Journal articles on the topic 'Low-rise homes'
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Lai, Yonghang, Ian A. Ridley, and Peter Brimblecombe. "Air Change in Low and High-Rise Apartments." Urban Science 4, no. 2 (May 13, 2020): 25. http://dx.doi.org/10.3390/urbansci4020025.
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Air exchange in tall apartment buildings is critical in controlling indoor environments in urban settings. Airtightness is relevant to energy efficiency, thermal comfort and air quality experienced by urban dwellers who spend much of their time indoors. While many air change measurements have been made in residential homes, fewer are available for high-rise apartments. The blower-door and CO2 exchange methods were used to measure air change in some Hong Kong apartment buildings, for comparison with those from other parts of the world. Hong Kong apartments are often small and typical rented apartments show a median of seven air changes per hour under a 50 Pa pressure difference, similar to Mediterranean houses, though much greater than the airtight buildings of Northern Europe. Extrapolation of blower-door measurements made at 50 Pa to the natural pressure difference measured for individual Hong Kong apartments provides an approximation (within 8%) of the natural air change rate measured with a tracer. Air flow is a function of the pressure difference ∆Pnf and the exponent n was found close to the typical 0.6. There was a positive relationship between air permeability and construction age, but some of this also seems to reflect varying levels of maintenance by the building management companies. The median exchange in the apartments under naturally ventilated conditions was 0.26 h−1, not atypical of some houses on the US West Coast.
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KUSHNIN, ANDREY V., and ROMAN I. SHENKMAN. "CURRENT TRENDS IN LOW-RISEENERGY-EFFICIENT CONSTRUCTION." Architecture, Construction, Transport, no. 2(100) (2022): 58–65. http://dx.doi.org/10.31660/2782-232x-2022-2-58-65.
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The article deals with the advantages of energy-efficient construction of low-rise buildings. Such buildings with the use of energy- saving materials and technologies, characterized by low waste and non-aggressive attitude to the environment, are oriented towards comfortable, reliable, safe living, and the harmony between man and dwelling and the environment. The attention on the necessity to form environmental thinking in order to implement the concept of environmental friendliness low-rise buildings and, as a consequence, to meet the growing needs of people to live in an individual eco-house is emphasized. Outlines current trends in the construction of energy-efficient homes in Russia.
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Reed, Susan C., and Nancy Davis. "Jane Dent Home: The Rise and Fall of Homes for the Aged in Low-Income Communities." Journal of Health Care for the Poor and Underserved 15, no. 4 (2004): 547–61. http://dx.doi.org/10.1353/hpu.2004.0070.
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Lloyd, Philip. "The energy profile of a low-income urban community." Journal of Energy in Southern Africa 25, no. 3 (September 23, 2014): 80–85. http://dx.doi.org/10.17159/2413-3051/2014/v25i3a2661.
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As part of a household energisation experiment, a baseline survey was undertaken from a sample of 152 households in the informal settlement of Samora Machel. The survey covered energy needs for cooking, space heating, water heating, lighting and any other demands, the costs of energy and total household monthly expenses. The average home had 3-4 inhabitants in less than 2 rooms. Paraffin was the primary source of energy for cooking and space heating, and played a significant role in water heating and lighting. Electricity was quite widely available, but was used primarily for low-power services such as radios and cellphones. Only 10% of all homes had a refrigerator. 20% of all homes purchased LP gas regularly but only used it on social occasions. Fuelwood was collected rather than purchased, and mainly burned in an open brazier, both for cooking and space heating. Space heating was primarily by cookstove; only one home had a specially designed heater using paraffin fuel. The median household expenditure was R1 800/month and 20% of this was spent on energy services. About half the homes are at risk of energy poverty, where lack of energy could give rise to a range of health problems, particularly during the colder months.
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Hanninen, O. "The Sauna - Stimulating and Relaxing." Physiology 1, no. 6 (December 1, 1986): 179–81. http://dx.doi.org/10.1152/physiologyonline.1986.1.6.179.
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The sauna - a hot air bath - is a centuries old cultural tradition in Finland and is now spreading to fitness centers and private homes around the world. The exposure to hot air at 70-100� C and low humidity for 10-20 minutes causes skin temperature to rise, resulting in heavy sweating and other physiological changes. A major reason for the sauna's continuing popularity is that it leaves the bather with a pleasant feeling of deep relaxation.
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Choi, Han Joo, Hyung Jun Moon, Won Jung Jeong, Gi Woon Kim, Jae Hyug Woo, Kyoung Mi Lee, Hyuk Joong Choi, Yong Jin Park, and Choung Ah Lee. "Effect of the Floor Level on the Probability of a Neurologically Favorable Discharge after Cardiac Arrest according to the Event Location." Emergency Medicine International 2019 (October 16, 2019): 1–6. http://dx.doi.org/10.1155/2019/9761072.
