动动手指,给五官减龄

按一按,缓解眼疲劳俗话说:眼睛是心灵的窗户,但现在用眼过度已经成了危害健康的普遍问题,人们热衷于用电脑处理各种公文、邮件,看电影或浏览新闻,常常一坐就是几个小时。一旦告一段落,才发现自己不但腰酸背痛,眼睛也出现酸涩、呆滞、红血丝等疲劳表现,甚至有人因此出现视力下降等问题。这让曾经灵动、清澈的眼眸一下失去光彩,整个人也失去几分精气神。为了改善眼睛的疲劳现象.

动动手 动动脑

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动动手

五一劳动节将至，请您在“山西老年祝全省人民五一劳动节快乐”贺词下面的空格里填上适当的字，使其组成16条成语、短语等，以增添您的乐趣，好吗？

谈高中生物学教学中的“舍”

在高中生物学教学中，以学生学会学习和终身发展为主旨，从舍一点时间倾听学生、动动手和联系生活几方面进行了尝试与反思。

浅谈初中生物教材小栏目的教学处理

文章阐述了如何处理初中生物教材小栏目,使之为教学服务,从而激发学生的学习兴趣,培养学生的创新能力和科学素质,提高教学效率.

Surgical Significance of the Aortic Root and its Neighbouring Structure Relationships

Objective: To measure the calibration of different levels in aortic root andevaluate the relationships between the aortic sinuses and its neighbouring structure. Methods:Thirty heart specimens from cadaver of normal adult were studied. The dimensions of four levels inaortic root were measured and the relationships between the aortic sinues and its neighbouringstructure were observed. Results: The dimensions of four levels in aortic root obtained as follows;Sinus > STJ1 > STJ0 > Base (P < 0.05) . The dimensions of the aortic valve leaflets were measured.The right coronary leaflet was larger than those of the left coronary and noncor-onary leaflets .But there was no statistical signiftcane (P > 0.05) . The relationships between the middle axis ofthe anterior valve of the bicuspid valve and the aortic sinuses were examined. The middle axis ofthe anterior valve in 26 specimens (86.6%) located between the left coronary sinus and thenoncoronary sinus . The relationship between the aortic prominence of the right atrium and theaortic sinuses was examined. The aortic prominence was formed from noncoronary sinus in 22 specimens(73.3%) . The relationship between the middle point of the right and left pulmonary valves and theaortic sinuses was examined. The middle point of the right and left pulmonary valves in 24 specimens(80%) was faced to the point between the right and left aortic sinuses . Conclusion: The dimensionof the four levels in aortic root is as follows, sinus > STJ1 > STJ0 > Base (P < 0.05) . There wasno statistical significance in the size of the three aortic valve leaflets (P > 0.05).

The Development of Dynamic Compliant Wrist for Robots

Based on an analysis of the relative shaft-to-hole position and attiude errors, as well as of the mechanics and Kinematics in the process of automatic assembly of industrial robots, the paper studies the principle of construction of dynamic wrists. Type I-3 and Ⅱ-6 dynamic compliant wrists have been designed and made. Prblems in the production of compliant elements and the connection between compliant elements and wrists were also solved. A study on the results of tests of the function of two kinds of dynamic compliant wrists shows that the dynamic compliant wrist's compliancy function can be improved by adding metallic materials having higher longitudinal and transverse rigidity into the softer elstomer. And the design Principle is proved to be feasible and practicable. It can be expected that the use of dynamic compliant wrist will greatly lower the technical requirements of the shaft-hole assembly and the requirements in the resetting accuracy.

Design of wearable hand rehabilitation glove with soft hoop-reinforced pneumatic actuator

Traditional hand rehabilitation gloves usually use electrical motor as actuator with disadvantages of heaviness,bulkiness and less compliance.Recently,the soft pneumatic actuator is demonstrated to be more suitable for hand rehabilitation compared to motor because of its inherent compliance,flexibility and safety.In order to design a wearable glove in request of hand rehabilitation,a soft hoop-reinforced pneumatic actuator is presented.By analyzing the influence of its section shape and geometrical parameters on bending performance,the preferred structure of actuator is achieved based on finite element method.An improved hoop-reinforced actuator is designed after the fabrication and initial measurement,and its mathematical model is built in order to quickly obtain the bending angle response when pressurized.A series of experiment about bending performance are implemented to validate the agreement between the finite element,mathematical and experimental results,and the performance improvement of hoop-reinforced actuator.In addition,the designed hand rehabilitation glove is tested by measuring its output force and actual wearing experience.The output force can reach 2.5 to 3 N when the pressure is 200 kPa.The research results indicate that the designed glove with hoop-reinforced actuator can meet the requirements of hand rehabilitation and has prospective application in hand rehabilitation.

