40,913 research outputs found
Journal for Geometry and Graphics
No full textThe singular coincidence in 2022, 25th anniversary of the publication of the first issue of the Journal of Geometry and Graphics (JGG), 30th anniversary of the establishment of the International Society for Geometry and Graphics (ISGG), and 80th birthday of Hellmuth Stachel, Professor of Geometry at the Technical University of Vienna (now retired), founder and former Editor in Chief of the JGG, and co-founder of ISGG, suggested the idea of this special issue.
The Editorial Board, formed by the current Editor in Chief who launched the proposal, the President, the Vice-Presidents, and the Treasurer of ISGG, decided to publish the issue as part of the JGG series, in order to reach the audience of readers familiar with the journal, and with the person to whom this issue is dedicated.
The volume includes two editorial sections, “Personal Memories” and “Scientific Contri butions”, in the aim of reflecting the wide spectrum of competences and interests of Hellmuth Stachel, deepened and shared in a life actively spent between research and education, without missing some personal items and anecdotes.
“Personal Memories” consist of short contributions written by people being, or having been, closely connected with Hellmuth Stachel over more than three decades, who share their personal records about his role in science, education, and community services.
“Scientific Contributions” refer to the world wide scientific impact of Hellmuth Stachel, and consist of a number of papers on topics related to Geometry and Graphics, written by authors of various backgrounds and generations, invited from the three ISGG world regions (Asia/Australia/Oceania, Europe/Near East/Africa, North America/South America).
May this special issue celebrating such an exemplary academic profile, inspire all the readers, as well as the whole JGG and ISGG communities, and, why not, initiate a new editorial line inside the JGG series.
On behalf of JGG and ISGG, we warmly address to Professor Hellmuth Stachel our birthday wishes, and cordial greetings to his family and his wife Mrs. Henrike.
The Guest Editorial Board of JGG 26/1
Liang-Yee Cheng, Luigi Cocchiarella, Hans-Peter Schr ̈ocker, Kumiko Shiin
Validity of the Novel Taiwan Lymphoscintigraphy Staging and Correlation of Cheng Lymphedema Grading for Unilateral Extremity Lymphedema
No full textOBJECTIVE: The aim was to validate the new Taiwan Lymphoscintigraphy Staging, correlate it with Cheng Lymphedema Grading (CLG) and evaluate the treatment outcomes of unilateral extremity lymphedema. BACKGROUND: No consensus has been reached for diagnosis and staging for patients with lymphedema among medical specialties. METHODS: We included 285 patients with unilateral extremity lymphedema using lymphoscintigraphy. Lymphoscintigraphy was correlated to clinical symptoms and signs, and classified into normal lymphatic drainage, partial obstruction, and total obstruction. Inter- and intraobserver reliability of Taiwan Lymphoscintigraphy Staging, correlation between Taiwan Lymphoscintigraphy Staging and clinical findings were conducted. Patients were categorized in "surgical" (n = 154) or "nonsurgical" (n = 131) groups for outcome evaluation. RESULTS: Lymphoscintigraphy found 11 patients (3.9%) with normal lymphatic drainage, 128 (44.9%) with partial obstruction, and 146 (51.2%) with total obstruction. Taiwan Lymphoscintigraphy Staging showed high interobserver agreement [intraclass correlation coefficient: 0.89 (95% confidence interval, 0.82-0.94)], and significantly correlated to computed tomography volumetric difference (r = 0.66, P < 0.001) and CLG [intraclass correlation coefficient: 0.79 (95% confidence interval 0.72-0.84)]. At a mean follow-up of 31.2 ± 2.9 months, significant improvement in the circumferential difference (from 23.9% ± 17.6% to 14.6% ± 11.1%; P = 0.03) with a mean circumferential reduction rate of 40.4% ± 4.5% was found in surgical group. At a mean follow-up of 26.6 ± 8.7 months, the nonsurgical group had increase of mean circumferential difference from 24.0% ± 17.2% to 25.3% ± 19.0% (P = 0.09), with a mean circumferential reduction rate was -1.9% ± 13.0%. CONCLUSIONS: The Taiwan Lymphoscintigraphy Staging is a reliable diagnostic tool, correlated with clinical findings and CLG, aiding in the selection of the appropriate treatment to achieve favorable long-term outcomes in unilateral extremity lymphedema
