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The Underutilization of Lifestyle Modifications in Primary Care Medicine
Jean-Marc Lucas(Jean-Marc Lucas ),Karl F. Kozlowski(Karl F. Kozlowski ) 사피엔시아 2019 Exercise Medicine Vol.3 No.-
Chronic disease accounts for the majority of deaths in the United States and is often attributed to obesity. A sedentary lifestyle and poor nutrition are primary contributing factors to the development of obesity and thus chronic disease. Primary care providers are optimally positioned to prescribe exercise and nutrition (lifestyle medicine) as a treatment for chronic disease. Unfortunately, this opportunity seems to be regularly lost. Primary care providers often rely too heavily on weight loss pharmaceuticals and bariatric surgeries to treat obesity. This treatment approach however also does little to prevent and treat the accumulation of chronic diseases. The purpose of this review was to evaluate the efficacy of conventional medical weight loss treatments and determine why primary care providers may not prescribe exercise and nutrition more frequently. Our findings suggest that some primary care providers may be uncomfortable prescribing lifestyle medicine as they receive little formal education in this field. In conclusion, prescription of exercise and nutrition by primary care providers may elicit greater long-term weight loss than current medical weight management practices. Medical management is most likely effective when combined with lifestyle medicine. We propose that primary care providers be better trained in lifestyle medicine through their formal and clinical education. Rates of chronic disease accumulation may potentially decrease if providers prescribe lifestyle medical treatments more frequently.
( Lucas John Jensen ) 한국교육공학회 2016 한국교육공학회 학술대회발표자료집 Vol.2016 No.1
In the last two decades, the mainstream growth of the Internet has led to transformative change in education, particularly higher education, as the Internet has provided new opportunities for learning online and at a distance (Allen & Seaman, 2010, Shea & Bidjerano, 2010). Commensurate with this has been a rise in the sphere of online activity known as social media - networks of users tied together via Web 2.0-based applications that offer users an opportunity to generate and share content of their own (Kaplan & Haenlein, 2010). A recent development in the world of social media is the introduction of so-called "hashtags," represented symbolically by the "#" or "pound sign" symbol, joining use together, even if they don``t know each other (Ebner, Beham, Costa, & Reinhardt, 2009, Page, 2012). Easy to create, hashtags have become a unique way to experience global events, have political debates, or meet people with similar interests. For some time, online discussion forums have been a preferred pedagogical method of generating and facilitating discussion in online education and classrooms with online components (Mazzolini & Maddison, 2003, Rossman, 1999). Online discussion forums are typically administered through the built-in tools of a Learning Management System (LMS). Although LMSs offer basic tools for class instruction and management, there is debate as to the limits of their pedagogical value (Hong, 2008, Martindale & Wiley, 2004). The pedagogical concept of Personal Learning Environments (PLEs) challenges the dominance of LMS usage in online courses, bringing a student-centered and bottom-up perspective to online education. The thinking behind PLEs is that instruction should be situated in an environment more congruent with the learners`` typical technology usage for their personal lives, such as social media (Attwell, 2007). The purpose of this presentation is to share the research results of a study investigating the motivation of student``s participation in an online discussion forum when moved from an LMS to a class Twitter hashtag group. Twitter activity was analyzed, and respondents were surveyed on their intrinsic motivation in online discussions, social influences on their social media choice, and if their previous experience with social media affected motivation.
BERTRAND CURVES IN NON-FLAT 3-DIMENSIONAL (RIEMANNIAN OR LORENTZIAN) SPACE FORMS
Lucas, Pascual,Ortega-Yagues, Jose Antonio Korean Mathematical Society 2013 대한수학회보 Vol.50 No.4
Let $\mathbb{M}^3_q(c)$ denote the 3-dimensional space form of index $q=0,1$, and constant curvature $c{\neq}0$. A curve ${\alpha}$ immersed in $\mathbb{M}^3_q(c)$ is said to be a Bertrand curve if there exists another curve ${\beta}$ and a one-to-one correspondence between ${\alpha}$ and ${\beta}$ such that both curves have common principal normal geodesics at corresponding points. We obtain characterizations for both the cases of non-null curves and null curves. For non-null curves our theorem formally agrees with the classical one: non-null Bertrand curves in $\mathbb{M}^3_q(c)$ correspond with curves for which there exist two constants ${\lambda}{\neq}0$ and ${\mu}$ such that ${\lambda}{\kappa}+{\mu}{\tau}=1$, where ${\kappa}$ and ${\tau}$ stand for the curvature and torsion of the curve. As a consequence, non-null helices in $\mathbb{M}^3_q(c)$ are the only twisted curves in $\mathbb{M}^3_q(c)$ having infinite non-null Bertrand conjugate curves. In the case of null curves in the 3-dimensional Lorentzian space forms, we show that a null curve is a Bertrand curve if and only if it has non-zero constant second Frenet curvature. In the particular case where null curves are parametrized by the pseudo-arc length parameter, null helices are the only null Bertrand curves.
