• 운동영양학회지
• /
• 제25권1호
• /
• pp.1-6
• /
• 2021

[Purpose] We determined the effect of partial sleep deprivation (PSD) after an exercise session on exercise performance on the following morning. [Methods] Eleven male athletes performed either a normal sleep trial (CON) or a PSD trial. On the first day (day 1), all subjects performed an exercise session consisting of 90 min of running (at 75% ${\dot{V}}O_{2max}$) followed by 100 drop jumps. Maximal strength (MVC) was evaluated before and after exercise. In the CON trial, the sleep duration was 23:00-7:00, while in the PSD trial, the sleep duration was shortened to 40% of the regular sleep duration. On the following morning (day 2), MVC, the metabolic responses during 20 min of running (at 75% ${\dot{V}}O_{2max}$), and time to exhaustion (TTE) at 85% ${\dot{V}}O_{2max}$ were evaluated. [Results] On day 2, neither the MVC nor ${\dot{V}}O_2$ during 20 min of running differed significantly between the two trials. However, the respiratory exchange ratio was significantly lower in the PSD trial than in the CON trial (p = 0.01). Moreover, the TTE was significantly shorter in the PSD trial than in the CON trial (p = 0.01). [Conclusion] A single night of PSD after an exercise session significantly decreased endurance performance without significantly changing muscle strength or cardiopulmonary response.

• Journal of Periodontal and Implant Science
• /
• 제48권3호
• /
• pp.152-163
• /
• 2018

Purpose: To determine whether the swelling and mechanical properties of osmotic self-inflating expanders allow or not the induction of intraoral soft tissue expansion in dogs. Methods: Three different volumes (0.15, 0.25, and 0.42 mL; referred to respectively as the S, M, and L groups) of soft tissue expanders (STEs) consisting of a hydrogel core coated with a silicone-perforated membrane were investigated in vitro to assess their swelling behavior (volume swelling ratio) and mechanical properties (tensile strength, tensile strain). For in vivo investigations, the STEs were subperiosteally inserted for 4 weeks in dogs (n=5). Soft tissue expansion was clinically monitored. Histological analyses included the examination of alveolar bone underneath the expanders and thickness measurements of the surrounding fibrous capsule. Results: The volume swelling ratio of all STEs did not exceed 5.2. In tensile mode, the highest mean strain was registered for the L group ($98.03{\pm}0.3g/cm$), whereas the lowest mean value was obtained in the S group ($81.3{\pm}0.1g/cm$), which was a statistically significant difference (P<0.05). In addition, the S and L groups were significantly different in terms of tensile strength ($1.5{\pm}0.1g/cm$ for the S group and $2.2{\pm}0.1g/cm$ for the L group, P<0.05). Clinical monitoring showed successful dilatation of the soft tissues without signs of inflammation up to 28 days. The STEs remained volumetrically stable, with a mean diameter in vivo of 6.98 mm, close to the in vitro post-expansion findings (6.69 mm). Significant histological effects included highly vascularized collagen-rich fibrous encapsulation of the STEs, with a mean thickness of $0.67{\pm}0.12mm$. The bone reaction consisted of resorption underneath the STEs, while apposition was observed at their edges. Conclusions: The swelling and mechanical properties of the STEs enabled clinically successful soft tissue expansion. A tissue reaction consisting of fibrous capsule formation and bone loss were the main histological events.

• Bulletin of the Korean Chemical Society
• /
• 제12권5호
• /
• pp.515-517
• /
• 1991

The electronic behavior of a organic metal $(BEDT-TTE)_2$${Cu_5}{I_6}$ observed to be stable at low temperatures was examined by performing tight-binding band electronic structure calculations. The suppression of a metal-insulator tansition is likely to originate from its quasi-two-dimensional Fermi surface with no nesting, in agreement with experiment.