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As the number of people living in high-rise buildings increases, so does the incidence of cardiac arrest in these locations. Changes in cardiac arrest location affect the recognition of patients and emergency medical service (EMS) activation and response. This study aimed to compare the EMS response times and probability of a neurologically favorable discharge among patients who suffered an out-of-hospital cardiac arrest (OHCA) event while on a high or low floor at home or in a public place. This retrospective analysis was based on Smart Advanced Life Support registry data from January 2016 to December 2017. We included patients older than 18 years who suffered an OHCA due to medical causes. A high floor was defined as ≥3rd floor above ground. We compared the probability of a neurologically favorable discharge according to floor level and location (home vs. public place) of the OHCA event. Of the 6,335 included OHCA cases, 4,154 (65.6%) events occurred in homes. Rapid call-to-scene times were reported for high-floor events in both homes and public places. A longer call-to-patient time was observed for home events. The probability of a neurologically favorable discharge after a high-floor OHCA was significantly lower than that after a low-floor OHCA if the event occurred in a public place (adjusted odds ratio (aOR), 0.58; 95% confidence intervals (CI), 0.37–0.89) but was higher if the event occurred at home (aOR, 1.40; 95% CI, 0.96–2.03). Both the EMS response times to OHCA events in high-rise buildings and the probability of a neurologically favorable discharge differed between homes and public places. The results suggest that the prognosis of an OHCA patient is more likely to be affected by the building structure and use rather than the floor height.
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Huang, Sean Shenghsiu, and John R. Bowblis. "Is the Quality of Nursing Homes Countercyclical? Evidence From 2001 Through 2015." Gerontologist 59, no. 6 (December 7, 2018): 1044–54. http://dx.doi.org/10.1093/geront/gny148.
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Abstract Background and Objectives To examine whether nursing homes (NHs) provide better quality when unemployment rates rise (countercyclical) and explore mechanisms contributing to the relationship between quality and unemployment rates. Research Design and Methods The study uses the data on privately owned, freestanding NHs in the continental United States that span a period from 2001 through 2015. The empirical analysis relies on panel fixed-effect regressions with the key independent variable being the county-level unemployment rate. NH quality is measured using deficiencies, outcomes, and care process measures. We also examine nursing staff levels, as well as employee turnover and retention. Results NHs have better quality when unemployment rates increase. Higher unemployment rates are associated with fewer deficiencies and lower deficiency scores. This countercyclical relationship is also found among other quality measures. In terms of mechanisms, we find higher nursing staff levels, lower employee turnover, and better workforce retention when unemployment rates rise. Improvement in staffing is likely contributing to better quality during recessions. Interestingly, these effects predominately occur in for-profit NHs for deficiencies and staffing levels. Discussions and Implications NH quality is countercyclical. With near record-low unemployment rates in 2018, regulatory agencies should pay close attention to NH quality when and where the local economy registers strong growth. On the other hand, the finding of the unemployment rate–staffing/turnover relationship also suggests that policies increasing staffing and reducing employee turnover may not only improve NH quality but also have the potential to smooth quality fluctuations between business cycles.
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Setiawan, Adelita, Lucia Yovita Hendrati, and Yudied Agung Mirasa. "THE MAPPING AND ANALYSIS OF DIPHTHERIA CASES IN SURABAYA (2017-2018)." Jurnal Biometrika dan Kependudukan 10, no. 1 (June 25, 2021): 45. http://dx.doi.org/10.20473/jbk.v10i1.2021.45-52.
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Diphtheria is an acute disease that attacks the airways and causes deaths. The risk factors for diphtheria are low Diphtheria-Pertussis-Tetanus (DPT) immunization coverage and an unhealthy home environment. One effort to control diphtheria is by providing information in the form of the patient's location that makes it easier to determine the target group of people intervened. The city of Surabaya experienced an increase of 50 diphtheria cases from 2017 to 2018. This study aimed to map and analyze diphtheria cases based on DPT immunization and healthy homes from 2017 to 2018 in the city of Surabaya. This study was classified descriptive analytic and used an ecological design. This study used the Pearson's correlation coefficient statistical test to analyze secondary data from the Surabaya City’s Health Profile of 2017 to 2018. This study employed the Health Mapper 4.3.0.0 application and SPSS software version 23. The study variables were diphtheria cases, DPT immunization coverage, and the percentage of healthy homes in 2017 and 2018 in Surabaya. The results of the statistical test indicated that there was a moderate relationship between DPT basic immunization coupon with the number of diphtheria cases in 2018 (p = 0.007; OR = 0.471); while the percentage of healthy homes and the number of diphtheria cases in 2018 showed a strong correlation (p = 0.002; OR = 0.544). The city experienced an increase in the number of diphtheria cases from 2017 to 2018, as well as the rise in DPT immunization coverage and the percentage of healthy homes, which tended to be stagnant. DPT immunization coverage and the percentage of healthy homes based on the 2018 data were related to the number of diphtheria cases in Surabaya. Counseling for the people in the city should be conducted to ensure that their children get DPT immunization and maintain environment cleanliness for a healthy home.
