Displaying publications 1 - 20 of 88 in total

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  1. Municipal solid waste management in Malaysia: practices and challenges
    Manaf LA, Samah MA, Zukki NI
    Waste Manag, 2009 Nov;29(11):2902-6.
    PMID: 19540745 DOI: 10.1016/j.wasman.2008.07.015
    Rapid economic development and population growth, inadequate infrastructure and expertise, and land scarcity make the management of municipal solid waste become one of Malaysia's most critical environmental issues. The study is aimed at evaluating the generation, characteristics, and management of solid waste in Malaysia based on published information. In general, the per capita generation rate is about 0.5-0.8 kg/person/day in which domestic waste is the primary source. Currently, solid waste is managed by the Ministry of Housing and Local Government, with the participation of the private sector. A new institutional and legislation framework has been structured with the objectives to establish a holistic, integrated, and cost-effective solid waste management system, with an emphasis on environmental protection and public health. Therefore, the hierarchy of solid waste management has given the highest priority to source reduction through 3R, intermediate treatment and final disposal.
    Matched MeSH terms: Population Growth
  2. Pervasive human-driven decline of life on Earth points to the need for transformative change
    Díaz S, Settele J, Brondízio ES, Ngo HT, Agard J, Arneth A, et al.
    Science, 2019 12 13;366(6471).
    PMID: 31831642 DOI: 10.1126/science.aax3100
    The human impact on life on Earth has increased sharply since the 1970s, driven by the demands of a growing population with rising average per capita income. Nature is currently supplying more materials than ever before, but this has come at the high cost of unprecedented global declines in the extent and integrity of ecosystems, distinctness of local ecological communities, abundance and number of wild species, and the number of local domesticated varieties. Such changes reduce vital benefits that people receive from nature and threaten the quality of life of future generations. Both the benefits of an expanding economy and the costs of reducing nature's benefits are unequally distributed. The fabric of life on which we all depend-nature and its contributions to people-is unravelling rapidly. Despite the severity of the threats and lack of enough progress in tackling them to date, opportunities exist to change future trajectories through transformative action. Such action must begin immediately, however, and address the root economic, social, and technological causes of nature's deterioration.
    Matched MeSH terms: Population Growth
  3. Nonlinear effects of increasing nitrogen deposition on rice growth and heavy metal uptake in a red soil ecosystem of southeastern China
    Wang J, Yi X, Cui J, Chang Y, Yao D, Zhou D, et al.
    Sci Total Environ, 2019 Jun 20;670:1060-1067.
    PMID: 31018421 DOI: 10.1016/j.scitotenv.2019.03.245
    With the population growth, urbanization and industrialization, China has become a hotspot of atmospheric deposition nitrogen (ADN), which is a threat to ecosystem and food safety. However, the impacts of increased ADN on rice growth and grain metal content are little studied. Based on previous long-term ADN studies, greenhouse experiment was conducted with four simulated ADN rates of 0, 30, 60 and 90 kg N ha-1 yr-1 (CK, N1, N2 and N3 as δ15N, respectively) to assess rice growth and metal uptake in a red soil ecosystem of southeast China during 2016-2017. Results showed that simulated ADN could promote rice growth and increase yields by 15.68-24.41% (except N2) and accumulations of cadmium (Cd) or copper (Cu) in organs. However, there was no linear relationship between ADN rate and rice growth or Cd or Cu uptake. The 15N-ADN was mainly accumulated in roots (21.31-67.86%) and grains (25.26-49.35%), while Cd and Cu were primarily accumulated in roots (78.86-93.44% and 90.00-96.24%, respectively). 15N-ADN and Cd accumulations in roots were significantly different between the two growing seasons (p 
    Matched MeSH terms: Population Growth
  4. Fulltext Persistent mosquito fogging can be detrimental to non-target invertebrates in an urban tropical forest
    Lee NSM, Clements GR, Ting ASY, Wong ZH, Yek SH
    PeerJ, 2020;8:e10033.
    PMID: 33062440 DOI: 10.7717/peerj.10033
    Background: Human population growth has led to biodiversity declines in tropical cities. While habitat loss and fragmentation have been the main drivers of urban biodiversity loss, man-made interventions to reduce health risks have also emerged as an unintentional threat. For instance, insecticide fogging to control mosquito populations has become the most common method of preventing the expansion of mosquito-borne diseases such as Dengue. However, the effectiveness of fogging in killing mosquitoes has been called into question. One concern is the unintended effect of insecticide fogging on non-target invertebrates that are crucial for the maintenance of urban ecosystems. Here, we investigate the impacts of fogging on: (1) target invertebrate taxon (Diptera, including mosquitoes); (2) non-target invertebrate taxa; and (3) the foraging behavior of an invertebrate pollinator taxon (Lepidoptera) within an urban tropical forest.

