This paper considers robust stability and transient behavior of the Two - Degree - of - Freedom(2DOF) servosystem. A class of uncertainties allowed in the plant model is obtained, to which the servosystem is robustly stable for any gain of the integral compensator. This result implies that if the plant uncertainty is the allowable set defined by the condition, a high - gain compensation can be carried out preserving stability to achieve a high - speed tracking response. The transient behavior attainable by the limit of the high - gain compensation is calculated using the singular perturbation approach.

Astragalus membranaceus is a well known oriental medicinal herb. The polysaccharides of the aboveground parts (AMA) and the radix (AMR) of A. membranaceus are the most important functional constituents. Methods and Results: The aim of this study was to determine the effects of AMA and AMR on the oxidative damage induced in the skeletal muscle of rats subjected to exhaustive exercise. Sprague-Dawley rats were randomly divided into exercise and non-exercise groups; in the groups receiving the test compounds, AMA and AMR were administered orally for 30 days. Skeletal muscle samples were collected from each rat after running to exhaustion on a treadmill to determine the activities of superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), and catalase (CAT) and the concentation of malondialdehyde (MDA). The antioxidant enzyme activities of SOD and GSH-Px of skeletal muscle of AMA- and AMR-treated groups were significantly higher than those of the control and commercial sports drink (SPD)-treated groups in exhaustive exercise rats. In addition, MDA concentrations in the skeletal muscle of the AMA- and AMR-treated groups were significantly lower than those of the control and SPD-treated groups. In the present study, the effects of AMA and AMR on exercise endurance capacity were also evaluated in mice subjected to a swimming exercise test. AMA and AMR supplementation prolonged the swimming time of mice and enhanced exercise endurance capacity. AMA and AMR possess the ability to retard and lower the production of blood lactate, and prevent the decrease of serum blood glucose. Conclusions: These results showed that, AMR and AMA exerted beneficial effect in mice, increasing the activity of the antioxidant systems and inhibiting oxidative stress induced by exhaustive exercise. The compounds improved exercise performance and showed anti-fatigue effects against exhaustive exercise.

Background: Polysaccharides are the most important functional constituent in Astragalus membranaceus. The purpose of the present study was to evaluate the effect of polysaccharides isolated from the aboveground parts of A. membranaceus (AMA) and polysaccharides isolated from the roots of A. membranaceus (AMR) immune function by modulated cytotoxic T cell and Th1- and Th2- related cytokines kinetics. Methods and Results: Sprague-Dawley rats were randomly divided into exhaustive exercise case groups and non-exercise case, AMA and AMR samples were administered orally for 30 days (500 ㎎/㎏/day and 10 ㎎/㎏/day, respectively) and were compared to those rats in the groups fed commercial sports drink (SPD) and vehicle. Both exhaustive exercise groups and non-exercise groups had a lower ratio of CD4+ and CD8+ cells in the spleens of the rat fed AMA and AMR compared to those in the rats fed SPD and vehicle group. These results suggested that AMA and AMR promote an increase in the proportion of cytotoxic T cells. The IL-4- producing T lymphocytes decreased significantly in the AMR (10 ㎎/㎏/day) group compared to SPD and vehicle, whereas the AMA group increased the IL-4 concentration more than the SPD and vehicle in exhaustive exercise group. However, the populations of IFN-γ-producing T lymphocytes of AMR and AMA increased. AMA decreased the concentration of IFN-γ to inhibit the Th1 response and thereby increased the concentration of IL-4 to induce a Th2 response that was related to humoral immunity in the non-exercise group. Conclusions: These results showed that, in addition to Th1/Th2 regulation, AMR and AMA played an important immuno-modulatory role after exhaustive exercise-induced Th1/Th2 lymphocyte imbalance, which might be correlated with cytokine producing immunoregulatory cells.

Upper airway obstruction is a common problem in pediatric patients. There were a few reports that airway obstruction caused by redundant arytenoid mucosa. The etiology of redundant arytenoid remains unknown. Redundant arytenoid mucosa is diagnosed endoscopically when one or both arytenoids anteriorly displace into the glottic inlet upon inspiration. The common symptoms are hoarseness, stridor, snoring or dyspnea on exertion. These symptoms are similar to croup and they can be easily misdiagnosed as croup. We experienced rare case of upper airway obstruction caused by redundancy of arytenoid mucosa and report it with review of literatures.