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Je, Hyun Jung, Kyu Hong Hwang, and Hyuk Sam Kwon. "Distribution of Old Low-rise Homes and Types of Home Repair Operators: In Relation to the Home Repair Public Support Activation Project." Journal of the Korean Urban Geographical Society 22, no. 3 (December 31, 2019): 131–47. http://dx.doi.org/10.21189/jkugs.22.3.9.
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Zhou, Yang, Kwok-wai Mui, and Ling-tim Wong. "Evaluation of Design Flow Rate of Water Supply Systems with Low Flow Showering Appliances." Water 11, no. 1 (January 9, 2019): 100. http://dx.doi.org/10.3390/w11010100.
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The installation of water efficient appliances is an efficient demand-side water management measure favored by policymakers and water providers nowadays. The adoption of low flow showerheads in large and complex plumbing systems will not only contribute to a great reduction of shower water use in the whole water system, but also further influence the water supply system design. Hence, it is necessary to justify the redesign of existing water supply systems (such as the pipe size, storage tank volume, pumping arrangement etc.) in terms of the use of low flow showerheads. This study uses Monte Carlo simulations to evaluate the design flow rate for a typical high-rise roof tank water supply system in Hong Kong with the installation of low flow showerheads. The simulation results indicate that a full installation of low flow showerheads can decrease the design flow rate by 15%, corresponding to an energy efficiency improvement of 1.5%. The potential for water savings and associated energy savings can be significantly higher when all installed appliances in homes are water efficient (e.g., showerheads, water taps, washing machines). Further work is required to evaluate the redesign of existing water supply systems for a sustainable future.
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Vázquez-Barquero, J. L., J. F. Díez-Manrique, C. Peña, J. Aldama, C. Samaniego Rodríguez, J. Menéndez Arango, and C. Mirapeix. "A community mental health survey in Cantabria: a general description of morbidity." Psychological Medicine 17, no. 1 (February 1987): 227–41. http://dx.doi.org/10.1017/s0033291700013118.
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SynopsisA two-stage mental illness survey of a random sample of persons aged 17 years and over from a rural community in Cantabria, Spain, is described. In the first stage newly qualified doctors and final year medical students interviewed 1223 respondents (583 males and 640 females) at their homes, using the General Health Questionnaire (GHQ-60) and other psychopathological and social questionnaires. In the second stage senior psychiatrists carried out an at-home interview on a sample composed of all those who in the first stage scored above the cut-off point on the GHQ, and of a similar number of persons selected at random from two independent batches of below-threshold scorers on the GHQ. Because of this design the prevalence figures have to be weighted in order to represent the whole first stage sample.Of the total population, 14·7% (8·1% of the men and 20·6% of the women) had psychiatric disorders as defined by the PSE-ID system. In males depression accounted for about twice as many cases as anxiety states, but in females there was a predominance of a combination of anxiety, phobic and obsessive conditions. Men presented a higher prevalence of disorders over the age of 35, with a peak around the age of forty, while in women the rise of prevalence was over the age of 45. There was, however, no significant association with marital status.Unemployment was related to mental illness in males but not in females, while the reverse was true of the type of work. In both sexes the presence of children under fourteen in the household was not related to a rise in prevalence. Women exhibited a high rate of mental illness in the low educational level and in the low social and religious integration groups, but in men a rise in prevalence was found in the low social status, low educational level and low social integration groups. Lastly, in both sexes the presence of physical illness was related to mental disorders.
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Thomas, J. V., A. Arunachalam, R. K. Jaiswal, P. G. Diwakar, and B. Kiran. "Dynamic Land Use and Coastline Changes in active Estuarine Regions – A Study of Sundarban Delta." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-8 (November 27, 2014): 133–39. http://dx.doi.org/10.5194/isprsarchives-xl-8-133-2014.