    Methods: We carried out fogging with Pyrethroid insecticide (Detral 2.5 EC) at 10 different sites in a forest situated in the state of Selangor, Peninsular Malaysia. Across the sites, we counted the numbers of knocked-down invertebrates and identified them based on morphology to different taxa. We constructed Bayesian hierarchical Poisson regression models to investigate the effects of fogging on: (1) a target invertebrate taxon (Diptera) 3-h post-fogging; (2) selected non-target invertebrate taxa 3-h post-fogging; and (3) an invertebrate pollinator taxon (Lepidoptera) 24-h post-fogging.

    Results: A total of 1,874 invertebrates from 19 invertebrate orders were knocked down by the fogging treatment across the 10 sites. Furthermore, 72.7% of the invertebrates counted 3-h post-fogging was considered dead. Our regression models showed that given the data and prior information, the probability that fogging had a negative effect on invertebrate taxa 3-h post-fogging was 100%, with reductions to 11% of the pre-fogging count of live individuals for the target invertebrate taxon (Diptera), and between 5% and 58% of the pre-fogging count of live individuals for non-target invertebrate taxa. For the invertebrate pollinator, the probability that fogging had a negative effect 24-h post-fogging was also 100%, with reductions to 53% of the pre-fogging count of live individuals.

    Discussion: Our Bayesian models unequivocally demonstrate that fogging has detrimental effects on one pollinator order and non-target invertebrate orders, especially taxa that have comparatively lower levels of chitinisation. While fogging is effective in killing the target order (Diptera), no mosquitos were found dead in our experiment. In order to maintain urban biodiversity, we recommend that health authorities and the private sector move away from persistent insecticide fogging and to explore alternative measures to control adult mosquito populations.

    Matched MeSH terms: Population Growth
  5. [Family planning programs and birth control in the third world]
    Wohlschlagl H
    Demogr Inf, 1991;?:17-34, 153.
    PMID: 12343122
    PIP: The population explosion has been abating since the 2nd half of the 1960s. The birth rate of the 3rd World dropped from 45/1000 during 1950-55 to 31/1000 during 1985-90. From the 1st half of the 1960s to the 1st half of the 1980s the total fertility of such countries dropped from 6.1 to 4.2 children/woman. In Taiwan, Singapore, Hong Kong, South Korea, and Malaysia living standards improved as a result of industrialization, and fertility decreased significantly. In Sri Lanka, China, North Vietnam, and Thailand the drop of fertility is explained by cultural and religious factors. In 1982 about 78% of the population of developing countries lived in 39 states that followed an official policy aimed at reducing the population. Another 16% lived in countries supporting the concept of a desired family size. However, World Bank data showed that in the mid-1980s in 27 developing countries no state family planning (FP) programs existed. India adopted an official FP program in 1952, Pakistan followed suit in 1960, South Korea in 1961, and China in 1962. In Latin America a split policy manifested itself: in Brazil birth control was rejected, only Colombia had a FP policy. In 1986 the governments of 68 of 131 developing countries representing 3.1 billion people considered the number of children per woman too high. 31 of these countries followed concrete population control policies. On the other hand, in 1986 24 countries of Africa with 40% of the continent's population took no measures to influence population growth. In Latin America and the Caribbean 18 of 33 countries were idle, except for Mexico that had a massive state FP program. These programs also improve maternal and child health with birth spacing of at least 2 years, and the prevention of pregnancies of too young women or those over 40. The evaluation of rapidly spreading FP programs in the 1970s was carried out by the World Fertility Survey in 41 countries. The impact of FP programs was more substantial than socioeconomic factors. Contraceptive use increased in Mexico from 13% in 1973 to 41% in 1978 among women of fertile age. According to 1984 and 1988 UN data modern methods of contraception were used by 70% of women in China, 60-65% in Southeast Asia, Costa Rica, and Puerto Rico. In contrast, less than 5% used them in most countries of Africa, 15-20% in West Asia, 25-30% in South Asia, and 40% in Latin America. The pill was the most popular method. From the early 1980s in South and East Asia 1/5 of women got sterilized after attaining the desired family size. Less than 10% of women used IUDs in developing countries. FP programs have benefited from higher education levels and economic incentives and sanctions and exemplified in Singapore, China, South Korea, Thailand, and Taiwan.
    Matched MeSH terms: Population Growth*
  6. Malaria and population explosion
    Williams CD
    Lancet, 1968 Oct 19;2(7573):868-9.
    PMID: 4175755
    Matched MeSH terms: Population Growth*
  7. Fulltext PRODUCTION OF BIODIESEL FROM WASTE COOKING OIL USING BENTONITE CATALYSTS
    Noraini Hamzah, Izyan Yusof, Sabiha Hanim Saleh, Nazrizawati Ahmad Tajuddin, Mohd Lokman Ibrahim, Wan Zurina Samad
    Journal of Academia Universiti Teknologi MARA Negeri Sembilan, 2021;9(1):139-144.