Die Trennung von Eigentum und Verwaltung kennzeichnet die moderne Wirtschaft. Durch das Auseinanderfallen von Eigentumszuständigkeit und Vermögensverwaltung ist die ungetreute Vermögensverwaltung und damit die Regelung der Untreue das charakteristische Wirtschaftsdelikt. Weder in der Common Law noch im Code Penal von 1810 wurde ein allgemeines Konzept der Untreue entwickelt. Das relativ spät entstandene deutsche Strafgesetzbuch von 1871 hat dagegen einen erstaunlich modernen Straftatbestand der Untereue geschaffen. Das japanische Strafgesetzbuch hat dieses deutsches Modell rezipiert und ihm eine abstrahierende Fassung gegeben. Neben dieser Moderniserung im Abstraktionsgrad hat das kStGB im Tatbestand sowohl Vermögensschaden als auch Vermögensvorteil verlangt. Damit hat das kStGB die in der Welt am höchsten entwickelte gesetzliche Regelung. Das Vertrauen im Sinne der Untreue ist nicht individuelles Vertrauen in Redlichkeit. Dieses Vertrauen bezieht sich das Vertrauen in das Wirtschaftssystem und ihr eigenen Handlungslogiken, denen zu entsprechen von dem Vermögensbetreuer erwartet wird. Dem Vermögensbetreuer wird besondere Macht über das Vermögen des Vermögensinhabers gegeben. So vertraut der Vermögensinhaber darauf, dass sein Vermögen gemäß der wirtschaftlichen Handlungslogik betreut wird. In der Untreue sieht man eine Machtstellung über das fremdes Vermögen. Priatautonomie ist keine isolierte, sondern eine im Wirtschaftssystem in der Gesellschaft. Der Vermögensbetreuer benuzt den Vermögensinhaber als seinen Werkzeug. Er missbraucht seine besonsere Macht und siene überlegene Stellung. Die Plenarentscheidung vom koreanichen Obersten Gerichtshof (́kOGH) hat anders als früher den Schuldner freigesprochen, der die Immobilien im Vorvertrag auf Annahme an Erfüllungs- statt für Forderungssicherung doppelt an Dritten verkauft. Sie begründet damit, dass in diesem Vorvertrag die Leistung an Erfüllungssicherung kein Geschäft des Gläubigers, sondern das Geschäft des Schuldner selbst. Daran scheitert die Untreue. Im Bereich des eigentlichen Doppelverkauf der Immobilien bejaht der kOGH noch die Untreue. Nach dem kOGH sei die Struktur zwischen beiden Verträgen anders. Die zivilrechtliche Struktur zwischen beiden muss anders sein. Aber die strafrechtliche Unrechtstruktur der Untreue ist m.E. als gleich bejaht angesehen. Der jederzeitige Zugriff auf das Vermögen eines anderen ist von Rechts wegen eröffnet. Das Zivilrecht wird hier geradezu zum Vehikel der Tatbegehung. Der Gläubiger hat sein Vermögen in die Herrschaft des Schuldners gegeben. Der strafrechtliche Schutz wird dadurch ausgelöst. Das ist keine bloße Verletzung einer schlichten Schuldnerpflicht. Der Schuldner benuzt sein überlegene Position und missbraucht die Herrschaft über das Vermögen des Gläubigers. Der betreffende Fall hat die strafrechtliche Unrechtsstruktur der Untreue.

본 연구에서는 본류의 하도준설로 인해 본류에 유입되는 지류하천의 하상고와 본류와의 하상고간의 높이차가 과도하게 발생함에 따라 지류하상의 안정화 기법을 검토하게 되었다. 지류하천의 하상고와 본류와의 높이차가 크게 발생함에 따라 하천을 직강화한 첩수로를 만들게 되고 하상 경사의 폭은 커지게 된다. 이 경우에는 유량과 하상 재료사이에는 변화가 없으므로 Lane식에서 우변 하상 경사의 증가는 자연히 좌변의 증가를 가져오므로 유사량의 증가를 가져오게 된다. 실제 하천 개수 사업에서 직강화는 하상의 세굴과 저하보다는 통상 하폭의 확대를 가져온다. 기준면의 저하는 지류 입장에서의 본류 수면이 일종의 기준면이 되므로 지류 에너지 경사의 증가를 의미하게 된다. 이 경우 Lane 관계식에서 하상 경사의 증가는 좌변의 증가를 가져오며, 하상 재료가 일정한 상태에서 이는 유사량의 증가를 가져온다. 즉 지류의 하상 경사와 유사량 증가는 하상의 침식을 의미하며, 이러한 침식은 상류로 진행된다. 이를 두부 침식이라 한다. 따라서 본 연구에서는 감천 본류하도 준설에 따른 지류하상의 하상변동과 지류유입 토사량에 대해서 검토하겠다.

Kyunghee Yeo. 2000. A Case Study on the Subject-Exchange Teaching Systems in Elementary English Class: a Transitional Scheme of Problem-Solving. Studies in Modern Grammar 20, 199-213. It goes without saying that a teacher who is responsible for the effective teaching is one of the most important factors in teaching-learning situation. The controversy over who should teach English to elementary school students has continued since English was introduced in elementary schools in 1997. There are two systems in which English can be taught in elementary schools. One is the system in which a classroom teacher who has the deepest understanding toward his/her students teach English. The other is the system in which a subject teacher who has good command of English teach English. Generally, the Ministry of Education encourages the classroom teacher to teach English to children and the teachers who have little confidence in teaching English prefer the system in which a subject teacher teaches. Both systems are said to he strengths and weaknesses. This paper suggests the subject-exchange teaching system that compromises above mentioned two systems and shows how elementary school teachers think of this system and illustrates the case and the effects of subject-exchange teaching system.