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Alteration of natural environment in the wake of global warming is one of the most serious issues, which is being discussed across the world. Over the last 100 years, global sea level rose by 1.0–2.5 mm/y. Present estimates of future sea-level rise induced by climate change range from 28 to 98 cm for the year 2100. It has been estimated that a 1-m rise in sea-level could displace nearly 7 million people from their homes in India. The climate change and associated sea level rise is proclaimed to be a serious threat especially to the low lying coastal areas. Thus, study of long term effects on an estuarine region not only gives opportunity for identifying the vulnerable areas but also gives a clue to the periods where the sea level rise was significant and verifies climate change impact on sea level rise. Multi-temporal remote sensing data and GIS tools are often used to study the pattern of erosion/ accretion in an area and to predict the future coast lines. The present study has been carried out in the Indian Sundarbans area. Major land cover/ land use classes has been delineated and change analysis of the land cover/ land use feature was performed using multi-temporal satellite images (Landsat MSS, TM, ETM+) from 1973 to 2010. Multivariate GIS based analysis was carried out to depict vulnerability and its trend, spatially. Digital Shoreline change analysis also was attempted for two islands, namely, Ghoramara and Sagar Islands using the past 40 years of satellite data and validated with 2012 Resourcesat-2 LISS III data.
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Aprianto, Rizal. "Proses Kebertahanan Kampung Petempen Dalam Perkembangan Kota." JURNAL PEMBANGUNAN WILAYAH & KOTA 12, no. 3 (December 29, 2016): 347. http://dx.doi.org/10.14710/pwk.v12i3.12909.
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Gajahmada become one area with great potential value in the property. Kampong Petempen located in the surrounding area are also not spared Gajahmada affected the development of property in the area. Now some homes in Kampong Petempen has been sold and have been change the high rise buildings. However, there are still some Petempen residents which still survive. The purpose of this research is to see how the adaptation done Petempen residents in order to maintain their homes of calls for the development of trade and services around it. This research was conducted with used a qualitative approach through descriptive analysis qualitative technique. Result the research can be concluded that, Kampong Petempen will gradually disappeared, The resilience process by residents just survived by means of waiting for a price deal and seeks exchange around, meanwhile the percentage of people who do not want to move by reason of comfortable live in Petempen are incredibly small. This virtue of, First, most areas of Kampong Petempen were in owned by landlords, bargaining position between residents who still stay with the developers is very low. Second, happened symbiotic mutualism between residents who status his house not certified and is the home heirs with the developers. Third, the Petempen residents who survives adapt by means of emerged as the created new economic system by opening businesses, as food stalls and boarding house.
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Kasmalkar, Indraneel G., Katherine A. Serafin, Yufei Miao, I. Avery Bick, Leonard Ortolano, Derek Ouyang, and Jenny Suckale. "When floods hit the road: Resilience to flood-related traffic disruption in the San Francisco Bay Area and beyond." Science Advances 6, no. 32 (August 2020): eaba2423. http://dx.doi.org/10.1126/sciadv.aba2423.
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As sea level rises, urban traffic networks in low-lying coastal areas face increasing risks of flood disruptions. Closure of flooded roads causes employee absences and delays, creating cascading impacts to communities. We integrate a traffic model with flood maps that represent potential combinations of storm surges, tides, seasonal cycles, interannual anomalies driven by large-scale climate variability such as the El Niño Southern Oscillation, and sea level rise. When identifying inundated roads, we propose corrections for potential biases arising from model integration. Our results for the San Francisco Bay Area show that employee absences are limited to the homes and workplaces within the areas of inundation, while delays propagate far inland. Communities with limited availability of alternate roads experience long delays irrespective of their proximity to the areas of inundation. We show that metric reach, a measure of road network density, is a better proxy for delays than flood exposure.
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Gibson, Tom. "Grid Trouble in Paradise." Mechanical Engineering 137, no. 12 (December 1, 2015): 42–47. http://dx.doi.org/10.1115/1.2015-dec-3.
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This article discusses why Hawaii needs to find new ways to handle the influx of solar power. In Hawaii, rooftop solar panels are popping up everywhere. However, the solar boom has also created some complications, including sudden changes or disruptions in the system or problems at the distribution side, when there are lots of PV connected at the rooftops. Electrical loads in homes fluctuate all the time as power-hungry appliances like air conditioners and water heaters turn on and off, resulting in a high probability of low load and too much power. Power can go back through the nearby substation transformer and cause a rise in the voltage. That the state is split into several small islands further complicates matters. Another challenge unique to Hawaii is that each island in Hawaii is its own independent grid, and there are no neighbors to depend on for power.
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Wagner, Karl. "Reducing CO2 in Passivhaus-Adapted Affordable Tropical Homes." Encyclopedia 3, no. 1 (January 26, 2023): 168–81. http://dx.doi.org/10.3390/encyclopedia3010012.
