MyMedR

Chong YH

Med J Malaysia, 1986 Mar;41(1):1-3.

Matched MeSH terms: Nutritional Physiological Phenomena*

Fulltext Synchronisation of output voltage waveforms in phase synchronous inverter with LCL filter for smart grid systems

Tawfikur Rahman, Ibrahimy, M.I., Motakabber, S.M.A.

Pertanika Journal of Science & Technology, 2017;25(107):145-156.

MyJurnal

A new smart grid system is widely used for energy supply system because it is simple, available, low cost, high efficiency and environmentally friendly. Conventionally, inverter techniques are utilised to convert input DC into output AC with the same frequency and phase. This process suffers the same problem which is a higher harmonic distortion, phase synchronisation, lower quality of waveform and long distance, among others. In this paper, three phase synchronous inverters (PSI) were used to direct synchronous PWM control, LCL filter, three phase RLC load, three phase Yg-Delta transformer, 5 km feeder with 2 MW load. PWM was used to generate the pulse signal for synchronisation. However, LCL filters were used to remove the noise in inverter output and transformer output side of the design. A balanced three phase load (10 kVAR) and also the input DC voltage 500 V were considered in this design. Three phase transformer (100kVA/260V/25kV) was used to increase the inverter output voltage and current with the fundamental frequency (50 Hz). The system conversion efficiency was 99.96% and phase synchronous error for each phase was approximately 4.5 degrees.

Matched MeSH terms: Cardiovascular Physiological Phenomena

Fulltext Analysis of AC - to - DC uncontrolled converters harmonics for electric vehicles applications

Shaker M. Khudher, Ishak Aris, Nashiren F. Mailah, Sahbudin, R.K.Z.

Pertanika Journal of Science & Technology, 2017;25(102):283-290.

MyJurnal

This paper discusses the harmonic analysis of the AC-to-DC uncontrolled converters commonly used in electric vehicles charging station. The aim of this paper is to model and simulate different rectifier models in addition to explaining the differences in input current harmonics, the total Harmonic Distortion (THD) as well as the power factor (pf). The converter configurations include single-phase bridge, 6-pulse and 12-pulse rectifier circuits. The single phase is normally used for electric scooter charging, while three-phase converters can be used for both electric bus and car charging. The circuit configurations of the rectifiers were modelled and simulated using Matlab R2014a to achieve the objective of the study. The results revealed that the THD levels were extremely high which is unacceptable if the system is connected to the utility grid.

Matched MeSH terms: Cardiovascular Physiological Phenomena

Fulltext Intersection and Complement Set (IACS) Method to Reduce Redundant Node in Mobile WSN Localization

Mohd Zaid Harith MZ, Mohamed Noor N, Idna Idris MY, Mohd Tamil E

Sensors (Basel), 2018 Jul 19;18(7).

PMID: 30029508 DOI: 10.3390/s18072344

The majority of the Wireless Sensor Network (WSN) localization methods utilize a large number of nodes to achieve high localization accuracy. However, there are many unnecessary data redundancies that contributes to high computation, communication, and energy cost between these nodes. Therefore, we propose the Intersection and Complement Set (IACS) method to reduce these redundant data by selecting the most significant neighbor nodes for the localization process. Through duplication cleaning and average filtering steps, the proposed IACS selects the normal nodes with unique intersection and complement sets in the first and second hop neighbors to localize the unknown node. If the intersection or complement sets of the normal nodes are duplicated, IACS only selects the node with the shortest distance to the blind node and nodes that have total elements larger than the average of the intersection or complement sets. The proposed IACS is tested in various simulation settings and compared with MSL* and LCC. The performance of all methods is investigated using the default settings and a different number of degree of irregularity, normal node density, maximum velocity of sensor node and number of samples. From the simulation, IACS successfully reduced 25% of computation cost, 25% of communication cost and 6% of energy consumption compared to MSL*, while 15% of computation cost, 13% of communication cost and 3% of energy consumption compared to LCC.

Matched MeSH terms: Physiological Phenomena

Tool life of Tia1N PVD coated carbide tool in high-speed end milling of untreated inconel 718 under minimum quantity lubrication condition

KASIM M, CHE HARON C, GHANI J, GUSRI A, YAZID M, SULAIMAN M

Sains Malaysiana, 2013;42:1721-1726.