HIT prosthetic hand based on tendon-driven mechanism

An underactuated finger structure actuated by tendon-driven system is presented.Kinematics and static analysis of the finger is done,and the results indicate that the prosthetic finger structure is effective and feasible.Based on the design of finger,a prosthetic hand is designed.The hand is composed of 5 independent fingers and it looks more like humanoid.Its size is about 85% of an adult's hand and weights about 350 g.Except the thumb finger,each finger is actuated by one DC motor,gear head and a tendon,and has three curling/extension joints.The thumb finger which is different from other existing prostheses is a novel design scheme.The thumb finger has four joints including three curling/extension joints and a joint which is used to realize the motion of the thumb related to the palm,and these joints are also driven by one DC motor,harmonic drive and a tendon.The underactuation and adaptive curling/extension motion of the finger are realized by joint torsion springs.A high-powered chip of digital signal processing(DSP)is the main part of the electrical system which is used for the motors control,data collection,communication with external controlling source,and so on.To improve the reliability of the hand,structures and sensors are designed and made as simply as possible.The hand has strong manipulation capabilities that have been verified by finger motion and grasping tests and it can satisfy the daily operational needs and psychological needs of deformities.

Effects of core and non-dominant arm strength training on drive distance in elite golfers

Background： Various training schemes have sought to improve golf-related athletic ability. In the golf swing motion, the muscle strengths of the core and arms play important roles, where a difference typically exists in the power of arm muscles between the dominant and non- dominant sides. The purposes of this study were to determine the effects of exercises strengthening the core and non-dominant arm muscles of elite golf players （handicap 〈 3） on the increase in drive distance, and to present a corresponding training scheme aimed at improving golf performance ability. Methods： Sixty elite golfers were randomized into the control group （CG, n = 20）, core exercise group （CEG, n = 20）, and group receiving a combination of muscle strengthening exercises of the non-dominant arm and the core （NCEG, n = 20）. The 3 groups conducted the corresponding exercises for 8 weeks, after which the changes in drive distances and isokinetic strength were measured. Results： Significant differences in the overall improvement of drive distance were observed among the groups （p 〈 0.001）. Enhancement of the drive distance of NCEG was greater than both CG （p 〈 0.001） and CEG （p = 0.001）. Except for trunk flexion, all variables of the measurements of isokinetic strength for NCEG also showed the highest values compared to the other groups. Examination of the correlation between drive distance and isokinetic strength revealed significant correlations of all variables except trunk flexion, wrist extension, and elbow extension. Conclusion： The combination of core and non-dominant arm strength exercises can provide a more effective specialized training program than core alone training for golfers to increase their drive distances.

Comparison of very-high-frequency ultrasound assessment of radial arterial wall layers after first and repeated transradial coronary procedures

Background Transradial coronary procedure （TRP） traumatizes the radial artery （RA）, especially resulting in changes to arterial wall morphology. This study explored the significance of the early onset of traumatic effects to wall layers of the RA following the first TRP （FTRP） and repeat TRP （RTRP） using very-high-frequency ultrabiomicroscopy （VHFUBM）. Methods A total of 1431 patients that re- ceived TRP were divided into the FTRP group that comprised 781 patients and the RTRP group that comprised 650 patients depending on the number of procedures. Two-dimensional RA images were acquired by 30-55 MHz ultrasound one day before and one day after the pro- cedure. Results After TRP, the incidence of intimal tears, medial dissections and external elastic lamina fracture were greater in the RTRP （P 〈 0.001）. The RTRP group showed significantly thicker intimal thickness （IT）, media thickness （MT）, adventitia thickness and all complex layer thicknesses as compared with the FTRP group （P 〈 0.001）. Conclusions Multivariate linear regression analysis discovered that repeated TRP and other observations were independent predictors of increased IT in post-operative RA. VHFUBM provides an approach to study structural and histopathological injury in the wall layers of RA which showed increased trauma to the RA following RTRP.