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On average, houses including those in the tropics are responsible for almost 39% of the global carbon emission caused by non-renewables, first and foremost by fuel. Looking at the worldwide map of residential buildings’ contribution compared with commercial, the worldwide national maximum of 33.5% CO2 of housing is caused by residential buildings in Uzbekistan. In an overwhelming number of most countries, their values are significantly lower, due to comparably lower energy demand than commercial buildings and because affordable homes increasingly use small PV to cater for their own basic needs. However, with the rising temperature and a likewise growing imperative to cool homes from about 30 °C onwards basically by split-unit air conditioners, the residential houses’ portion of CO2-emission might dramatically increase to survive such more common hot periods in the future. In combination with air conditioners needing some airtightness, the first purpose of this entry is to show that by 2050 in tropical regions, there will be no alternative to relatively airtight houses if the temperatures rise at the present speed. This is one alternative to an uncontrollable and life-threatening migration of millions of people to cooler but still livable regions in 2050. To trigger necessary changes toward homes that can better avert the heat, using the method of qualitative comparative content analysis, passive houses (PH) have emerged as adaptations to the tropical climate. Therefore, the second purpose of this in-depth study with the perspective of social science, is to reveal a comparative closer qualitative look at the tropicalized PH-approach. It is probably the most civilized building energy-saving strategy on the planet and can systematically keep the threatening increasing heat outside. However, before utilizing the concept, herein need to investigate why PH-technology as a whole concept with all its modules discussed earlier has been very slow to “go South” into the tropical region (the original PH will be referred to as “PH1”). The reason is that some qualitative differences of the more affordable and more simplistic tropicalized “PH2” make it easier and more realistic to penetrate the market, without letting go meaningful R&D-insights of PH1. As a probably facilitating future solution, the result is the triple-tabled option to utilise more synergies between the usually closed PH1 and the more open and flexibly naturally ventilated PH2. Unlike the PH-platform, ZEMCH is a related concept which tries to cater specifically to the significantly growing market for lower-income homes to go for carbonless energy. The conclusion is that scaling for residential buildings as mass products using passive house technology in combination with ZEMCH could turn out to become an important topic. It comprises the question in how far low or no carbon affordable homes based on the PH-concept in combination with ZEMCH-applications also may come into play as standard and to help mother Earth’s struggle for survival.
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Thie, Conal, Sean Quallen, Ahmed Ibrahim, Tao Xing, and Brian Johnson. "Study of Energy Saving Using Silica Aerogel Insulation in a Residential Building." Gels 9, no. 2 (January 19, 2023): 86. http://dx.doi.org/10.3390/gels9020086.
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Energy consumption, specifically in the building sector, is expected to rise. One potential way to reduce energy consumption, or to slow this increase, is to reduce the heat loss in residential homes. Silica aerogels have grown in popularity as an insulating material due to their extremely low thermal conductivity. However, the benefits of using silica aerogels as an insulator in residential buildings have not been thoroughly studied. To understand the benefits of using silica aerogels as a thermal insulator in residential homes, experimentally validated simulations were performed. The simulations were performed on a model of a full-scale residential house using the multiphysics software ANSYS FLUENT 2019 R2. The simulations helped predict the actual saving benefits of using aerogels as an insulator. Aerogels have the potential to be used as an insulator in both the walls and windows due to its semitransparency. The results showed that the average kWh savings using one half-inch layer of wall aerogel insulation coupled with window aerogel insulation was 20.9% for the single-family house compared to traditional insulation. On average, the energy lost through the windows was 39.1% lower when using aerogel insulation compared to standard insulating materials. The energy lost through the house walls was 13.3% lower on average when using a thin layer of aerogel insulation. While a thin layer of aerogel insulation provided a benefit when used in the house walls, the potential for savings per quantity used was greater in the windows.
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Crossland, Andrew F., Darren Jones, Neal S. Wade, and Sara L. Walker. "Comparison of the Location and Rating of Energy Storage for Renewables Integration in Residential Low Voltage Networks with Overvoltage Constraints." Energies 11, no. 8 (August 6, 2018): 2041. http://dx.doi.org/10.3390/en11082041.
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Expansion of photovoltaic (PV) generation is increasing the challenge for network operators to keep voltages within operational limits. Voltage rise occurs in low voltage (LV) networks when distributed generators export, particularly at times of low demand. However, there is little work quantifying the scale of voltage issues and subsequently potential solutions across large numbers of real networks. In this paper, a method is presented to analyse a large quantity of geographically and topographically varying distribution networks. The impact of PV on voltages in 9163 real LV distribution networks is then quantified. One potential mitigation measure is increased network demand to reduce voltages. In this work, location algorithms are used to identify where increased demand, through energy storage, has the greatest effect on overvoltage. The study explores the impact on overvoltage of two modes of storage installation reflecting differing routes to adoption: purchase of storage by homeowners and purchase by network operators. These scenarios are compared with traditional re-conductoring in the 9163 networks. It is shown that to avoid violation of absolute voltage limits, storage should be installed at strategically important locations. Storage in homes reduces overvoltage, offering clear benefits to the network operator, but very wide deployment is required to completely remove the need for reinforcement.