The causal induction from the theory of causal power of Cheng
No full textUna de las teorías centrales dentro de la explicación de la inducción causal (i.e. el proceso de inferencia que permite a las personas identificar causas en la cotidianidad) es la Teoría del Poder Causal que Patricia Cheng desarrolló en 1997 y que ha venido defendiendo desde esa época (Cheng, 1997; Holyoak y Cheng, 2011). Dicha teoría pretende superar los tradicionales modelos de mecanismo y los simples modelos de covariación que hasta el momento se consideraban como la explicación del proceso de inducción causal. Sin embargo la complejidad del modelo matemático que la sustenta la ha hecho poco accesible a la comunidad no especializada que se pueda interesar en este campo. El propósito del presente artículo es, entonces, realizar una introducción a la teoría de poder causal en la que se muestra no sólo sus ventajas explicativas frente a los otros modelos, sino una reconstrucción sencilla del modelo matemático que la sustenta.One of the central theories within the explanation of the causal induction (i.e. , the inference process that allows the people identify causes in the everyday life) is the Theory of Causal Power that Patricia Cheng development in 1997 and that has been advocating since that time (Cheng, 1997; Holyoak &amp; Cheng, 2011). This theory seeks to overcome the traditional mecha-nism models and simple models of co that until the time they were considered as an explanation of the process of causal induction. However the complexity of the mathematical model that sustains them has done little accessible to the non-specialized community that may be of interest in this field. The purpose of this article is, then, make an introduction to the Theory of Causal Power that shows not only its ex-planatory advantages compared to other models, but a simple reconstruction of the mathematical model that underpins it
[[alternative]]The Effect of Wai Tan Kung Exercise on Energy Expenditure And Heart Rate Variability
No full text[[abstract]]The Effect of Wai Tan Kung Exercise on
Energy Expenditure And Heart Rate Variability
Graduate student: Cheng-Kun Wu
Advisor: Cheng-Chung Lin ,Ph.D.
Abstract
The purpose of the present study was to investigate the effect of long-term Wai Tan Kung exercise on heart rate (HR), energy expenditure, oxygen uptake (VO2), ventilation (VE), heart rate variability and blood pressure. Two different groups of older adults were recruited. One group subjects (n =16; 65.0 ± 4.2 yrs, 163.3 ± 7.3 cm, 63.3 ± 7.3 kg) had been participated at least 10 years of regular Wai Tan Kung exercise (long-term group, LTG), and the other (n = 16; 59.0 ± 3.7 yrs, 162.0 ± 3.9 cm, 65.7 ± 3.6 kg) had been participated as same exercise as LTG but less than one year (short-term group, STG). The results of this study showed that there were significant differences (p < .05) in rest systolic pressure, and HR, energy expenditure, VO2, VE, high frequency power (HFP) and low frequency power (LFP) during exercise between LTG and STG (p < .05). LTG subjects had a significant lower in rest heart rate and blood pressure (p < .05) than STG subjects, and the former also reached higher (p < .05) exercise intensities during exercise testing than the latter. Moreover, there were significant higher heart rate, VO2 and VE during exercise testing for LTG than STG, suggesting that LTG subjects had higher metabolic rate. Additionally, LTG had a higher HFP than STG, suggesting that there was a significant increase in parasympathetic division of autonomic nervous activity during exercise testing for LTG than STG, indicating LTG subjects may prevent from coronary artery disease and improve functions of the heart. It is concluded that older adults participate in regular long-term of Wai Tan Kung exercise have a positive effect on their cardiovascular fitness. Therefore, such kind of exercise may especially fit for older adults.
Key words: oxygen uptake (VO2), ventilation (VE), heart rate, heart rate variability, Wai Tan Kung exercise.
Vapor-liquid equilibria for the ternary system of carbon dioxide + ethanol + ethyl acetate at elevated pressures
No full textWhy can't Chinese Han drink alcohol? Hepatitis B virus infection and the evolution of acetaldehyde dehydrogenase deficiency
No full textVapor-liquid equilibria of carbon dioxide with isopropyl acetate, diethyl carbonate and ethyl butyrate at elevated pressures
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