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.
Coronary Disease* ; Secondary Prevention*

Humans ; Pneumoconiosis ; 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

Dac Lac is a mountainous province in the centre of Vietnam with the population of 1,735,501 people, 13 districts, 1 town, 165 communes, 2,207 hamlets. The population and ethics in Dac Lac province increase rapidly due to freedly migrated of the people from the whole country, from 1985 up to now. Those characteristics together with complex geographical condition and the largest area of the country, forests, together with low mountains, so malaria in Dac Lac province has annualy the highest incidence and mordarity of the whole country. The situation of malaria in Dac Lac province decrease and stabilized in July 2004. In order to continuing decrease and stabilize the malaria, in Dac Lac province, it must be continue to strengthen the control of malaria, implement the plan of malaria prevention, consolidate the basic network of health and speciality of malaria
Malaria ; epidemiology ; prevention & control

Humans ; Silicosis ; prevention & control

No abstract available.
Cardiovascular Diseases* ; Primary Prevention*

Bac Can Centre of Preventive Health has not established the required departments as set forth in decision numbered 2468/1999/QD-BYT yet. There was a shortage of specialized staff, in terms of the number and quality. Moreover, the center' facilities and equipment have not been as proper as its functions. The centers' capacity has concentrated on the scope of epidemic control, health program management, and information technology application. Technical support will be provided with the mode of hand-on-practice for certain subjects
health ; prevention & control