Energy Dissipation and Regularity for a Coupled Navier-Stokes and Q-Tensor System

We study a complex non-newtonian fluid that models the flow of nematic liquid crystals. The fluid is described by a system that couples a forced Navier-Stokes system with a parabolic-type system. We prove the existence of global weak solutions in dimensions two and three. We show the existence of a Lyapunov functional for the smooth solutions of the coupled system and use the cancellations that allow its existence to prove higher global regularity, in dimension two. We also show the weak-strong uniqueness in dimension two

POSTURAL STABILITY PERFORMANCE BETWEEN SEDENTARY AND ACTIVE SUBJECTS WITH THE BIODEX STABILITY SYSTEM

INTRODUCTION: Postural stability (PS) has been defined as the ability to maintain an upright posture within the base of support (Lee and Lin, 2007) and is considered to be an important indicator of musculoskeletal health and physical performance. This study examined the PS performance between sedentary and active subjects using the Biodex Balance System (BBS) with well intraclass correlation coefficient (Hinman, 2000)

THE RELATIONSHIPS BETWEEN THE FUNCTIONAL MOVEMENT SCREEN AND THE POSTURAL STABILITY IN COLLEGIATE ATHLETES

The Functional Movement Screen (FMS) is a tool developed recently not only to aid in the prevention of injury by objectively measuring dysfunction and asymmetries within movement patterns, but also could be used as a baseline for further strength, conditioning, or athletic development. The purpose of this study was to examine the relationships between the scores of FMS in relation to the postural stability (PS) in collegiate athletes. A total of 30 male, basketball athletes volunteered to join this study. The PS were measured by the Biodex Balance System as the displacements of the center of foot pressure (COP) in the limits of stability. The score of FMS were evaluated by one certified professional experts. The results showed that the score of FMS has relation to the performance of the PS in a certain extent, especially in the FMS-shoulder mobility to the LOS overall level 6 (r=.26-.41), in the FMS-active straight leg raise to the LOS forward, backward, right, right-back level 6 (r=.30-.39), and in the FMS-trunk stability push-up to the LOS right, back, and right-forward. It was concluded that the score of FMS might be used to evaluate and/or predict the performance of the PS in young, collegiate athletes

Synergistic therapeutic effect of arsenic trioxide and radiotherapy in BALB/C nude mice bearing nasopharyngeal carcinoma xenografts

It has been shown that arsenic trioxide (ATO) induced apoptosis in human nasopharyngeal carcinoma cells and inhibited the growth of nasopharyngeal carcinoma xenografts (NPCX) in nude mice. Aim: The present study was designed to determine whether ATO at the non-toxic dose level could potentiate the therapeutic effectiveness of radiation therapy in nasopharyngeal carcinoma, using a BALB/C nude mouse xenograft model. Methods: The mice bearing NPCX were treated with radiation alone (2, 4, and 6 Gy), ATO alone (4 mg/kg/day x 6 days), and ATO plus radiation at the same dosage levels. Time of tumor growth delay (defined as the time necessary for the tumor to grow four-fold of its initial volume after, compared with untreated tumors) and toxic effects were determined. Results: The low dose ATO alone has no pronounced effects on tumor growth delay compared to untreated control. However, compared with radiation alone, the combined regimen delayed the tumor growth by 2–10 days and had no significant toxic effects such as the liver function damage. Conclusions: Combination of ATO at non-toxic dose level and radiation has synergistic effects on tumor growth inhibition in vivo and is well tolerated.Установлено, что триоксид мышьяка (ТОМ) индуцирует апоптоз в клетках карциномы носоглотки человека и ингибирует рост ксенографта карциномы носоглотки у атимических мышей. Цель работы — установить терапевтическую эффективность радиотерапии в комбинации ТОМ в нетоксичной дозе мышам линии BALB/ с ксенографтом карциномы носоглотки. Методы: животные с ксенографтом карциномы носоглотки получали либо только радиотерапию (2, 4 и 6 Гр) или ТОМ (4 мг/кг/день в течение 6 дней), или их комбинацию в тех же режимах и дозах. Задержку роста опухоли определяли как различие во времени, необходимом для достижения опухолью 4-кратного объема по сравнению с начальным объемом в опытной группе versus такового в контрольной группе. Результаты: введение ТОМ в низкой дозе не оказывало выраженного влияния на рост опухоли по сравнению с показателями в конт­рольной группе, а в комбинации с облучением приводило к задержке роста опухоли на 2–12 сут по сравнению с показателями у животных, получавших только лучевую терапию при отсутствии выраженных побочных эффектов. Выводы: комбинация ТОМ в нетоксической дозе и лучевой терапии приводит к ингибированию роста опухоли in vivo и не вызывает побочных эффектов. Ключевые слова: триоксид мышьяка, радиотерапия, ксенографт карциномы носоглотки