Motor Compatibility Effect on the Comprehension of Complex Manual Action Sentences in L2:An ERP Study

Embodiment theories proposed that the comprehension of language involves sensory-motor simulation in the brain.The present study examined the brain response to motor compatibility effect in comprehending action-related linguistic materials for participants learning Chinese as a second language(L2).In this study,participants are required to read action-related sentences describing an agent performing two manual actions simultaneously or sequentially by manipulating temporal conjunctions.The sentences with simultaneous actions are marked by Chinese parallel structure一边……一边……(“while”)showing non-congruent motor condition while the sequential action sentences are marked by先……然后……(“after”)showing congruent motor condition.Event-Related Potentials(ERPs)were recorded with the second verb phrase.A larger fronto-central late positivity was observed for the sentences with simultaneous actions rather than the sentences with sequential actions due to body constraints,revealing that late L2 Chinese learners integrate embodied knowledge while processing action-related complex sentence despite demanding more cognitive resources,and longer processing time.

SURGICAL MANAGEMENT OF PSEUDOANEURYSM COMPLICATING ARTERIOVENOUS FISTULA FOR HEMODIALYSIS

Objective To report surgical experience in pseudoaneurysm (PA) repair of arteriovenous fistula (AVF) for renal hemodialysis. Methods Twenty patients undergoing PA repair of AVF for renal hemodialysis were treated in Central Hospital Conde S. Januario of Macao. Sixteen patients had PAs of AVF in upper extremities, 4 in lower extremities. All patients were treated with surgical therapy. Results All operations were finished without death. One patient suffered from acute thrombosis, recovered without any complication through instant thrombectomy. One patient with postoperative incision bleeding recovered after low molecular weight heparin was ceased. And one AVF could not be mature six weeks later, was recovered after ligation of branch vein. And one patient died due to recurrent cerebral infarction. Conclusion Surgical repair is the best choice for PA of AVF for renal hemodialysis.

ARTERIAL SWITCH OPERATION FOR COMPLETE D-TRANSPOSITION OF THE GREAT ARTERIES: SURGICAL RESULTS AND ANALYSIS

Objective To review and analyze the surgical results of arterial switch operations in complete D-transposition of the great arteries （TGA）. Methods A total of 113 patients underwent arterial switch operation from Jan. 2001 to Dec. 2005. There were 60 patients with transposition of the great arteries and intact ventricular septum （TGA/IVS） and 53 patients with transposition of the great arteries and ventricular septal defect （TGA/VSD）. The lowest body weight was 2. 3 kg and the smallest age was 6 h. The arterial switch operation was performed under deep hypothermia with circulatory arrest and low-flow perfusion. Results The total mortality was 9. 73%. There were 5 deaths in TGA/IVS （8.3%）, 6 deaths in TGA/VSD （ 11.3% ）. With the development of surgical technique, peri-operative management and cardiopulmonary bypass, the total mortality significantly decreased from 16. 65% in the early times to 5. 5% lately. Conclusion The vital risk of the operation is coronary artery malformation. The incidence of coronary artery malformation is higher in TGA/VSD than in TGA/ [VS. The positional relationship of the great arteries does not affect the results of the operation. The arterial switch operation should be prevented when the pressure ratio between the left and right ventricle is less than 0.6, otherwise it is great likely to cause severe low cardiac output postoperatively.

Primary biliary cirrhosis after aortoiliac reconstruction surgery using a Y-graft: A case report

Primary biliary cirrhosis (PBC) is an autoimmune disease characterized by anti-mitochondrial antibodies and destruction of intra-hepatic bile ducts. Though little is known about the etiology of PBC, some reports suggest that xenobiotics and viral infections may induce PBC. We describe a case of PBC after the aortoiliac reconstruction surgery using a Y-graft.

