with those who did not. The number of surgical interventions, follow-up panoramic radiographs for relative bone density measurement, and laboratory blood tests including white blood cells, erythrocyte sedimentation rate, absolute neutrophil count, hemoglobin, hematocrit, and alkaline phosphatase were analyzed. ANOVA, Student's t-test, and Mann-Whitney U tests were used to compare results. Fisher's exact test was used to discover the association between treatment outcome and BP suspension, and Pearson's correlation test was used to measure the statistical relationship between the changes in serum inflammatory markers. Results: The number of interventions was significantly higher in the non-drug suspension group due to recurrence (P<0.05). The relative bone density in patients who suspended BPs was significantly different over time (P<0.05), with the highest density at one-year follow-up. Fisher's exact test shows an association between successful treatment outcomes and BP suspension. The alkaline phosphatase and erythrocyte sedimentation rate levels decreased significantly in the BP-suspended group, and a positive correlation was found between these elevated markers. Conclusion: A significant increase in bone density throughout follow-up and a lower number of interventions were found in the BP suspension group compared to the non-drug suspension group. Also, BP suspension decreased inflammatory markers in the serum after surgery, resulting in good treatment outcomes. BP suspension is a prognostic factor for MRONJ and should be implemented before surgery.

• Restorative Dentistry and Endodontics
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• 제37권3호
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• pp.149-154
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• 2012

Objectives: To evaluate the accuracy of the Root ZX in teeth with simulated root perforation in the presence of gel or liquid type endodontic irrigants, such as saline, 5.25% sodium hypochlorite (NaOCl), 2% chlorhexidine liquid, 2% chlorhexidine gel, and RC-Prep, and also to determine the electrical conductivities of these endodontic irrigants. Materials and Methods: A root perforation was simulated on twenty freshly extracted teeth by means of a small perforation made on the proximal surface of the root at 4 mm from the anatomic apex. Root ZX was used to locate root perforation and measure the electronic working lengths. The results obtained were compared with the actual working length (AWL) and the actual location of perforations (AP), allowing tolerances of 0.5 or 1.0 mm. Measurements within these limits were considered as acceptable. Chi-square test or the Fisher's exact test was used to evaluate significance. Electrical conductivities of each irrigant were also measured with an electrical conductivity tester. Results: The accuracies of the Root ZX in perforated teeth were significantly different between liquid types (saline, NaOCl) and gel types (chlorhexidine gel, RC-Prep). The accuracies of electronic working lengths in perforated teeth were higher in gel types than in liquid types. The accuracy in locating root perforation was higher in liquid types than gel types. 5.25% NaOCl had the highest electrical conductivity, whereas 2% chlorhexidine gel and RC-Prep gel had the lowest electrical conductivities among the five irrigants. Conclusions: Different canal irrigants with different electrical conductivities may affect the accuracy of the Root ZX in perforated teeth.

• 한국융합학회논문지
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• 제11권10호
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• pp.401-407
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• 2020

본 연구는 생명윤리의식과 뇌사자의 장기기증에 대한 교육을 받은 학생과 받지 않은 학생의 생명의료 윤리의식과 뇌사자 장기기증 지식을 측정하고 비교하기 위한 비동등성 대조군 유사 실험연구이다. 연구대상자는 C시에 소재한 1개 대학 간호학과에 재학 중인 2학년 학생 76명을 대상으로 하였으며, 실험군 37명에게는 생명윤리의식과 뇌사자 장기기증에 대한 교육을 제공하였다. 수집된 자료는 SPSS 23.0프로그램을 이용하여 Fisher's exact test, t-test, ANCOVA로 분석하였다. 검증결과 뇌사자 장기기증에 관한 지식이 실험군과 대조군 두 집단간 유의한 차이(F=35.21, p=.000)가 있는 것으로 나타났다. 이에 간호대학생의 생명의료윤리에 대한 교육과 생명의료윤리 의식에 영향을 미치는 변수를 고려한 교육과정 개발이 이루어져야 할 것이다.

