Background: The lip trill is a semi-occluded vocal tract exercise found to have positive outcomes on vocal parameters of healthy individuals after a single session. However, the effect of several lip trill sessions has not been studied. Objective: This study investigated the effect of a 3- to 4-week lip trill exercise program on Maximum Phonation Time (MPT), Maximum Phonation Frequency Range (MPFR), Harmonics-to-Noise Ratio (HNR), and mean Speaking Fundamental Frequency (mean SFF). Methods: Three vocally untrained healthy females with perceptually normal voices participated in a multiple-baseline, single-case experimental research. Five to seven direct training sessions were randomly assigned. Self-implementation was encouraged thereafter. Participants were assessed on all outcome measures for 15 sessions. Data were visualized and inspected. Cohen’s d was also derived using Standardized Mean Difference for single-subject research. Results: Visual and statistical analyses revealed a decreased MPT when training was introduced, increased MPFR variability during the training phase, and increased stability in mean SFF post-training. Perceived effects include vocal freedom, decreased laryngeal stress, and vocal conditioning. Vocal outcomes in one participant yielded a significant effect on MPFR and mean SFF and a small effect on HNR. Conclusion There is evidence of lip trill effect on pitch control and vocal conditioning. Findings also revealed that motivation, exercise frequency, and adherence could contribute to positive gains in vocally healthy speakers. Further investigation in consideration of the study findings and limitations is warranted.
prevention

No abstract available.
Primary Prevention*

Atrial Fibrillation ; prevention & control ; Humans ; Primary Prevention

No abstract available.
Cardiovascular Diseases* ; Primary Prevention*

Data research from 1997-2004, restrospective and cross-sectional studies were conducted every 6 months from 4/2002-4/2004 to collect data on malaria patients and the rate of malaria parasite and follow up the sectoral development of Anopheles and An. minimus at areas where interruption of vector prevention at different times: 1, 2 or 3 years showed that indicators like malaria patients, malaria patients/1000 residents and the density of malaria parasite were decreasing and stable. An.minimus recovers and increase with time. The density at 2-3 years after spraying was higher than the density at the point of spraying. An.minimus presented at all sites of the study but the density in striking people was low. If the supervision, management and treatment of malaria patients are well, the malaria situation could be kept stable even vector control methods were not used often
Malaria ; Prevention & control

This paper introduced the frequent cancers in Vietnam, the situation of the cancer prevention and control in Hanoi, especially the activities of the department of tumor of Hai Ba Trung hospital during past 10 years (1988-1999), concurrently establish the orientation, objectives of cancer prevention and control program in Hanoi from now to 2000.
neoplasms ; prevention & control

From 1994 up to now, active measures in the prevention of cholera have been implementing in Thua Thien Hue province, by the proper investment for safe water supplying, waste treatment, sewage treatment, sanitary-food safety examination and control of chloride content in safe water system, close supervise and soon discovery of patients with cholera, quick and strict responding to the epidemic so that limiting and decreasing significantly the mortality.
Cholera ; prevention & control

Some algorithms used in UV-Vis MCA spectrophotometry technique and some recent statistical approaches to the Advanced MCA technique were described. A number of pharmaceutical formulas containing 2-4 ingredients has been analyzed successfully using MCA technique. Basing on the basic algorithm of MCA and its statistical approaches, an applicable software for data processing had been established (running in Windows (environment - IBM compatible computer). This enables to use MCA technique for conventional spectrophotometers.
Pharmaceutical Preparations ; prevention & control

In 2003, due to practice effectively malaria prevention programs and intensify supervise malaria epidemiology that malaria prevention in Tuyen Quang provice had good results, gained 3 aims: malaria morbidity reduced 28%, malaria mortality 0%. Malaria epidemiology was stable in Tuyen Quang. However, in 15 malaria parasites in Tuyen Quang in 2003, there was 14 was exotic malaria parasites from the South and other provinces. Therefore, in the later years, beside the investigation, management of Ministy of Health, the government project for malaria prevention, National Institute of Malariology - Parasitology - Entomology, Tuyen Quang needed to implement well malaria epidemiological surveillance in basic levels and malaria preventive plan to maintain gained malaria preventive results
malaria ; epidemiology ; prevention & control

The conference "Enhance the ability for malaria prevention of some provinces in Tay Nguyen the second time" was held in Da Lat, Lam Dong province on 22 November 2004 by the Ministry of Health. Assessmentary the situation of malaria in this area showed that: There was without malaria outbreak; the mortality of malaria decreased 62.5% (in quantity) and 63.3% (rate of population). The infection of malaria fell down by 30,9% (in quantity) and 26.3% (rate of population). It is the first time for many years, the mortality and the infection rate of malaria in the year on year basic in Tay Nguyen - Binh Phuoc areas reached lower level compared with the whole country. The main causes as followed: There were time by instructions from the Ministry of Health's leaders; The national project on malaria prevention, the Institutes for malaria - parasite - insect. The main measures included: continueing to strenthen the socialization >?< for malaria prevention; Mobilizing all resources from the central to the local level, from the community, from the International projects; Enhancing progranda on health education - malaria prevention
Malaria ; prevention & control ; epidemiology