• Journal of Yeungnam Medical Science
• /
• 제32권2호
• /
• pp.118-121
• /
• 2015

Cardiogenic embolic stroke accounts for approximately 20% of ischemic strokes and the likelihood of its recurrence is high. Paradoxical embolism may be an important cause of cardioembolic stroke, which can be evaluated through multiple diagnostic modalities including transesophageal echocardiography (TTE) or transcranial Doppler. A persistent left superior vena cava (PLSVC) is a rare congenital vascular anomaly, which mainly drains to the right atrium via the coronary sinus. Although rare, PLSVC draining into the left heart predisposes the patient to paradoxical embolism through a right-to-left shunt. We report on a 78-year-old female patient with an ischemic stroke associated with PLSVC draining into the left atrium through the pulmonary vein, which was investigated via TTE with an agitated saline test and computed tomography.

• Korean Journal of Radiology
• /
• 제22권6호
• /
• pp.890-900
• /
• 2021

Objective: To identify the association between morphological and functional characteristics of the bicuspid aortic valve (BAV) and bicuspid aortopathy and to identify the determinants of aortic dilatation using transthoracic echocardiography (TTE) and cardiac computed tomography (CCT). Materials and Methods: This study included 312 subjects (mean [SD] age, 52.7 [14.3] years; 227 males [72.8%]) who underwent TTE and CCT. The BAVs were classified by anterior-posterior (BAV-AP) or right-left (BAV-RL) orientation of the cusps and divided according to the presence (raphe+) or absence of a raphe (raphe-) based on the CCT and intraoperative findings. The dimensions of the sinus of Valsalva and the proximal ascending aorta were measured by CCT. We assessed the determinants of aortic root and proximal ascending aortic dilatation (size index > 2.1 cm/m²) by Univariable and multivariable logistic regression analyses. Results: Of the 312 patients, BAV-AP was present in 188 patients (60.3%), and 185 patients (59.3%) were raphe+. Moderate-to-severe aortic stenosis (AS) was the most common hemodynamic abnormality (54.8%). The most common type of aortopathy was the combined dilated root and mid-ascending aortic phenotype (62.5%). On multivariable analysis, age and AS severity were significantly associated with aortic root dilatation (p < 0.05), and age, sex, and AS severity were significantly associated with ascending aortic dilatation (p < 0.05). However, the orientation of the cusps, presence of a raphe, and severity of aortic regurgitation were not associated with aortic root and ascending aortic dilatation. Conclusion: BAV morphological characteristics were not determinants of aortic dilatation. Age, sex, and AS severity were predictors of bicuspid aortopathy. Therefore, age, sex, and AS severity, rather than valve morphology, need to be considered when planning treatment for BAV patients.

• 전자통신동향분석
• /
• 제17권6호통권78호
• /
• pp.108-116
• /
• 2002

2001년 4월 이후 유럽연합지역에서는 유.무선통신기기 인증 지침(R&TTE Directive: 1999/5/EC)이 발효됨에 따라 유럽연합과 개별회원국 간에는 1980년 후반 이후 유럽연합의 합의 정책의 목표였던 ‘새롭고도 광범위한 접근방식’에 의한 유.무선 통신기기의 기술 규제 운영체제가 정립되게 되었다. 이하에서는 무선통신기기 부분을 중심으로 유럽연합과 개별 회원국인 영국의 사례를 살펴봄으로써 국내 무선통신기기 기술규제체제의 정립에 기여하는 것을 목적으로 삼는다.

• 보건의료산업학회지
• /
• 제14권2호
• /
• pp.55-65
• /
• 2020

Objectives: This study intends to analyze the relationship between medical service experience and subjective health awareness by using data from Panel Study of Worker's Compensation Insurance(PSWCI). Methods: Tte χ2-test was performed to investigate subjective health awareness and medical service experience relevance. Logistic analysis was performed to analyze the influencinge factors. Results: The subjective health awareness scored "bad" in"'lack treatment period" compared to "adequate treatment period" in medical service experience (OR = 2.603 [95% CI = 1.666-2.555]). Conclusions: To improve the subjective health awareness of patients with industrial accidents, the industrial accident compensation and medical care approval system should be improved, and long-term industrial accident insurance policies should be developed to accommodate direct and indirect medical services.