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Sayigh, Ali. "Up-date: Renewable energy and climate change." Renewable Energy and Environmental Sustainability 6 (2021): 13. http://dx.doi.org/10.1051/rees/2021004.
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The Climate Change crisis is worsening daily. We must start to-day and not to-morrow limiting CO2 emission globally. The Antarctic is melting with alarming speed and causing sea water levels to rise by 24 inches in the Southern Hemisphere. Central Australia is experiencing its worst ever drought and forest fires causing immense damage; on 55 days in 2019 temperatures rose to 48°C while the ground temperature reached 62 °C. Vast tracts of land have been burned with loss of life, homes, produce and wildlife. Yet government reaction was skeptical of the Climate Change connection. At the same time Europe and England have had extreme rainfall and serious extensive flooding. Nowadays many countries have started to take Climate Change extremely seriously and put together plans to reduce or stop the use of coal and other fossil fuels. Most countries have pledged to stop using fossil fuels by 2030. The transport industry accounts for the major part of air pollution through the use of motor vehicles, ships and air transport. In this paper it is demonstrated that motor car usage contributes more than 3500 million metric tons of CO2 each year. UK in November 2020 pledged to combat Climate Change and reduce the emission of CO2 by 50% by 2030. Recently it has announced a ten- point drive to eliminate fossil fuels in transport, agriculture, industry and homes by 2035.Ajman should follow suit and use UK as an example. This paper will summarize the progress of renewable energy globally with examples. Renewable Energy is now a major source of generating electricity worldwide. It is clean, abundant and low cost.
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Aktas, Yasemin D., Kai Wang, Yu Zhou, Murnira Othman, Jenny Stocker, Mark Jackson, Christina Hood, et al. "Outdoor Thermal Comfort and Building Energy Use Potential in Different Land-Use Areas in Tropical Cities: Case of Kuala Lumpur." Atmosphere 11, no. 6 (June 19, 2020): 652. http://dx.doi.org/10.3390/atmos11060652.
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High air temperature and high humidity, combined with low wind speeds, are common trends in the tropical urban climates, which collectively govern heat-induced health risks and outdoor thermal comfort under the given hygrothermal conditions. The impact of different urban land-uses on air temperatures is well-documented by many studies focusing on the urban heat island phenomenon; however, an integrated study of air temperature and humidity, i.e., the human-perceived temperatures, in different land-use areas is essential to understand the impact of hot and humid tropical urban climates on the thermal comfort of urban dwellers for an appraisal of potential health risks and the associated building energy use potential. In this study, we show through near-surface monitoring how these factors vary in distinct land-use areas of Kuala Lumpur city, characterized by different morphological features (high-rise vs. low-rise; compact vs. open), level of anthropogenic heating and evapotranspiration (built-up vs. green areas), and building materials (concrete buildings vs. traditional Malay homes in timber) based on the calculated heat index (HI), apparent temperature (TApp) and equivalent temperature (TE) values in wet and dry seasons. The results show that the felt-like temperatures are almost always higher than the air temperatures in all land-use areas, and this difference is highest in daytime temperatures in green areas during the dry season, by up to about 8 °C (HI)/5 °C (TApp). The TE values are also up to 9% higher in these areas than in built-up areas. We conclude that tackling urban heat island without compromising thermal comfort levels, hence encouraging energy use reduction in buildings to cope with outdoor conditions requires a careful management of humidity levels, as well as a careful selection of building morphology and materials.
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Devarapalli, Hari Prasad, Venkata Samba Sesha Siva Sarma Dhanikonda, and Sitarama Brahmam Gunturi. "Demand-Side Management for Improvement of the Power Quality in Smart Homes Using Non-Intrusive Identification of Appliance Usage Patterns with the True Power Factor." Energies 14, no. 16 (August 8, 2021): 4837. http://dx.doi.org/10.3390/en14164837.
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The proliferation of low-power consumer electronic appliances (LPCEAs) is on the rise in smart homes in order to save energy. On the flip side, the current harmonics induced due to these LPCEAs pollute low-voltage distribution systems’ (LVDSs’) supplies, leading to a poor power factor (PF). Further, the energy meters in an LVDS do not measure both the total harmonic distortion (THD) of the current and the PF, resulting in inaccurate billing for energy consumption. In addition, this impacts the useful lifetime of LPCEAs. A PF that takes the harmonic distortion into account is called the true power factor (TPF). It is imperative to measure it accurately. This article measures the TPF using a four-term minimal sidelobe cosine-windowed enhanced dual-spectrum line interpolated Fast Fourier Transform (FFT). The proposed method was used to measure the TPF with a National Instruments cRIO-9082 real-time (RT) system, and four different LPCEAs in a smart home were considered. The RT results exhibited that the TPF uniquely identified each usage pattern of the LPCEAs and could use them to improve the TPF by suggesting an alternative usage pattern to the consumer. A positive response behavior on the part of the consumer that is in their interest can improve the power quality in a demand-side management application.
