Excellent mutilmedia courseware is the base to ensure teaching effect. Making excellent mutilmedia courseware by Director can make mutilmedia courseware more beautiful and have much more interaction and expressive force.

In order to further promote friendly cooperation with developing countries, Chinese government has been committed to increasing the intensity of cooperation and human resource development among developing countries. Healthcare is one of the key areas of China’s foreign aid. This article described the general conditions and experiences of national foreign aid training projects for developing countries undertaken by the Beijing Traditional Chinese Medicine Hospital and Beijing Traditional Chinese Medicine Research Institute. From aspects of participant enrollment, training program implementation, and training feedback, the training mode of national foreign aid on traditional medicine was introduced. This article focused on the selection of teachers, preparation of professional textbooks, and evaluation of teaching quality. Training programs over the years were guided by clear training concepts and accurate goal settings, which provided a useful exploration for the personnel training mode of national foreign aid on traditional medicine.

In order to improve the speech quality and auditory perceptiveness of electronic cochlear implant under strong noise background, a speech enhancement system used for electronic cochlear implant front-end was constructed. Taking digital signal processing (DSP) as the core, the system combines its multi-channel buffered serial port (McBSP) data transmission channel with extended audio interface chip TLV320AIC10, so speech signal acquisition and output with high speed are realized. Meanwhile, due to the traditional speech enhancement method which has the problems as bad adaptability, slow convergence speed and big steady-state error, versiera function and de-correlation principle were used to improve the existing adaptive filtering algorithm, which effectively enhanced the quality of voice communications. Test results verified the stability of the system and the de-noising performance of the algorithm, and it also proved that they could provide clearer speech signals for the deaf or tinnitus patients.
Algorithms ; Cochlear Implantation ; Cochlear Implants ; Electronics ; Humans ; Noise ; Signal Processing, Computer-Assisted ; Speech ; Speech Perception

BACKGROUND:Integfin levels can affect cellular function,regulate bone formation and bone resorption.However,this process need activated by other factors,whether recombinant human bone morphogenetic protein 2 (rhBMP-2)has this effect is poorly understood.OBJECTIVE:To study the effects of the different concentration of rhBMP-2 on the expression of inergrin β_1 during the mandibular dfScraction in rabbits.DESIGN,TIME AND SETTING:The randomized,controlled.animal grouping experiment of histological observation was performed at the Animal ExperimentaI Center and Immunohistochemistry Center of Liaoning Medical University from May 2006 to May 2007.MATERIALS:A total of 45 Japanese white rabbits were used.rhBMP-2 was supplied by Beijing Academy of Military Medical Sciences.METHODS:The rabbits were prepared for mandibular distraction models and randomly assigned into control,1.5 mg rhBMP-2 and 3.0 mg rhBMP-2 groups.with 15 animals in each group.Collagen sponge and collagen binding proteins were implanted into mandibles of rabbits,respectively,and distraction 0.4 mm per time,twice per day for 5 days.The mandibles were lengthened 4 mm.MAIN OUTCOME MEASURES:The expression of integrin 131 was detected using immunohistochemistry at days 1,3,7,14,and 28 after distraction.RESULTS:All rabbits were included in the final analysis.The integdn β_1 mainly expressed at 7 days after distraction.At the same time point.when concenrtation rhBMP-2 was increased,the positive integrin β_1 rate and positive stained area percentage were increased(P<0.05).Compared to the same concentration,the positive integrin β_1 rate and positive stained area percentage were gradually increased as time prolonged (P<0.05).CONCLUSION:The integdn β_1 expression can be promoted by rhBMP-2 at the anaphase of mandibular distraction osteogenesis in a concentration-dependent manner.

To clarify the relationship between angiotensin converting enzyme (ACE) gene insertion/deletion (I/D) polymorphism and diabetic retinopathy in type 2 diabetic patients by meta analysis. 16 eligible articles were selected in this study, including 1 014 patients with diabetic retinopathy and 1 135 controls. The meta analysis revealed that systematic data Z= 2.91 ( P = 0.004 ), OR = 1.69 ( 95% CI 1.19-2.40). There is association between ACE gene I/D polymorphism and the diabetic retinopathy in type 2 diabetic patients.