THE EFFECT OF ANKLE PLATFORM TRAINING ON ANKLE PROPRIOCEPTION IN SUBJECTS WITH UNILATERAL FUNCTIONAL ANKLE INSTABILITY

INTRODUCTION: Functional ankle instability (FAI) is defined as the subjective sensation of giving way or feeling joint instability after repeated episodes of ankle sprain (Riemann et al., 2003). The purpose of this study was to examine the effect of 12-week Biomechanical Ankle Platform System (BAPS) training on ankle reposition sense in subjects with unilateral FAI

A COMPARISON OF BALANCE CONTROL BETWEEN JAVELIN THROWERS AND BASEBALL PITCHERS

This study evaluated the balance control in javelin throwers and baseball pitchers. Twenty-four athletes took part in the study and for each we measured their static and dynamic balance by Biodex Balance System, AMTl AccuSway force plate and Y balance test. The paired t-test was conducted to compare all the variables within subjects. The independent t-test was used to compare trail leg (TL) of baseball pitchers with propulsive leg (PL) of javelin throwers and stride leg (SL) of baseball pitchers with braking leg (BL) of javelin throwers. The results showed that there was no difference between the PL and BL in dynamic and static balance in javelin throwers. However, the dynamic balance in the TL was significantly better than the SL in baseball pitchers. The static balance in the PL in javelin throwers was also better than the TL in baseball pitchers. The research improves the understanding of balance control in elite athletes

THE EFFECTS OF WHOLE-BODY VIBRATION TRAINING ON DECUPLE JUMP PERFORMANCE IN HANDBALL ATHLETES

To evaluate the effects of whole-body vibration training (WBVT) on decuple jump performance in handball athletes. Sixteen collegiate Level I handball athletes volunteered and divided equally as control group and experimental group (EG). All athletes underwent the same handball specific training, but the EG received additional WBVT (amplitude: 2 mm, frequency: 20 - 40 Hz) three time per week for eight weeks. The decuple jump (DJ) performance was evaluated by the total distance covered in ten single leg long jumps. Single factor ANCOVA was used to examine the differences in each parameter between the groups after training with the pretest values as a covariate. The statistic significance was set at p < .05. Results showed that after 8 weeks WBVT, the EG had significantly improved the total distance of DJ (25.03 ± 1.83 m vs. 26.26 ± 1.65 m, F = 5.45, p < .05). It is concluded that 8 weeks of additional WBVT could improve the decuple jump performance in handball athletes

THE EFFECT OF ANKLE PLATFORM TRAINING ON ANKLE PROPRIOCEPTION IN SUBJECTS WITH UNILATERAL FUNCTIONAL ANKLE INSTABILITY

INTRODUCTION: Functional ankle instability (FAI) is defined as the subjective sensation of giving way or feeling joint instability after repeated episodes of ankle sprain (Riemann et al., 2003). The purpose of this study was to examine the effect of 12-week Biomechanical Ankle Platform System (BAPS) training on ankle reposition sense in subjects with unilateral FAI

BETTER POSTURAL CONTROL DURING ACCURATE SHOOTING IN ELITE FEMALE BASKETBALL PLAYERS

The purpose of this study was to evaluate the differences of postural control (PC) during accurate and inaccurate shooting in elite female basketball players. 21 female professional basketball players recruited as subjects. The PC was evaluated by the Accusway as sway radius, velocity, radial and 95% area of the center of pressure (COP) during standard penalty line shooting. The results showed that the COP sway area during accurate shooting was significantly smaller than during inaccurate shooting (74.0 ± 37.9 vs. 110.6 ± 49.1, p < .05). Moreover, no significant differences were found between situations in the COP radius and velocity. This study found that during the accurate shooting, elite female basketball player had better PC which demonstrated that significant smaller COP sway area than inaccurate shooting