    MyJurnal
    Demand for diesel continues to increase due to rapid population growth, which could contribute to fossil fuel exhaustion. Biodiesel has been widely developed as a replacement for conventional diesel to resolve the issue. Biodiesel production from waste cooking oil (WCO) was carried out via the transesterification process using two types of bentonite catalysts, which are raw bentonite and NaOH/bentonite. By using the impregnation method, the NaOH/bentonite catalyst was synthesized at 60°C for 12 hours. The transesterification was conducted with 0.5wt% of catalyst, at 15:1 (methanol- to-oil), for 2 hours at different reaction temperatures. The characterization of both raw bentonite and NaOH/bentonite was done using X-ray Diffraction (XRD) and Brunauer, Emmett, Teller (BET) surface characterization. A high yield of FAMEs (72%) was found to be obtained in continuous stirring at 55ºC for 2 hours and 15:1 methanol/oil molar ratio with 0.5wt.% (0.15g) of NaOH/bentonite catalyst.
    Matched MeSH terms: Population Growth
  8. Presidential address
    Vohra U
    IIPS Newsl, 1993 Jul;34(3):4-6.
    PMID: 12287408
    Matched MeSH terms: Population Growth*
  9. Summary of regional response to the fourth inquiry
    United Nations. Economic and Social Commission for Asia and the Pacific ESCAP. Population and Social Affairs Division
    Asian Pac Popul Programme News, 1979;8(3):8-12.
    PMID: 12278305
    Matched MeSH terms: Population Growth*
  10. The influence of infant and child mortality on fertility in selected countries of the Asian and Pacific region
    United Nations. Economic and Social Commission for Asia and the Pacific ESCAP. Population Division. Fertility and Family Planning Section
    Popul Res Leads, 1985.
    PMID: 12314064
    Matched MeSH terms: Population Growth*
  11. Population change and some aspects of socio-economic development
    UNESCO. Regional Office for Education in Asia and the Pacific
    Bull Unesco Reg Off Educ Asia Pac, 1982 Jun.
    PMID: 12265663
    Matched MeSH terms: Population Growth*
  12. [On the mobile character of the Malay village population: a feature of the post-settlement population of Galok, Kelantan]
    Tsubouchi Y
    Tonan Ajia Kenkyu, 1987 Dec;25(3):164-75.
    PMID: 12157843
    The author examines migration trends in Malay villages. "This report deals with the case of Galok, a settlement opened in the last decade of nineteenth century about 40 kilometers up the Kelantan River, based on field data collected in 1970/71 and 1984." The low rate of population growth due to migration is analyzed, with a focus on the impact of rural-urban migration and changes in household composition. (SUMMARY IN ENG)
    Matched MeSH terms: Population Growth*
  13. [Prognostic evaluations of the medical and demographic processes]
    Tishuk EA
    Probl Sotsialnoi Gig Zdravookhranenniiai Istor Med, 2003 Sep-Oct.
    PMID: 14661406
    The medical-and-demographic processes as a starting point for the planning of means and resources for the short- and average-term future are forecasted in the paper on the basis of long-term peculiarities of the natural-science data and with respect for the social-and-economic crisis now underway in the country.
    Matched MeSH terms: Population Growth*
  14. The determinants of fertility: a theoretical forecasting model
    Fish M, Thompson AA
    Behav Sci, 1970 Jul;15(4):318-28.
    PMID: 5424500
    Matched MeSH terms: Population Growth*
  15. An overview of the population dynamics in Malaysia
    Arshat H, Tey Nai Peng
    Malays J Reprod Health, 1988 Jun;6(1):23-46.
    PMID: 12281592
    Matched MeSH terms: Population Growth*
  16. Recent and prospective population trends in Malaysia
    Jones GW, Tan PC
    J Southeast Asian Stud, 1985 Sep;16(2):262-80.
    PMID: 12267554
    Matched MeSH terms: Population Growth*
  17. A macroscopic approach to demography
    Smith JD
    J Math Biol, 2004 Jan;48(1):105-18.
    PMID: 14685774
    A canonical/lognormal model for human demography is established, specifying the net maternity function and the age distribution for mothers of new-borns using a single macroscopic parameter vector of dimension five. The age distribution of mothers is canonical, while the net maternity function normalizes to a lognormal density. Comparison of an actual population with the model serves to identify anomalies in the population which may be indicative of phase transitions or influences from levels outside the demographic. Tracking the time development of the parameter vector may be used to predict the future state of a population, or to interpolate for data missing from the record. In accordance with classical theoretical considerations of Backman, Prigogine, et al., it emerges that the logarithm of a mother's age is the most fundamental time variable for demographic purposes.
