28 research outputs found
Analysis on Modeling and Simulink of DC Motor and its Driving System Used for Wheeled Mobile Robot
No full textWheeled Mobile Robots (WMRs) are built with their
Wheels- drive machine, Motors. Depend on their desire design of
WMR, Technicians made used of DC Motors for motion control. In
this paper, the author would like to analyze how to choose DC motor
to be balance with their applications of especially for WMR.
Specification of DC Motor that can be used with desire WMR is to
be determined by using MATLAB Simulink model. Therefore, this
paper is mainly focus on software application of MATLAB and
Control Technology. As the driving system of DC motor, a
Peripheral Interface Controller (PIC) based control system is
designed including the assembly software technology and H-bridge
control circuit. This Driving system is used to drive two DC gear
motors which are used to control the motion of WMR. In this
analyzing process, the author mainly focus the drive system on
driving two DC gear motors that will control with Differential Drive
technique to the Wheeled Mobile Robot . For the design analysis of
Motor Driving System, PIC16F84A is used and five inputs of sensors
detected data are tested with five ON/OFF switches. The outputs of
PIC are the commands to drive two DC gear motors, inputs of Hbridge
circuit .In this paper, Control techniques of PIC
microcontroller and H-bridge circuit, Mechanism assignments of
WMR are combined and analyzed by mainly focusing with the
"Modeling and Simulink of DC Motor using MATLAB"
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Assessing the Adoption of Good Agricultural Practices in Muskmelon Production in Chaung Oo Township, Myanmar
No full textGood Agricultural Practices (GAP) in Myanmar has not yet successfully implemented all around the country, but some farmers and large farm owners now start adopting GAP for fruits production. Data were collected from a total of 105 respondents by suing semi structured questionnaires.
This study revealed that muskmelon farmers’ understanding and awareness on GAP was at a good level but the adoption rate on GAP was still weak. The highest adoption rate was found in the group that followed 10 to 13 out of the 16 recommended guidelines, while the moderate adoption rate was observed in the group that followed 6 to 9 guidelines. The least adoption rate was observed in the group that only followed 3 to 5 guidelines. The adoption of recommended GAP guidelines on muskmelon production was observed positively related with education level of the respondents, farm size, market condition, and extension services for GAP. The difficulty of some GAP guidelines and market condition for GAP products influenced farmers’ perception on the adoption of GAP and the change of farmers’ GAP understanding in the study area. This study also highlight that highly adopting group and moderately adopting group got higher price than less adopting group
Design Calculation and Performance Testing of Heating Coil in Induction Surface Hardening Machine
No full textThe induction hardening machines are utilized in
the industries which modify machine parts and tools needed to
achieve high ware resistance. This paper describes the model of
induction heating process design of inverter circuit and the results
of induction surface hardening of heating coil. In the design of
heating coil, the shape and the turn numbers of the coil are very
important design factors because they decide the overall operating
performance of induction heater including resonant frequency, Q
factor, efficiency and power factor. The performance will be tested
by experiments in some cases high frequency induction hardening
machine
Genetic Diversity and Population Structure Analysis of some Myanmar Mango (Mangifera spp. L.) Accessions using Simple Sequence Repeat Markers
No full textAbstract—Mango (Mangifera indica L.) is a favorite fruit in the world especially in the Indo-Pakistan sub-continent. It is a rich source of vitamins, ß-carotene, minerals, and antioxidants. Mango is known as “the king of fruits” for its taste and flavor. It is native to Southern Asia, especially Burma and eastern India. Since Myanmar is one of the origins of mango. A wide genetic diversity may be found in Myanmar accordingly. Some phenotypic characterizations of Myanmar mangoes have been done but the information of genetic assessments is still limited. Therefore, the present study intended to make genetic assessments of some Myanmar mango accessions collected from different
geographical regions using Simple Sequence
Repeat markers (SSR). This study was
carried out at the laboratory of the
Department of Horticulture, Yezin
Agricultural University (YAU). Fully grown
mango leaf samples were used to extract total
genomic DNA. The DNAs were extracted by
modified CTAB method and checked purity
and concentration with nano
spectrophotometer. The sample DNAs were
amplified using five pairs of SSR primers.
One SSR (MSSR80) revealed as
monomorphic marker among tested 94
mango accessions. The data were analysed
using Structure 2.2 and Phylip software
package. The phylogenetic tree was
constructed by MEGA6 software program.