This paper presents the tool life of the end milled Inconel 718, which is part of a material that is difficult to be machined. Previous researchers found that tool life in machining aged Inconel 718 is shorter compared with other materials. However, this observation required further investigation. Thus, a raw grade Inconel was proposed in this experiment. The experiments were performed using TiAlN-coated carbide. The studied milling parameters were the cutting speed, Vc, from 90 to 150 m/min; feed rate, fz, from 0.15 to 0.25 mm/rev; depth of cut, ap, from 0.3 to 0.5 mm; and radial depth of cut, ae=1 mm. The application of the cutting fluid used in this experiment was a minimum quantity lubricant, which had the advantage of cooling effectiveness and low consumption of cutting fluid. The results showed that the feed rate, fz, was the primary factor controlling the tool life. The combination of Vc=115 m/min, fz=0.15 mm/tooth, as well as ap=0.5 mm and ae=0.15 mm gave the longest tool life that served 95.38 min in operation.

Matched MeSH terms: Physiological Phenomena

Proceedings of the 4th Nestle Nutrition Workshop on Clinical Nutrition. Kuala Lumpur, Malaysia, November 1999

Nestle Nutr Workshop Ser Clin Perform Programme, 2000;4:V-XV, 1-300.

PMID: 11808494

Matched MeSH terms: Nutritional Physiological Phenomena*

Curriculum mapping of dental physiology curriculum: The path towards outcome-based education

Vashe A, Devi V, Rao R, Abraham RR

Eur J Dent Educ, 2020 Aug;24(3):518-525.

PMID: 32314484 DOI: 10.1111/eje.12531

INTRODUCTION: Curriculum mapping provides a clear picture of curriculum content, learning opportunities and assessment methods employed to measure the achievement of learning outcomes with their interrelationships. It facilitates educators and teachers to examine the extent to which the curricular components are linked and hence to find out gaps in the curriculum. The objective of the study was, therefore, to evaluate the physiology curriculum of Bachelor of Dental Surgery (BDS) programme through curriculum mapping.

MATERIALS AND METHODS: In this study, mapping of the physiology curriculum of three batches of BDS programme was conducted retrospectively. The components of the curriculum used for mapping were expected learning outcomes, curriculum content, learning opportunities, assessments and learning resources. The data were gathered by reviewing office records.

RESULTS: Descriptive analysis of the data revealed reasonable alignment between the curriculum content and questions asked in examinations for all three batches. It was found that all the expected learning outcomes were addressed in the curriculum and assessed in different assessments. Moreover, the study revealed that the physiology curriculum was contributing to majority of the programme outcomes. Nevertheless, the study could identify some gaps in the curriculum, as well.

CONCLUSION: This study revealed that majority of the components of the curriculum were linked and contributed to attaining the expected learning outcomes. It also showed that curriculum mapping was feasible and could be used as a tool to evaluate the curriculum.

Matched MeSH terms: Dental Physiological Phenomena*

Fulltext Role of Plant Growth Promoting Rhizobacteria in Agricultural Sustainability-A Review

Vejan P, Abdullah R, Khadiran T, Ismail S, Nasrulhaq Boyce A

Molecules, 2016 Apr 29;21(5).

PMID: 27136521 DOI: 10.3390/molecules21050573

Plant growth promoting rhizobacteria (PGPR) shows an important role in the sustainable agriculture industry. The increasing demand for crop production with a significant reduction of synthetic chemical fertilizers and pesticides use is a big challenge nowadays. The use of PGPR has been proven to be an environmentally sound way of increasing crop yields by facilitating plant growth through either a direct or indirect mechanism. The mechanisms of PGPR include regulating hormonal and nutritional balance, inducing resistance against plant pathogens, and solubilizing nutrients for easy uptake by plants. In addition, PGPR show synergistic and antagonistic interactions with microorganisms within the rhizosphere and beyond in bulk soil, which indirectly boosts plant growth rate. There are many bacteria species that act as PGPR, described in the literature as successful for improving plant growth. However, there is a gap between the mode of action (mechanism) of the PGPR for plant growth and the role of the PGPR as biofertilizer-thus the importance of nano-encapsulation technology in improving the efficacy of PGPR. Hence, this review bridges the gap mentioned and summarizes the mechanism of PGPR as a biofertilizer for agricultural sustainability.