Influence of polishing systems on roughness and color change of two dental ceramics
Lucas Campagnaro Maciel,Carlos Frederico Bettcher Silva,Ricardo Huver de Jesus,Lais Regiane da Silva Concilio,Stefania Carvalho Kano,Anuar Antonio Xible 대한치과보철학회 2019 The Journal of Advanced Prosthodontics Vol.11 No.4
PURPOSE. To evaluate the polishing effect on roughness and color change of pressed and layering ceramics after immersion in coffee solution. MATERIALS AND METHODS. 88 ceramic discs (1.0 mm × 10.0 mm) were manufactured - 44 nano-fluorapatite layering ceramics (IPS e.max Ceram. Group C) and 44 pressed lithium disilicate ceramic discs (IPS e. max Press - Group P). Each group was divided into 4 subgroups according to surface treatments: (G) Glaze, (S) Shofu polishing system (Shofu Inc.), (E) Edenta AG polishing System, (KG) 30-μm diamond granulation tip. Surface roughness (Ra) and color change (ΔE) measurings after the surface treatments were performed, before and 12 days after the immersion in coffee solution. A samples’ qualitative analysis was conducted with a scanning electron microscopy (SEM). Data were statistically-treated with oneway-ANOVA and Duncan’s tests, apart from paired t-test and Pearson’s correlation test (α=5%). RESULTS. The decrescent order, both for surface roughness (Ra) and ΔE for both ceramics were: KG > E > S > G (P<.05). With exception for PG and CG subgroups, which did not present statistical difference between them, all other pressed ceramics subgroups presented smaller Ra values and greater ΔE values than the layering ceramics subgroups (P<.05). CONCLUSION. Although mechanical polishing systems presented intermediate Ra values, their colors were considered clinically acceptable. There is a strong correlation between the surface roughness and the color change of tested ceramics.
Globalization and International Tax Competition: Empirical Evidence Based on Effective Tax Rates
( Lucas Bretschger ),( Frank Hettich ) 세종대학교 경제통합연구소 (구 세종대학교 국제경제연구소) 2005 Journal of Economic Integration Vol.20 No.3
Previous work showing a positive impact of globalization on capital tax revenue as a percent of GDP claims to contradict theoretical results that tax competition pressures governments to reduce taxes on highly mobile assets. However, the observed relationship is not necessarily incompatible with the predictions of tax competition literature, as the internationalization of markets also affects the capital tax base. Measuring taxes by effective tax rates instead of tax revenue for a panel of 12 OECD countries in the period 1967-96, we find that globalization has a negative impact on capital taxes, which is exactly what the theory predicts.
Lucas Gimenis de Moura,Claudio R. Ávila da S. Jr.,Thiago Castro Bezerra,Waldir Mariano Machado Jr. 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.6
There are several mathematical models that describe the propagation of cracks. For many engineering applications, up to a certain point, it is not necessary to have great accuracy in predictions about the behavior of the evolution of a crack, but a reliable prediction, within certain limits, of such behavior. This work presents theoretical results consisting in obtaining lower and upper bounds that "envelop" the first and second order statistical moment estimators of the crack size function based on the fast crack bounds method. These bounds are polynomials defined in the variable “number of cycles” that consider the uncertainties of the parameters that describe the crack propagation models. The performance of the bounds for the statistical moments of the crack size is evaluated through the relative deviation between the bounds and the approximate numerical solutions of the initial value problems (IVP) that describe the crack evolution laws. For this work, the Collipriest model is used. The Monte Carlo simulation method is used to create samples of the selected parameters to obtain the crack size for both the bounds and the Runge-Kutta method.