Thoraco-abdominal Aorta Revascularization through a Retroperitoneal Approach

Objective To investigate the application of the retroperitoneal approach in aortic surgery. Methods We collected and analyzed data of 7 patients in Macao who presented with aortic diseases from 2007 to 2008 and were treated with aorta repair through retroperitoneal approach. Demographic features as well as intraoperative and postoperative data were analyzed. One case of thoracoabdominal aneurysm and 4 cases of abdominal aneurysm received artificial graft, among which hybrid iliac artery reconstruction with Zenith stent covering the ostium of the left subclavian artery was performed in 2 cases of infrarenal abdominal aneurysm. Aortic-iliac artery bypass was performed in 2 cases of aortoiliac occlusion. Results No operative or early postoperative death was observed. No perioperative intestinal adhesion or ureteral obstruction was found. One case reported delayed paraplegia and graft infection as postoperative complications. The complications were partially removed 3 months later after rehabilitation. Conclusion Retroperitoneal approach is a safe and feasible technique, which associated with a low incidence of postoperative pulmonary complications.

A Highly Sensitive Femtosecond Time-Resolved Sum Frequency Generation Vibrational Spectroscopy System with Simultaneous Measurement of Multiple Polarization Combinations

Characterization of real-time and ultrafast motions of the complex molecules at surface and interface is critical to understand how interracial molecules function. It requires to develop surface-sensitive, fast-identification, and time-resolved techniques. In this study, we employ several key technical procedures and successfully develop a highly sensitive femtosecond time-resolved sum frequency generation vibrational spectroscopy （SFG-VS） system. This system is able to measure the spectra with two polarization combinations （ssp and ppp, or psp and ssp） simultaneously. It takes less than several seconds to collect one spectrum. To the best of our knowledge, it is the fastest speed of collecting SFG spectra reported by now. Using the time-resolved measurement, ultrafast vibrational dynamics of the N-H mode of α-helical peptide at water interface is determined. It is found that the membrane environment does not affect the N-H vibrational relaxation dynamics. It is expected that the time-resolved SFG system will play a vital role in the deep understanding of the dynamics and interaction of the complex molecules at surface and interface. Our method may also provide an important technical proposal for the people who plan to develop time-resolved SFG systems with simultaneous measurement of multiple polarization combinations.

The effects of basketball on students＇ social adaptation ability and mental health

After several years of intense study, the most urgent problem those college students must face is employment, what＇ s more, with the sustaining development of China＇ s economy and the accelerating pace of social progress, the society shows much more need for the comprehensiveness and adaptation ability of talents. However, under the influence of long-term examination-oriented education, college students are only content with the courses required now which leads to the lack of large scope of expertise and ability to solve practical problems, being narrow-minded, and having poor flexibility, creativity and manipulative ability. With the addition of the significant differences between the campus and the society, many college graduates always have the feeling of maladjuslanent when entering the society, for example, they are usually lack of effective learning methods, strong social responsibilities and self-learning abilities and have poor understanding and mastery of professional knowledge, poor unity consciousness, poor manipulative ability in social practices and poor cognitive competence, furthermore ,they tend to have great intercommunicative obstacles and can not evaluate themselves and others correctly.

SMS-Parking Service Introduced in Oman

Mobile computing has increased quite rapidly over the past few years. The major drivers of mobile computing are large number of mobile phone users. As their number is increasing worldwide, different organizations are offering their services using the mobile devices. Oman is a developing country that strives to adapt M-services. The number of mobile phone users in Oman increased substantially since its launch in 1996. Prepaid mobile services and SMS （Short Message Services） were introduced in 2001 and both are currently popular with subscribers. Such fine appeal influenced many government organizations to go mobile with their services. This paper describes the SMS-Parking service, which is introduced recently by a joint venture of the Muscat Municipality and the Oman Mobile company offering mobile services to its citizens and reports the initial feedback of its users. This study shows that the new service is not yet popular among its users and may need their more positive attitudes toward it for its quick adoption.

Determination of the Biosorption of Cd（ II ） by Coconut Fiber

The coconut fiber is produced in large quantities in Brazil, even though very small quantities are being used by some industries, mainly cordage mats and handicrafts. An alternative usage would be the use of these fibers in biosorption of heavy metals from aqueous solutions. This present study aimed to evaluate the potentiality of cadmium biosorption by coconut fiber. The coconut fibers were used at kinetic analysis, influence ofpH and adsorption isotherms were also carried out. It can be concluded that there is great potential for the use of coconut fiber, and the optimum pH for adsorption was around 5.0. The adsorption kinetics is fast and equilibrium occurs within 120 min. The Langmuir isotherm was considered the most suitable to describe the experimental data.