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  Subjects -> SCIENCES: COMPREHENSIVE WORKS (Total: 374 journals)
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Malawi Journal of Science and Technology
Number of Followers: 6  

  This is an Open Access Journal Open Access journal
ISSN (Print) 1019-7079
Published by African Journals Online Homepage  [261 journals]
  • Spatial and temporal dynamics of water quality in aquatic ecosystems. A
           review of physical, chemical and biological gnomes of some Rivers in
           Malawi

    • Authors: Grace Mweta, Wisdom Changadeya
      Pages: 1 - 18
      Abstract: River ecosystems are among the most vulnerable aquatic systems in the face of increased, urbanization, land degradation, agricultural   activities, and careless disposal of sewage and waste water. This paper presents a review on substantial parameters in water quality   assessments for recreational purposes, domestic purposes and drinking. To attest good quality of water, multiple parameters have to be  measured. Physical, chemical and biological gnomes are tested to ascertain the
      PubDate: 2022-08-04
      Issue No: Vol. 14, No. 1 (2022)
       
  • Temperature-Humidity Index (THI) in rabbits’ pens at different building
           orientations and openings: a measure of animal comfortability in Ile-Ife,
           Nigeria

    • Authors: Wasiu Agunbiade Lamidi, James Adewale Osunade
      Pages: 19 - 28
      Abstract: Natural ventilation for rabbits’ comfortability when subjected to different building orientations and side openings when stocked and when  unstocked were studied. It was 3 x 2 x 3 factorial design. There were 3 factors: season at two levels (dry and rainy seasons); building  orientations (Or) [two levels: 45o and 90o to the directions of prevailing wind] and ventilation openings (Op) [four different levels: 20%,  40%, 60% and 80% side openings]. Two phases in the experiment were the monitoring of the outside climate (temperature, relative   humidity) and in-building climate conditions at stocked and unstocked. The measurements were taken two times a day at 10.00 hr and  14.00 hr. There was interaction among the Or, Op and THI inside stocked building (THIin) but the interaction between Or and Op did not  significantly affect THIin at stocking. This interaction accounts for why 900 Or have low THI values. The Or significantly affected (p ≤ 0.05)  temperature, humidity and THI
      PubDate: 2022-08-04
      Issue No: Vol. 14, No. 1 (2022)
       
  • Water quality in the Lisungwi and Kaphamtengo Rivers in Manondo, Central
           Malawi: Assessment of the impact of artisanal small scale gold mining

    • Authors: Frances Chikanda, Tsubasa Otake, Jones Mwatseteza, Tsutomu Sato
      Pages: 29 - 43
      Abstract: Water quality assessment for river systems is important for tracing any changes in quality caused by, among other things, mining  activities. Mining activities can be one of the most impactful sources of water contamination. In Malawi, gold deposits occur in the  basement rocks of the Lisungwi-Manondo region. As a result, a boom in small scale artisanal mining has occurred as residents have  settled in the area. Despite the development of artisanal small scale mining activities, few studies have investigated the water quality of  the main rivers in the region (i.e., the Lisungwi and Kaphamtengo Rivers), upon which local residents are highly dependent for daily use.  This study provides baseline data for water quality in the region. On-site and laboratory measurements were carried out on the river  water samples, to obtain the physio characteristics (e.g. pH, turbidity, electric conductivity) and the major and minor element  concentrations of the river water. The data was compared to the regional geology to establish anthropogenic and/or geological impacts  on the water quality. The river water has a moderate buffering capacity due to its high alkalinity, along with high Ca, Si, Mg, and Cl  concentrations sourced from the gneiss and calcsilicate rocks in the region. Further analysis of the water quality based on the physiochemical parameters, major and trace element concentrations, showed that the
      PubDate: 2022-08-04
      Issue No: Vol. 14, No. 1 (2022)
       
  • Development of a Digital Body Mass Index (BMI) measuring device for
           low-resource settings

    • Authors: Lydia John Jilantikiri, Suleiman Abimbola Yahaya, Taiye Mary Ajibola, Ayomide Samson Oluwajoba, Chima Anthony Obioha
      Pages: 44 - 57
      Abstract: The global burden of nutrition-related diseases majorly: diabetes, obesity, and cardiovascular diseases have been on a geometrical increase. One way of knowing the risk factor of these is by accurately measuring the Body Mass Index (BMI) of an individual. The design  of a digital BMI device, which measures and displays a subject's BMI, was executed. Materials used include an ultrasonic sensor  for height measurement, load cells for weight measurement and an Arduino UNO microprocessor which receives the output from  measuring devices, calculates the BMI and sends it for display on a liquid crystal display (LCD) screen. This device depicts a low-cost  solution for accurate measurement of a subject’s BMI. The results of the tests performed on the data obtained from the anthropometric  measurements of eight subjects using the digital BMI device, a stadiometer and a weighing scale proved the equipment is reliable in BMI  measurement, with 0.32 root mean square error (RMSE) compared to the 1.19 RMSE gotten from the BMI measu
      PubDate: 2022-08-04
      Issue No: Vol. 14, No. 1 (2022)
       
 
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