Matched MeSH terms: Bacterial Physiological Phenomena*

Stress stabilisation behaviours in skin under small tensile loads in vitro

Wan Abas WA

Biomed Mater Eng, 1995;5(2):59-63.

PMID: 7655319

The response of human skin to "stress relaxation" tests at low loads in vitro was investigated. A number of behaviours, other than those already well established and documented, were observed. The significant behaviours are pure recovery and relaxation-recovery. Other behaviours observed are temporary stress recovery during the relaxation process, and momentary sudden non-linear drop in stress value followed by a second relaxation. The pure recovery and relaxation-recovery responses are repeatable. The latter represents the transitional response between the well-known behaviour of stress relaxation and the behaviour of stress recovery.

Matched MeSH terms: Skin Physiological Phenomena*

Nutrition and socio-economic development in Southeast Asia

Florentino RF, Pedro RA

Proc Nutr Soc, 1992 May;51(1):93-104.

PMID: 1508934

While most Third World countries, particularly in Africa and Latin America, have experienced a deterioration in child welfare as a result of the severe economic downturn in the 1980s, Southeast Asia in general managed to sustain improvements in the situation of its children because it has maintained satisfactory rates of economic growth. However, there were exceptions within Southeast Asia. The Philippines, Vietnam, Dem. Kampuchea and Laos had unsatisfactory growth rates and, consequently, unsustained nutritional gains from the 1970s through the 1980s. Economic factors exerted a big impact on the Philippine nutrition situation, particularly on the dietary status of the households and the nutritional status of children. As a result of the economic dislocation occurring in the country, the nutritional gains of 1978-82 were not maintained in succeeding years. Unlike the case of Thailand, it has been estimated that the solution to nutritional problems in the Philippines is far from being achieved in the immediate future (Villavieja et al. 1989). On the other hand, the nutrition improvements in Thailand have been as remarkable as the economic growth over the last decade. Long-term investments in health, nutrition and other social services in Thailand (as well as in Indonesia) have paid off according to the assessment by the United Nations (1990). It appears, therefore, that the nutrition situation in developing countries is highly dependent on the economic situation, globally and nationally (Cornia et al. 1987), as well as on investment in social services. Adjustment policies should, therefore, consider their implications on distribution and poverty in order that they could positively contribute to the improvement of the nutrition of the people.

Matched MeSH terms: Nutritional Physiological Phenomena*

Fulltext An inquiry into the state of food, nutrition and health in plantations

Chandrasekharan N, Marimuthu T

Med J Malaysia, 1980 Mar;34(3):226-9.

PMID: 7412663

Food expenses accounted for 66% 54% of the total income in the two plantations. The nutritional value of foods purchased and consumed and the adequacy of nutrient intakes in two plantations was studied. The diets were found to be inadequate in calories, protein, calcium, iron and riboflavin. Carbohydrates provided the bulk of the calories. The significance of the findings are discussed.

Matched MeSH terms: Nutritional Physiological Phenomena*

The search for the cause of beriberi in the Malay Peninsula: the contribution of Dr. W. L. Braddon

Wylie E

J Malays Branch R Asiat Soc, 1988;61(2):93-122.

PMID: 11617395

Matched MeSH terms: Nutritional Physiological Phenomena*

Fulltext A study on the food and nutritional status of the Armed Forces

Chong YH, Tee ES, Ng TKW, Yap SB, Mok SK

Med J Malaysia, 1982 Mar;37(1):46-51.

PMID: 7121346

The nutritional status of 158 soldiers drawn from four army camps in Selangor, Negeri Sembilan and Pahang has been assessed by biochemical procedures, nutritional anthropometry and dietary (chemical) analysis. Biochemical assessment showed that with the exception of thiamin and riboflavin nutriture, the nutritional status of the soldiers appeared generally satisfactory and seemed to have improved slightly over those examined by the Inter-Departmental Committee on Nutrition and National Defence (ICNND), USA, in 1962 by similar methods. The anthropometric assessment indicated that the present day soldiers have the same mean height as those examined in 1962. Although they appeared slightly heavier, obesity did not seem to be a problem. Chemical analysis of their diet showed that there is room for improvement in the dietary supply of vitamin A and some of the water-soluble vitamins, particularly riboflavin, thiamin and vitamin C. There was also a significant discrepancy between the nutritional content of the chemically-analysed cooked meals and those calculated from the ration scales using Food Composition Tables, suggesting a need to review the current system of food supply,
preparation and food sertnce unthin army camps in
Malaysia.

