The Rise and Fall of the North-South Dialogue : Patterns of Reform and Resistance

Rothstein, Robert L. Center for International Studies, Inha University 1986 Pacific Focus Vol.1 No.1

The Educative Process and the Search for Complementarity in Intercultural Relations

Rothstein, Arnold M. 서울大學校 師範大學 敎育學科 1989 敎育理論 Vol.4 No.1

The Limitations of Judging School Quality and Driving School Reform by Test Scores in the American Education System

Richard Rothstein 한국교육개발원 2005 KEDI Journal of Educational Policy Vol.2 No.1

This essay describes commonplace myths about American student achievement. American educational policymakers and the public devote great attention to the quality of public schools and they often judge the quality of these schools by standardized test scores. When the public has been led to believe that test scores have declined over time or fare poorly in comparison to scores in other developed countries, it has demanded school reforms to fix those problems. Drawing on historical and international comparisons, the essay identifies problems that arise when attempts are made to judge and to improve school quality based on anecdotal evidence and test scores.

The Rise and Fall of the North-South Dialogue: Patterns of Reform and Resistance

( Robert L. Rothstein ) 인하대학교 국제관계연구소 1986 Pacific Focus Vol.1 No.1

Dental and skeletal characteristics and growth in Class Ⅲ malocclusion between skeletal ages of 10 and 14

Park, Young-Guk,Lee, Young-Jun,Min, Seungki,Ted Rothstein 대한치과교정학회 2003 대한치과교정학회지 Vol.33 No.6

이 연구는 두부X선 규격사진을 이용하여 Ⅲ급 부정교합자의 안모를 연령 성별로 분류하고, 각 분류에 대한 두개 안면형태의 특성을 구명하기 위하여 시행되었다. 정상교합자 60명과 Ⅲ급 부정교합자 60명을 표본으로 하였으며 각 군은 10세, 12세, 14세 군 남녀로 구분되었다. 50개의 선 및 각계측치를 Krogman-Walker의 기준평면을 기준하여 측정하였다. 1. Ⅲ급 부정교합군은 전방두개저의 길이와 안상각이 정상교합자군에 비하여 작고 하악골체와 하악수직고경이 큰 것으로 나타났으며 이러한 차이는 남녀 모두 10세부터 유의하게 나타났다. Ⅲ 급 부정교합군에서의 하악하연각의 유의한 증가는 남녀 모두 12세때 나타났다. 2. Ⅲ급 부정교합자군에서의 상악골의 후방 위치와 상악골체 크기의 유의한 감소는 남녀 모두 10세부터 나타난다. 3. Ⅲ급 부정교합자군에서 유의한 하안면부 수직고경의 증가는 주로 하악골체 크기의 변화에 기인하는 것으로 관찰되었다. 하악골체의 경우 Ⅲ급 부정교합자군에서 더 크고 전하방에 위치하는 것이 관찰되었다. Ⅲ급 부정교합자군에서의 전체적인 수직고경의 유의한 증가는 12세군에서 유의하게 나타나기 시작한다. 4. 본 연구에서는 Ⅲ급 부정교합자군에서의 두개저부각의 감소와 (Ba-S-N, 3A) 하악골체의 전방 위치는 남녀 모든 연령층에서 일관되게 관찰되었다. 이 결과는 Rothstein 등에 의해 주장된 Ⅱ급 부정교합자군에서의 두개저부각의 변화가 하악골체의 전후방 위치에 영향을 주지 못한다는 주장을 부정하며, 디벳 등에 의해 주장된 앵글씨의 부정교합분류와 두개안면형태의 상관성에 대한 연구를 지지한다. The purpose of this study was to evaluate growth changes and skeletal characteristics of Korean children with Class Ⅲ malocclusions from 10 to 14 years of skeletal age. Radiographs of 60 children with Class Ⅲ malocclusion and 60 normal controls were assessed. Both groups were subdivided into 6 samples according to sex and skeletal age. Skeletal age was assessed using handwrist X-rays using the Greulich and Pyle norms. The Krogman-Walker plane (occipitale-maxillon) through Sella was used as a reference plane in this study with y-axis perpendicular to the x-axis. Six Student t-tests were conducted to compare the control group with the Class Ⅲ group according to each gender and age. The characteristics of Class Ⅲ malocclusion group compared to the control group included shorter anterior and posterior cranial base, shorter and retrusive maxilla, longer mandible, increased molar-incisor distance, retroclined lower incisors, labially proclined upper incisors, and anteriorly located mandibular molar, smaller upper and middle facial depth, and larger lower facial depth. Landmarks representing facial depth, size of maxilla and mandible, and their AP relationship including anterior facial height indicate that growth characteristic was determined early in life. But growth pattern of cranial base and some of the dental landmarks showed progressive divergence between Control and Class Ⅲ groups with age. The position of the posterior border of the mandible was found to be significantly forward in both females and males by the age of 14 and at the anterior border in males and females at all ages. Hyperdivergent mandibular plane, changes in anterior segment of mandible, small anterior cranial base, and decrease in cranial base flexure was also noted.