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Lindsay, Ana C., Judith A. Salkeld, Mary L. Greaney, and Faith D. Sands. "Latino Family Childcare Providers’ Beliefs, Attitudes, and Practices Related to Promotion of Healthy Behaviors among Preschool Children: A Qualitative Study." Journal of Obesity 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/409742.
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Background. The continuing rise of obesity among Latinos is a public health concern with an immediate need for early prevention. Changes in family structures have increased demand and reliance for child care for young children. Latino children are the fastest-growing segment of the child population in the United States, and research shows that Latino families use preschools and day care centers much less than those of other ethnic groups, apparently because of cultural preferences for family-like care.Objectives. Given that many low income Latino children attend family child care homes (FCCHs), there is a need to explore the role that FCCH providers may play in establishing and reinforcing children’s early healthful eating and physical activity behaviors and consequently in the prevention of childhood obesity.Design. Using purposive sampling, six focus groups were conducted in Spanish with licensed Latino FCCH providersn=44. Data was analyzed to identify recurrent themes.Results. Latino FCCH providers described how they play an influential role in promoting healthful eating and physical activity behaviors of preschool children in their care. They also identified many barriers and challenges in establishing and maintaining healthful nutrition and physical activity behaviors, including high cost of healthy foods, cold weather, and physical environment of FCCH.Conclusions. Latino FCCH providers can have a strong impact in promoting healthful behaviors in low-income, Latino communities. They may be able to effectively deliver interventions targeting low-income, minority families to promote healthful eating and physical activity behaviors and prevent child obesity.
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Kisse, Jolando M., Martin Braun, Simon Letzgus, and Tanja M. Kneiske. "A GIS-Based Planning Approach for Urban Power and Natural Gas Distribution Grids with Different Heat Pump Scenarios." Energies 13, no. 16 (August 5, 2020): 4052. http://dx.doi.org/10.3390/en13164052.
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Next to building insulation, heat pumps driven by electrical compressors (eHPs) or by gas engines (geHPs) can be used to reduce primary energy demand for heating. They come with different investment requirements, operating costs and emissions caused. In addition, they affect both the power and gas grids, which necessitates the assessment of both infrastructures regarding grid expansion planning. To calculate costs and CO2 emissions, 2000 electrical load profiles and 180 different heat demand profiles for single-family homes were simulated and heat pump models were applied. In a case study for a neighborhood energy model, the load profiles were assigned to buildings in an example town using public data on locations, building age and energetic refurbishment variants. In addition, the town’s gas distribution network and low voltage grid were modeled. Power and gas flows were simulated and costs for required grid extensions were calculated for 11% and 16% heat pump penetration. It was found that eHPs have the highest energy costs but will also have the lowest CO2 emissions by 2030 and 2050. For the investigated case, power grid investments of 11,800 euros/year are relatively low compared to gas grid connection costs of 70,400 euros/year. If eHPs and geHPs are combined, a slight reduction of overall costs is possible, but emissions would rise strongly compared to the all-electric case.
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Jacoby, Margarite, Sin Yong Tan, Mohamad Katanbaf, Ali Saffari, Homagni Saha, Zerina Kapetanovic, Jasmine Garland, et al. "WHISPER: Wireless Home Identification and Sensing Platform for Energy Reduction." Journal of Sensor and Actuator Networks 10, no. 4 (December 6, 2021): 71. http://dx.doi.org/10.3390/jsan10040071.