According to population structure analysis,
94 mango accessions could be distinguished
into three populations though four accessions
were assessed as admixtures. Four
accessions; Parr Phyu Thee (Kinda), Pann
Bin Ga Lar (Kalar Gyi), Pyo Ta Ngon
(Kinda) and Yin Kwae (Kinda) stood as
admixtures. No correlation between the
geographical distribution and population
structure of mango was found. One accession,
Sein Ta Lone (Pan Swae) stood as an
outstanding accession in phylogenetic tree
constructed by Phylip program although it
was grouped together with Shwe Myo Sae,
Ma Chit Su and others in population
structure analysis. It was hard to say discrete
population. Almost all accessions of a
population possessed some alleles from other
populations. It implied that cross pollination
nature plays an important role in mango gene
pool. Accordingly, wider genetic diversity
would be expected among mango population
in Myanmar
Does social isolation, social support or loneliness influence health or well-being after a cardiovascular disease event?: A narrative thematic systematic review
No full textIdentification of factors which influence health after a cardiovascular disease (CVD) event will assist with reducing the high health and economic burden of CVD. We undertook a systematic review to investigate the association between social health (lower social isolation, higher social support and lower loneliness) and health and well-being after a CVD event among people living in Australia and New Zealand. Four electronic databases were systematically searched until June 2020. Two reviewers undertook title/abstract screen. One reviewer undertook full-text screen and data extraction. A second author either independently extracted or checked data. Narrative thematic analysis was undertaken. Of the 752 unique records retrieved, 39 papers from 29 studies met our inclusion criteria. Included studies recruited between 10 and 1,455 participants, aged 12–96 years, and the majority were male. Greater social health was consistently associated with better mental health outcomes (lower depressive symptoms, anxiety symptoms and psychological distress). Lower social isolation and higher social support were associated with the extent to which patient needs were being met. Living situation was not associated with mental health outcomes, and being married or living with someone was associated with greater medication adherence. Our systematic review demonstrates that greater social health is associated with better mental health outcomes and met patient needs among cardiac patients. As partner status and living status did not align with social isolation and social support findings in this review, we recommend they not be used as social health proxies when assessing health outcomes among CVD patients. Our review highlights the need for more research focused on women and the importance of gender-disaggregated reporting. Further assessment is required to evaluate whether loneliness is associated with health and well-being outcomes after a CVD event
Social Isolation and Social Support Influence Health Service Utilisation and Survival after a Cardiovascular Disease Event: A Systematic Review
No full textBoth cardiovascular disease (CVD) and social health carry high health and economic burdens. We undertook a systematic review to investigate the association between social isolation, low social support, and loneliness with health service utilisation and survival after a CVD event among people living in Australia and New Zealand. Four electronic databases were systematically searched for the period before June 2020. Two reviewers undertook the title/abstract screen. One reviewer undertook a full-text screen and data extraction. A second author checked data extraction. Of 756 records, 25 papers met our inclusion criteria. Included studies recruited 10–12,821 participants, aged 18–98 years, and the majority were males. Greater social support was consistently associated with better outcomes on four of the five themes (discharge destination, outpatient rehabilitation attendance, rehospitalisation and survival outcomes; no papers assessed the length of inpatient stay). Positive social health was consistently associated with better discharge designation to higher independent living. As partner status and living status did not align with social isolation and social support findings in this review, we recommend they not be used as social health proxies. Our systematic review demonstrates that social health is considered in cardiac care decisions and plays a role in how healthcare is being delivered (i.e., outpatient, rehabilitation, or nursing home). This likely contributes to our finding that lower social support is associated with high-intensity healthcare services, lower outpatient rehabilitation attendance, greater rehospitalisation and poorer survival. Given our evidence, the first step to improve cardiac outcomes is acknowledging that social health is part of the decision-making process. Incorporating a formal assessment of social support into healthcare management plans will likely improve cardiac outcomes and survival. Further research is required to assess if support person/s need to engage in the risk reduction behaviours themselves for outpatient rehabilitation to be effective. Further synthesis of the impact of social isolation and loneliness on health service utilisation and survival after a CVD event is required
The Prevalence, Clinical Characteristics, Predicting Factors and Impact of Long COVID Syndrome Following Third Wave of Epidemic in Myanmar: Prospective Study
No full textBackground: Coronavirus disease 2019 (COVID-19), emerged in China at the end of 2019, became a major threat to health around the world by causing acute COVID-19 infection. After recovery, a significant number of patients experience prolonged symptoms, long COVID syndrome. The prevalence of long COVID syndrome, its symptoms, severity and relation between clinical parameters and long COVID syndrome, and its impact were not studied in Myanmar.
Methods: A prospective study was conducted via telecommunication to patients with positive SARS COV 2 PCR from nasopharyngeal swab during the third wave from end of May to August 2021. Data were collected by using standardized forms and analysis was done. A chi-square test of independence was performed to examine the relation between age groups, gender, body mass index (BMI), vaccination status, comorbidity status, severity of initial symptoms, oxygen requirement status, and symptoms of long covid syndrome.
