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خلاصه: سابقه و هدف: در رادیوگرافی پانورامیک محافظ تیروئید بدلیل ایجاد ارتیفکت بطور روتین استفاده نمی شود. در این مطالعه بر انیم تا تاثیر استفاده نوع خاصی از شیلد محافظ ( aktif ep 316 ) را بر دوز جذبی غده تیروئید مراجعین به یک کلینیک خصوصی شهر تهران در سال 93-1392 مورد بررسی قرار دهیم. مواد و روش ها: این تحقیق با طراحی کارآزمایی بالینی بر روی 20 مرد که از لحاظ قد , وزن و سن همسان بوده و دستور...
J. Henderson,1 D. G. Jenkins,1 K. Kaneko,2 P. Ruotsalainen,3 P. Sarriguren,4 K. Auranen,3 M. A. Bentley,1 P. J. Davies,1 A. Görgen,5 T. Grahn,3 P. T. Greenlees,3 A. Hay,1 T. W. Henry,1 A. Herzáň,3 U. Jakobsson,3 R. Julin,3 S. Juutinen,3 J. Konki,3 M. Leino,3 C. McPeake,6 S. Milne,1 A. J. Nichols,1 J. Pakarinen,3 P. Papadakis,3 J. Partanen,3 P. Peura,3 P. Rahkila,3 E. Sahin,5 M. Sandzelius,3 J. ...
We classify the homogeneous polynomials in three variables whose toric polar linear system defines a Cremona transformation. This classification includes, as a proper subset, the classification of toric surface patches from geometric modeling which have linear precision. Besides the well-known tensor product patches and Bézier triangles, we identify a family of toric patches with trapezoidal sh...
Concentrations of OH, and major and trace elements were determined in a suite of mantle-derived megacrysts that represent the crystallization products of a kimberlite-like magma at 5 GPa and 1400---1100 C. OH concentrations, determined by singlecrystal Fourier transform infrared spectroscopy, display the following ranges (ppmw H2O): olivine 54---262, orthopyroxene 215---263, garnet 15---74, cli...
BACKGROUND: To enhance the understanding of biological mechanisms connecting early adversity and negative health, we examine the association between family interpersonal violence and disruption and telomere length in youth. These specific exposures were selected because of their established links with negative health consequences across the life-course. METHODS: Children, age 5 to 15, were recr...
Let 7 be a (bordered) compact surface and k an integer. Suppose that we have a set 1 of pairwise nonhomotopic simple (closed) curves in 7 with the property that any two curves from 1 intersect in at most k points. It is proved that 1 cannot contain too many curves; i.e., there is a number N depending only on 7 and k such that |1 | N (Theorems 3.3 and 3.4). The same holds for nonsimple curves as...
BACKGROUND There is a renewed interest in examining the association between hip range of motion and injury in athletes, and the data on baseball players are conflicting. Understanding whether asymmetrical hip rotation is a normal adaptation or a risk factor for injury will help therapists, trainers, and physicians develop rehabilitation programs to improve kinetic energy transfer and prevent in...
INTRODUCTION Human users planning for multiple objectives in coalition environments are subjected to high levels of cognitive workload, which can severely impair the quality of the plans created. The cognitive workload is significantly increased when a user must not only cope with a complex environment, but also with a set of unaccustomed rules that prescribe how the coalition planning process ...
We live in a world increasingly dominated by networks – communications, social, information, biological etc. A central attribute of many of these networks is that they are dynamic, that is, they exhibit structural changes over time. While the practice of dynamic networks has proliferated, we lag behind in the fundamental, mathematical understanding of network dynamism. Existing research on time...
INTRODUCTION The prescribing of anti-psychotic drugs has become a normal clinical practice. METHODS This article presents a longitudinal, multicentre study of 12 months conducted on 266 children and adolescents who were prescribed a first or second generation antipsychotic drug for the first time, and the baseline results of the study. The follow-up protocol had as its purpose to detect the p...
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