Objective To investigate the hemodynamic characteristics of superior thyroid artery and its corresponding clinical significance with patients of Graves'hyperthyroidism.Methods Thirty patients with Graves'hyperthyroidism received Doppler ultrasonography.Patients were grouped with different serologic indices at 4 month after radioiodine therapy as relief(R),uncured(U)and hypothyroidism(H).The relationships between thyroid volume(V),superior thyroid artery peak systolic velocity(PSV),end diastolic velocity(EDV),RI,PI and systolic accelerating time(SAT)and the 4-month outcome were analyzed respectively.Results Besides the effect of 24 h-131I uptake rate on patients'short-term outcome,V,PSV and RI were of predominate prognosis value(P＜0.01).PSV and V of group R were positively correlated with 131I dose respectively(r1=0.825,r2=0.697;P＜0.001),while SAT of group R was negatively correlated with 131I dose(r=-0.489,P＜0.05).Conclusions Patients with high V,PSV and RI maybe still suffering hyperthyroidism after regular dosage of 131I therapy.Doses of 131I should be added appropriately for patients with high PSV and V,but short SAT to achieve complete remission,while it should be reduced for patients in opposite condition to avoid occurrence of hypothyroidism.

BACKGROUND: Disturbance of lipid metabolism is responsible for many kinds of diseases, and to screen safe and effective prescription for lipid reduction has clinical significance.OBJECTIVE: To study the influence of puerarin-arginine composition on lipid metabolism in rats.DESIGN: Comparative observing study based on animal model.SETTING: Experimental animal center and department of biochemistry in a military hospital of Chinese PLA.MATERIALS: This study was carried out at the Experimental Animal Center and Department of Biochemistry of the General Military Hospital of Chinese PLA between May and August 2004. Eighty Wistar rats were randomly divided into high dosage, middle dosage, low dosage group and control group with 10 male and 10 female rats each.METHODS: Rats took food freely, and experimental groups were supplemented with puerarine-arginine composition of different dosage (0, 0.93,1.39 and 1.85 g/kg) for observing the influence on rats.MAIN OUTCOME MEASURES:① blood parameters; ② change of body mass and utilization rate of food; ③ parameters of vital organs;④histopathological changes.RESULTS: From onset of the second week, body mass of both male and female rats in experimental groups were found obviously lower than those in control group. The levels of blood cholesterol in female rats were(1.63 ±0.20) and (1.29 ±0.23) mmol/L in 0.93 g/kg dosage group and control group respectively, and were(1.75 ±0. 13) and(1.31 ±0. 19) mmol/L in male rats,and both have statistical significance( F = 6.43, 6. 58, P ＜ 0. 05).Fatty parameters of the three experimental groups were found obviously lower as comparing with those of control group.CONCLUSION: Such composition has been proved to be able to exert function in lipid reduction by decreasing body mass, and improving utilization rate of food and proportion of cholesterol and organic fat.

Myeloid-derived suppressor cells (MDSCs) play an important immunosuppressive role during the tumor development process.And the progression of many tumors are always accompanied with abnormal accumulation of MDSCs.Moreover,both the accumulation and functions of MDSCs could be affected by complicated factors.Therefore,how to effectively reduce the immunosuppressive effects of MDSCs in oncotherapy has become the focus of scholars.Recent studies show that anti-tumor drugs can affect many biological behaviors of MDSCs.

Sepsis is systemic inflammatory response syndrome associated with infection.Early recognition of severe sepsis or septic shock,early hemodynamic resuscitation and the immediate initiation of effective intravenous anti-infective therapy are the cornerstones in the management of patients with sepsis.The infectious microorganisms associated with sepsis in pediatric patients vary with the patient's age and immune status.Initial empirical antimicrobial therapy should include one or more drugs that have activity against all likely pathogens and that penetrate in adequate concentrations into the presumed source of sepsis.Empirically therapy should be de-escalated to the most appropriate single therapy as soon as the susceptibility agent is known.

The combination of medical humanistic spirit and medical scientific spirit is the sign of the maturity of medicine.The modern medical mode of ' biology-psychology-society-environment' sets new requirements for medical humanistic education.Clinic medical postgraduates,the front -line medical workers,play a very important role in medical work,but they show huge deficiency in interpersonal communication,humanistic knowledge and humanistic possession nowadays.The paper tried to draw some lessons from the successful education mode of George Washington university and discussed practicable methods to improve humanistic education among medical postgraduates aiming at cultivating qualified medical workers who have both noble medical ethics and perfect medical technology and ability.