• Journal of Yeungnam Medical Science
• /
• 제30권2호
• /
• pp.112-115
• /
• 2013

The incidence and importance of tricuspid valve regurgitation after a blunt chest injury has risen with the increase in the number of automobile accidents and steering wheel traumas. This kind of injury has been reported more frequently in the last decade because of the better diagnostic procedures and understanding of the pathology. However, tricuspid valve regurgitation following a blunt chest injury can still be easily missed because most patients do not show symptoms at the time of the trauma. A 55-year-old male patient presented himself at our facility after suffering a chest injury from an automobile accident. His transthoracic echocardiography (TTE) revealed severe tricuspid valve regurgitation due to the prolapse of his anterior valve leaflet. We report a case of asymptomatic tricuspid regurgitation that developed after a blunt chest injury.

• 대한전자공학회논문지
• /
• 제8권6호
• /
• pp.8-16
• /
• 1971

본 논문은 원자로 또는 방사성 동위요소등에서 방사되는 방사선의 계수률을 선형적으로 미터로 지시할 수 있는 동시에 기록계로도 기록할 수 있는 완전 트랜지스터화된 선형 계수률계의 개발에 관한 연구이다. 이 계수률계는 양호한 안정을 위하여 트랜지스터 Chopper를 사용하였다. 교류증폭기의 입력단에는 높은 입력저항을 주기 위하여 composite emitter follower buffer stage를 사용하였으며 hybrid parameter 등가회로를 구성하여 해석하였다. 계수률은 수 CPS로 부터 100KCPS까지 4개 영역으로 나누어서 선형적으로 계수할 수 있으며 분해능은 0.5μsec 미만이고 상온에서의 출력 drift는 7시간 계속동작시켰을시에 ±0.5μA 정도이다.

• 한국독어학회지:독어학
• /
• 제4집
• /
• pp.181-203
• /
• 2001

Die vorliegende Arbeit zielt ab nicht auf die sprachwissenschaftlichen Auseinandersetzungen, sondern auf dem $\"{U}berblick$ der Analysetypen der Werbesprache. Werbung ist als ein Mittel behandelt, womit die kommunikativen Probleme zwischen den Sendern und den $Empf\"{a}ngern\;gel\"{o}st$ werden will. Und die Werbetexter bedienen sich der Sprache als Kommunikationsmittel. Dabei soli die Kommunikation der Werbung sowohl zur Kommunikation als auch der Persuasion und der Manipulation beitragen. Nach Baumgart(1992:28) bildet die Werbung Vorstellungen im $Bewu{\ss}tsein$ der Rezipienten, und entwickelt das spezielle Image eines produktes, ohne das dieses kaum eine Chance $h\"{a}tte$, gekauft zu werden. Wegen dieser starken $Zweckm\"{a}{\ss}igkeit$ der Werbung ist die Werbesprache mit allen $n\"{o}tigen\;K\"{u}nstlichkeiten$ wohl versehen und als eine Art von der Sprachplannung angesehen. Ihre hohe $K\"{u}nstlichkeit$ ist eine der sprachlichen Faktoren der Werbesprache, die Werbesprache von der Alltagssprache unterscheiden $k\"{o}nnen$. Am Anfang der Industrialisierung hat die Sprachwissenschaft geringeres Interesse an die Werbesprache. Mit der Ausweitung der Warenproduktion durdch Industrisierung kommt die Werbung in Aufschwung, und ihre Sprache wird Gegenstand von verschiedenen $F\"{a}chern$ wie der Soziologie und den Wirtschaftswissenschaften $einschlie{\ss}lich$ der Sprachwissenschaft. Erst seit den $f\"{u}nfziger$ Jahren wird die Werbesprache aus sprachwissenschaftlicher Perspektive interessant. Die meisten sprachwissenschaftlichen Untersuchungen $\"{u}ber$ die Werbesprache beziehen sich auf die sprachlichen Formen($Satzl\"{a}nge$, Satzbau, Satzarten), den Wortschatz(Wortbildungen, $Neusch\"{o}pfungen$, Zusammensetzungen, Ableitungen, Wortarten, $Schl\"{u}sselworter,\;Worth\"{a}ufigkeit,\;Fremd\w\"{o}rter$), die Stilmittel oder rhetorische Mittel, textlinguistische Merkmale (Kommunikationsimplikatur, illokutive Bedeutungen), kulturelle und soziologische Merkmale($Kulturabh\"{a}ngigkeit,\;Kulturspezifit\"{a}t,\;Interkulturalit\"{a}t$), die Sprachkritik, und den semiotischen Aspekt.