High temperature extensional rheology of commercially available polycarbonate mixed with flame retardant salts

Samrat Sur,Manojkumar Chellamuthu,Jonathan Rothstein 한국유변학회 2020 Korea-Australia rheology journal Vol.32 No.1

In this paper, we present a study of the dripping properties of polycarbonate (PC) modified with combinations of earth metal salts of inorganic sulfur, potassium perfluorobutane sulfonate (Rimar); non-halogenated flame retardant additives, potassium diphenyl sulfone-3-Sulfonate (KSS); and block co-polymerspolytetrafluoroethylene encapsulated with styrene acrylonitrile resin (T-SAN). Measurements of the extensional rheology of polycarbonate with different concentration of each flame retardant additive were performed using a custom-built high temperature Capillary Breakup Extensional Rheometer (CaBER) at temperatures up to T = 400oC. From these measurements, the evolution of the apparent transient extensional viscosity was monitored as a function of time and strain both in air and in an inert nitrogen environment. The evolution of extensional viscosity has been shown to be an excellent tool for predicting the dripping behavior of polymers exposed to heat and a valuable tool for understanding the mechanism of polymer degradation which is typically dominated by either crosslinking or charring. We show that extensional rheology measurements are significantly more sensitive to temperature-induced changes to the polymer microstructure than shear rheology measurements. We have also performed systematic concentration of specific flame retardant salts and through variation in extensional rheology and investigated the optimum concentration required to achieve a V0 rating. Finally, we will show that extensional rheology is a powerful method for predicting the effect of flame retardant modifiers and optimizing their use in new flame resistant materials.

Characteristic features of B cells in murine cervical lymph nodes

YEO, SEUNG GEUN,TUMANG, JOSEPH R.,ROTHSTEIN, THOMAS L. 경희대학교 동서의학연구소 2006 東西醫學硏究所 論文集 Vol.2006 No.-

Conclusion. B cells in cervical lymph nodes correspond to typical conventional B cells (B-2). Objective. The special status of cervical lymph nodes in relation to the oropharynx, and the need to maintain the integrity of the oropharnygeal mucosal barrier, suggest the possibility that cervical lymph node B cells located in the oropharynx may behave differently from B cells located elsewhere. In this study we examined the symmetry or lack thereof between cervical lymph node B cells and other B-cell subsets. Material and methods. We isolated B cells from murine cervical lymph node tissue and evaluated them in vitro according to several criteria. Results. We found that cervical lymph node B cells expressed typical B-cell phenotypic markers and proliferated normally in response to mitogenic stimulation. They did not spontaneously secrete immunoglobulin and, in keeping with this, did not express elevated levels of either CD138 (Syndecan-1), a marker for plasma cells, or BLIMP-1, a putative master regulator of B-cell differentiation.

B세포의 증식에 있어 B-1 임파구와 B-2 임파구의 차이점에 대한 연구

여승근,조중생,박동춘,Thomas L. Rothstein 대한면역학회 2004 Immune Network Vol.4 No.3

Background: B-1 cells differ from conventional B-2 cells both phenotypically and functionally. The aim of this study was to investigate the difference between peritoneal B-1 cells and splenic B-2 cells in proliferation. Methods: We obtained sorted B-1 cells from peritoneal fluid and B-2 cells from spleens of mice. During the culture of these cells, immunoglobulin secreted into the culture supernatants was evaluated by enzyme- linked immunosorbent assay. Entering of S phase in response to LPS-stimuli was measured by proliferative assay. Results: Spontaneous Immunoglobulin M production occurred in peritoneal B-1 cells but not in splenic B-2 cells. LPS stimulated peritoneal B-1 cells secreted IgM at day 1, but splenic B-2 cells at day 2. In thymidine incorporation, peritoneal B-1 cells entered actively S phase after 24hours LPS-stimulation but splenic B-2 cells entered actively S phase after 48 hours. Conclusion: IgM secretion and S phase entering occurred early in peritoneal B-1 cells compared to splenic B-2 cells. (Immune Network 2004;4(3):155-160)

The geometry of quantum learning

Hunziker, Markus,Meyer, David A.,Park, Jihun,Pommersheim, James,Rothstein, Mitch Springer-Verlag 2010 QUANTUM INFORMATION PROCESSING Vol.9 No.3

Presynaptic Regulation of Astroglial Excitatory Neurotransmitter Transporter GLT1

Yang, Yongjie,Gozen, Oguz,Watkins, Andrew,Lorenzini, Ileana,Lepore, Angelo,Gao, Yuanzheng,Vidensky, Svetlana,Brennan, Jean,Poulsen, David,Won Park, Jeong,Li Jeon, Noo,Robinson, Michael B.,Rothstein, J Elsevier 2009 Neuron Vol.61 No.6

<P><B>Summary</B></P><P>The neuron-astrocyte synaptic complex is a fundamental operational unit of the nervous system. Astroglia regulate synaptic glutamate, via neurotransmitter transport by GLT1/EAAT2. Astroglial mechanisms underlying this essential neuron-glial communication are not known. We now show that presynaptic terminals regulate astroglial synaptic functions, GLT1/EAAT2, via kappa B-motif binding phosphoprotein (KBBP), the mouse homolog of human heterogeneous nuclear ribonucleoprotein K (hnRNP K), which binds the GLT1/EAAT2 promoter. Neuron-stimulated KBBP is required for GLT1/EAAT2 transcriptional activation and is responsible for astroglial alterations in neural injury. Denervation of neuron-astrocyte signaling by corticospinal tract transection, ricin-induced motor neuron death, or neurodegeneration in amyotrophic lateral sclerosis all result in reduced astroglial KBBP expression and transcriptional dysfunction of astroglial transporter expression. Presynaptic elements dynamically coordinate normal astroglial function and also provide a fundamental signaling mechanism by which altered neuronal function and injury leads to dysregulated astroglia in CNS disease.</P>