• 한국콘텐츠학회논문지
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• 제12권4호
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• pp.292-303
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• 2012

본 연구는 J도에 소재한 2개 의료기관에서 주 1회 이상 혈액투석을 받고 있는 환자로서 1회 60분씩, 주 2회, 12주간 단전호흡 프로그램을 적용한 실험군 18명과 대조군 19명을 대상으로 비동등성 대조군 전-후 설계의 유사실험연구(Quasi-experimental design)이다. 단전호흡 프로그램이 혈액투석환자의 우울과 불안 및 피로에 미치는 효과를 규명하고자 우울(Zung, 1965)과 불안(Spielberger, 1975) 그리고 피로(Lee, Hick and Nino-Murcia, 1991)도구를 사용하여 종속변수를 측정하였으며, 간호중재로서의 가능성을 검증하였다. 연구결과, 단전호흡 프로그램을 실험처치한 실험군에서는 대조군보다 우울과 불안 정도의 감소는 통계적으로 유의하였으나 피로 정도 감소에는 유의하지 않았다. 따라서 단전호흡 프로그램은 만성질환자인 혈액투석환자의 우울과 불안을 감소시킬 수 있는 간호중재로 활용할 수 있을 것으로 사료된다.

• Journal of Communications and Networks
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• 제11권6호
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• pp.544-555
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• 2009

This work continues a trend of developments aimed at exploiting the physical layer of the open systems interconnection (OSI) model to enhance wireless network security. The goal is to augment activity occurring across other OSI layers and provide improved safeguards against unauthorized access. Relative to intrusion detection and anti-spoofing, this paper provides details for a proof-of-concept investigation involving "air monitor" applications where physical equipment constraints are not overly restrictive. In this case, RF fingerprinting is emerging as a viable security measure for providing device-specific identification (manufacturer, model, and/or serial number). RF fingerprint features can be extracted from various regions of collected bursts, the detection of which has been extensively researched. Given reliable burst detection, the near-term challenge is to find robust fingerprint features to improve device distinguishability. This is addressed here using wavelet domain (WD) RF fingerprinting based on dual-tree complex wavelet transform (DT-$\mathbb{C}WT$) features extracted from the non-transient preamble response of OFDM-based 802.11a signals. Intra-manufacturer classification performance is evaluated using four like-model Cisco devices with dissimilar serial numbers. WD fingerprinting effectiveness is demonstrated using Fisher-based multiple discriminant analysis (MDA) with maximum likelihood (ML) classification. The effects of varying channel SNR, burst detection error and dissimilar SNRs for MDA/ML training and classification are considered. Relative to time domain (TD) RF fingerprinting, WD fingerprinting with DT-$\mathbb{C}WT$ features emerged as the superior alternative for all scenarios at SNRs below 20 dB while achieving performance gains of up to 8 dB at 80% classification accuracy.

• 여성건강간호학회지
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• 제24권3호
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• pp.322-332
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• 2018

Purpose: To investigate the effect of a maternal role adjustment program on first-time mothers. Methods: The research was quasi-experimental with a non-equivalent control group non-synchronized design. Participants were first-time mothers admitted to two postpartum clinics at women's hospitals. The experimental group had 38 mothers and the control group had 35 mothers. A maternal role adjustment program was applied individually to the experimental group between the 1st and 2nd weeks after childbirth. Assessing Adaptation to Motherhood, Semantic Differential Scale-Myself as Mother, and Edinburgh Postnatal Depression Scale were used to measure effects of the program. A pre-test was conducted in the 1st week after childbirth while post-tests were conducted in the 4th and 6th weeks. Data were analyzed with $x^2$ test, Fisher's exact test, t-test, and repeated measures ANOVA using SPSS 24.0. Results: Maternal role adjustment (F=6.17, p=.015) and maternal identity (F=6.63, p=.012) were significantly increased in the experimental group compared to those in the control group. However, the difference in postpartum depression (F=1.11, p=.335) was not statistically significant between the two groups. Conclusions: The maternal role adjustment program can be utilized as an effective nursing intervention program to enhance maternal role adjustment and maternal identity for first-time mothers.