Matched MeSH terms: Nutritional Physiological Phenomena*

Dietary regimes for the preschool child in Singapore

MILLIS J

Med J Malaya, 1959 Mar;13(3):215-21.

PMID: 13666189

Matched MeSH terms: Nutritional Physiological Phenomena*

Child nutrition. A survey in the Parit District of Perak Federation of Malaya

THOMSON FA

Bull Inst Med Res Kuala Lumpur, 1960;10:1-73.

PMID: 13776649

Matched MeSH terms: Child Nutritional Physiological Phenomena*

Infant feeding among Malays

MILLIS J

Med J Malaya, 1958 Dec;13(2):145-52.

PMID: 13632212

Matched MeSH terms: Infant Nutritional Physiological Phenomena*

Some aspects of breast feeding in Singapore

MILLIS J

Med J Malaya, 1955 Dec;10(2):157-61.

PMID: 13308616

Matched MeSH terms: Infant Nutritional Physiological Phenomena*

Antagonistic activities of mosquito larvicidal Bacillus sphaericus (Neide) against some pathogenic bacteria

Seleena P, Lee HL

Indian J Med Res, 1993 Mar;97:83-4.

PMID: 8505080

Mosquitocidal strains of B. sphaericus serotype H-5a5b were shown for the first time to exhibit antagonistic activities against several human pathogens especially Salmonella. These strains of B. sphaericus also exhibited high larval toxicity against several mosquitoes.

Matched MeSH terms: Bacterial Physiological Phenomena*

Fulltext Establishing links between assessments and expected learning outcomes through curriculum mapping in a dental physiology curriculum

Vashe A, Devi V, Rao KR, Abraham RR

Natl Med J India, 2021 8 17;34(1):40-45.

PMID: 34397005 DOI: 10.4103/0970-258X.323445

Background: . The relevance of curriculum mapping to determine the links between expected learning outcomes and assessment is well stated in the literature. Nevertheless, studies confirming the usage of such maps are minimal.

Methods: . We assessed links through curriculum mapping, between assessments and expected learning outcomes of dental physiology curriculum of three batches of students (2012-14) at Melaka-Manipal Medical College (MMMC), Manipal. The questions asked under each assessment method were mapped to the respective expected learning outcomes, and students' scores in different assessments in physiology were gathered. Students' (n = 220) and teachers' (n=15) perspectives were collected through focus group discussion sessions and questionnaire surveys.

Results: . More than 75% of students were successful (≥50% scores) in majority of the assessments. There was moderate (r=0.4-0.6) to strong positive correlation (r=0.7-0.9) between majority of the assessments. However, students' scores in viva voce had a weak positive correlation with the practical examination score (r=0.230). The score in the assessments of problem-based learning had either weak (r=0.1-0.3) or no correlation with other assessment scores.

Conclusions: . Through curriculum mapping, we were able to establish links between assessments and expected learning outcomes. We observed that, in the assessment system followed at MMMC, all expected learning outcomes were not given equal weightage in the examinations. Moreover, there was no direct assessment of self-directed learning skills. Our study also showed that assessment has supported students in achieving the expected learning outcomes as evidenced by the qualitative and quantitative data.

Matched MeSH terms: Dental Physiological Phenomena*

Fulltext Quorum quenching revisited--from signal decays to signalling confusion

Hong KW, Koh CL, Sam CK, Yin WF, Chan KG

Sensors (Basel), 2012;12(4):4661-96.

PMID: 22666051 DOI: 10.3390/s120404661

In a polymicrobial community, while some bacteria are communicating with neighboring cells (quorum sensing), others are interrupting the communication (quorum quenching), thus creating a constant arms race between intercellular communication. In the past decade, numerous quorum quenching enzymes have been found and initially thought to inactivate the signalling molecules. Though this is widely accepted, the actual roles of these quorum quenching enzymes are now being uncovered. Recent evidence extends the role of quorum quenching to detoxification or metabolism of signalling molecules as food and energy source; this includes "signalling confusion", a term coined in this paper to refer to the phenomenon of non-destructive modification of signalling molecules. While quorum quenching has been explored as a novel anti-infective therapy targeting, quorum sensing evidence begins to show the development of resistance against quorum quenching.

Matched MeSH terms: Bacterial Physiological Phenomena

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