    Matched MeSH terms: Population Growth
  18. Fulltext Land use change using geospatial techniques in upper prek thnot watershed in Cambodia
    Norin Khorn, Mohd Hasmadi Ismail, Norizah Kamarudin, Siti Nurhidayu
    Pertanika Journal of Science & Technology, 2020;28(3):879-892.
    MyJurnal
    Monitoring of land use change is crucial for sustainable resource management and development planning. Up-to-date land use change information is important to understand its pattern and identify the drivers. Remote sensing and geographic information system (GIS) have proven as a useful tool to measure and analyze land use changes. Recent advances in remote sensing technology with digital image processing provide unprecedented possibilities for detecting changes in land use over large areas, with less costs and processing time. Thus, the objective of this study was to assess the land use changes in upper Prek Thnot watershed in Cambodia from 2006 until 2018. Geospatial tools such as remote sensing and GIS were used to process and produce land use maps from Landsat 5 TM, Landsat 7 ETM+ and Landsat 8. The post-classification comparison was conducted for analysing the land use changes. Results show forest area was greatly decreased by 1,162.06 km2 (33.67%) which was converted to rubber plantation (10.55 km2 ), wood shrub (37.65 km2 ), agricultural land (1,099.71 km2 ), built-up area (17.76 km2 ), barren land (3.65 km2 ), and water body (14.69 km2 ). Agricultural land increased by 1,258.99 km2 (36.48%), while wood shrub declined by 161.88 km2 (4.69%). Rubber plantation, built-up area, barren land, and water bodies were increased by 10.55 km2 (0.31%), 33.64 km2 (0.97%), 4.87 km2 (0.14%) and 15.89 km2 (0.46%), respectively. The decrease of forest and wood shrub had resulted due to population growth (1.8% from 2008 to 2019) and land conversion for agricultural purposes. Hence, this study may provide vital information for wise sustainable watershed’s land management, especially for further study on the effect of land use change on runoff in this area.
    Matched MeSH terms: Population Growth
  19. Fulltext Forecasting electricity demand from daily log sheet with correlated variables
    Mohamad Syamim Hilm, Sofianita Mutalib, Sarifah Radiah Shari, Siti Nur Kamaliah Kamarudin
    ESTEEM Academic Journal, 2020;16(2):31-40.
    MyJurnal
    Electricity is one of the most important resources and fundamental infrastructure for every nation. Its milestone shows a significant contribution to world development that brought forth new technological breakthroughs throughout the centuries. Electricity demand constantly fluctuates, which affects the supply. Suppliers need to generate more electrical energy when demand is high, and less when demand is low. It is a common practice in power markets to have a reserve margin for unexpected fluctuation of demand. This research paper investigates regression techniques: multiple linear regression (MLR) and vector autoregression (VAR) to forecast demand with predictors of economic growth, population growth, and climate change as well as the demand itself. Auto-Regressive Integrated Moving Average (Auto-ARIMA) was used in benchmarking the forecasting. The results from MLR and VAR (lag-values=20) and Auto-ARIMA are monitored for five months from June to October of 2019. Using the root mean square error (RMSE) as an indicator for accuracy, Auto-ARIMA has the lowest RMSE for four months except in June 2019. VAR (lag-values=20) shows good forecasting capabilities for all five months, considering it uses the same lag values (20) for each month. Three different techniques have been successfully examined in order to find the best model for the prediction of the demand.
    Matched MeSH terms: Population Growth
  20. Current status and future perspectives of solid waste management in Iran: a critical overview of Iranian metropolitan cities
    Rupani PF, Delarestaghi RM, Abbaspour M, Rupani MM, El-Mesery HS, Shao W
    Environ Sci Pollut Res Int, 2019 Nov;26(32):32777-32789.
    PMID: 31520387 DOI: 10.1007/s11356-019-06456-5
    By growing urban population, Iran faces numerous environmental issues and solid waste management is on the top of these problems. Studies showed that a daily average of 700-1000 g of wastes are produced per person in Iran, in which organic waste accounts for a significant amount. On the other hand, hospital waste represents a part of the wastes, which need careful consideration from the environmental point of view. In the present study, the amount, composition, and management of urban and hospital wastes were evaluated in 7 Iranian metropolises, which account for about 30% of the population and produce about 35% of the country wastes. Based on prior surveys, landfill method is the current main method for waste management in these cities, which is generally not completely sanitary and therefore causes many environmental problems. The other common methods for waste management in these cities are composting of organic wastes, and the use of waste conversion methods to energy. However, the latter is ongoing only in Tehran which also includes some limitations. Therefore, the study also evaluated the future perspectives and feasibility of waste-to-energy conversion as a promising economic route for waste disposal.
    Matched MeSH terms: Population Growth
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