Results: Though initial recruitment included 18,709 patients with PCR confirmed COVID-19 infection, only 853 patients with recovery were analyzed. Long COVID syndrome was recorded in nearly 40% (333/853) of them; sixty percent of them (520/853) did not experienced symptoms following recovery. The common presenting symptoms in order of frequency were fatigue 58.9% (196/333), insomnia 27.3% (91/333), palpitation 17.1% (57/333), poor concentration 15.6% (52/333), anxiety 8.7% (29/333), myalgia 6.6% (22/333), chest pain 5.1% (17/333), persistent cough 4.2% (14/333), rash 3% (10/333), headache 2.7% (9/333), diarrhea 1.8% (6/333), anosmia 1.5% (5/333), sensory symptoms 0.9% (3/333) and dyspnea 0.9% (3/333). The majority 70% described as mild- not disturbing daily activity or job; however, 3% had severe symptoms- disturbing daily activity or job. Minority of cases 3% (10/333) required oxygen therapy for 2 months. Age, sex and BMI were not related with long COVID syndrome. However, initial multiple symptoms more than 2, co-morbidity, vaccination and initial oxygen requirement had significantly relationship with development of long COVID syndrome.
Conclusions: In this study, the prevalence of long COVID syndrome among survivors was 40%; the common presenting symptoms in order of frequency were fatigue, insomnia, palpitation and poor concentration. Most of the cases had mild symptoms- not disturb job or daily routine activity. Nearly 80% of them admitted that their health status was not back to pre-COVID condition. Not only the patients with COVID-19 infection having initial multiple symptoms, co-morbidity, no vaccination and initial oxygen requirement but also their care givers should be warned about possible long COVID syndrome; and the necessary for follow up. Vaccination may prevent long COVID syndrome; it should be prioritized to those with comorbidity. It highlighted the need for systematic follow-up after hospitalisation with COVID-19 with multi-disciplinary team, rehabilitation and further investigation
Rational deployment of antimalarial drugs in Africa: should first-line combination drugs be reserved for paediatric malaria cases?
No full textArtemisinin-based combination therapy is exerting novel selective pressure upon populations of Plasmodium falciparum across Africa. Levels of resistance to non-artemisinin partner drugs differ among parasite populations, and so the artemisinins are not uniformly protected from developing resistance, already present in South East Asia. Here, we consider strategies for prolonging the period of high level efficacy of combination therapy for two particular endemicities common in Africa. Under high intensity transmission, two alternating first-line combinations, ideally with antagonistic selective effects on the parasite genome, are advocated for paediatric malaria cases. This leaves second-line and other therapies for adult cases, and for intermittent preventive therapy. The drug portfolio would be selected to protect the 'premier' combination regimen from selection for resistance, while maximising impact on severe disease and mortality in children. In endemic areas subject to low, seasonal transmission of Plasmodium falciparum, such a strategy may deliver little benefit, as children represent a minority of cases. Nevertheless, the deployment of other drug-based interventions in low transmission and highly seasonal areas, such as mass drug administration aimed to interrupt malaria transmission, or intermittent preventive therapy, does provide an opportunity to diversify drug pressure. We thus propose an integrated approach to drug deployment, which minimises direct selective pressure on parasite populations from any one drug component. This approach is suitable for qualitatively and quantitatively different burdens of malaria, and should be supported by a programme of routine surveillance for emerging resistanc
Characterization of Fruit Quality Traits and Biochemical Properties in Different Myanmar Mango Cultivars during Ripening Stages
No full textHere, we characterized the changes in fruit quality and biochemical parameters in four Myanmar mango cultivars from ripening stage 1 to 4 at ambient temperature. Total soluble solids, total sugars, and reducing and non-reducing sugar content increased, whereas titratable acidity decreased with increasing storage time in all cultivars. ‘Sein Ta Lone’ showed the highest consumer acceptability, with maximum sensory quality scores owing to its unique characteristics. ‘Hin Thar’ and ‘Ma Chit Su’ also had better quality and sensory attributes than ‘Yin Kwae’. Sugar/acid ratios in all cultivars ranged from 23 to 50, the standard sugar/acid ratios in high-quality mango fruits. The total phenolic content (TPC) and antioxidant activity among cultivars ranged from 8.20 to 14.96 mg gallic acid equivalents and 19.52 to 26.79 mg vitamin C equivalents antioxidant capacity, respectively, per 100 g of fruit extract throughout the storage. ‘Hin Thar’ was the richest in phytochemical compounds. A significant positive correlation was found between total phenolic activity and 2,2-diphenyl-1-picryl-hydrazyl free radical scavenging activity of fruits, showing that TPC exhibited linear relationships with the antioxidant activities of each mango variety during the different stages of ripening