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Many regions of the world benefit from heating, ventilating, and air-conditioning (HVAC) systems to provide productive, comfortable, and healthy indoor environments, which are enabled by automatic building controls. Due to climate change, population growth, and industrialization, HVAC use is globally on the rise. Unfortunately, these systems often operate in a continuous fashion without regard to actual human presence, leading to unnecessary energy consumption. As a result, the heating, ventilation, and cooling of unoccupied building spaces makes a substantial contribution to the harmful environmental impacts associated with carbon-based electric power generation, which is important to remedy. For our modern electric power system, transitioning to low-carbon renewable energy is facilitated by integration with distributed energy resources. Automatic engagement between the grid and consumers will be necessary to enable a clean yet stable electric grid, when integrating these variable and uncertain renewable energy sources. We present the WHISPER (Wireless Home Identification and Sensing Platform for Energy Reduction) system to address the energy and power demand triggered by human presence in homes. The presented system includes a maintenance-free and privacy-preserving human occupancy detection system wherein a local wireless network of battery-free environmental, acoustic energy, and image sensors are deployed to monitor homes, record empirical data for a range of monitored modalities, and transmit it to a base station. Several machine learning algorithms are implemented at the base station to infer human presence based on the received data, harnessing a hierarchical sensor fusion algorithm. Results from the prototype system demonstrate an accuracy in human presence detection in excess of 95%; ongoing commercialization efforts suggest approximately 99% accuracy. Using machine learning, WHISPER enables various applications based on its binary occupancy prediction, allowing situation-specific controls targeted at both personalized smart home and electric grid modernization opportunities.
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Hass, Zachary, Kathleen Abrahamson, Dongjuan Xu, and Valerie Cooke. "Understanding Nursing Home Responses to Minnesota’s New Value Based Reimbursement System." Innovation in Aging 4, Supplement_1 (December 1, 2020): 86–87. http://dx.doi.org/10.1093/geroni/igaa057.285.
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Abstract Even though Value Based Reimbursement (VBR) systems for nursing homes (NH) continue to expand, we have little understanding of how NH respond to VBR. In 2016, Minnesota passed VBR legislation for NHs that increased care-related funding and tied increases to a facility’s composite quality score. While care-related expenditures increased with VBR, the incentive for quality did not work as intended. We investigated the differential responses of facilities in their care-related expenditures and quality scores. Data were derived from cost reports and quality measures for the years 2013-2017 from 300 free-standing Minnesota NHs. Latent Class Growth Analysis was used to cluster facilities by their joint care-related cost and quality score trajectories over the period. Three interpretable trajectory clusters emerged: medium-to-high cost and medium-to-high quality (n=172), low cost and medium-to-high quality (n=54), and low cost and low quality (n=74), all during the pre-VBR period. In all three clusters cost rose significantly with VBR, but only in the low cost and low quality cluster did quality also rise significantly. The quality improving cluster had the highest percentage of government-owned and rural facilities as well as the largest annual increase in care related spending. The medium-to-high cost and medium-to-high quality cluster had the highest concentration of urban facilities (Twin City Metro Area) and were the most likely to be non-profit and chain owned. Although the new VBR system appeared effective in achieving its goals for a subset of facilities with lowest cost and quality, the majority of facilities increased care-related costs without improved quality.
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H Ojah Maharaj, Shrimatee. "Factors Affecting the Supply of “Missing Middle” Housing Types in Walkable Urban Core Neighborhoods." Muma Business Review 4 (2020): 001–15. http://dx.doi.org/10.28945/4544.
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Housing preferences are changing. According to (Koebel, Lang, & Danielsen, 2004; Kolson, 2016; Myers & Ryu, 2008; Shaver, 2017; Woo, 2016), the largest demographic, the millennials, prefer low- to mid-rise housing units that are in the walkable urban core areas. These areas have access to cultural activities, entertainment, restaurants, shopping and other amenities such as parks. The retiring baby boomers who are downsizing from their single-family suburban homes are also seeking the same. As suggested by Parolek (CNU. 2015).), the Missing Middle Housing types (MMH) are one possible solution to help meet the demand. However, the demand is greater than the supply (Koebel et al., 2004; Kolson, 2016; Myers & Ryu, 2008; Shaver, 2017). This review discusses the factors that affect the supply of the MMH types. It reveals that although these housing types once existed in the urban core, attempts to reintroduce them in the area meet with opposition from several stakeholders. Additional factors which hurt the supply of MMH types include land use and zoning regulations, a lack of developer interest to develop these units, and a lack of developer financing (Glaeser et al, 2009, Doherty, 2017).
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Li, Jiayang. "Applications of Wireless Communication in a New Dual Branch CTS Charge Pump Based on Employing Clock Matched Technology." Wireless Communications and Mobile Computing 2021 (August 14, 2021): 1–9. http://dx.doi.org/10.1155/2021/4014795.
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With the increase in communication requirements, new communication technologies and implementation methods have developed rapidly. The rise of emerging markets such as the Internet of Things, smart homes, smart cities, and wearables has promoted the development of wireless communication integrated circuits in the direction of monolithic, low energy consumption, and high energy efficiency. This paper proposes a new dual branch charge pump based on CTS charge pump with enhanced current drive capability and undesired charge transfer completely eliminated. Clock matched technology is proposed to completely eliminate undesired charge transfer caused by delay turn on and off of the auxiliary transistors in the traditional CTS charge pump. The current drive capability is enhanced by employing NMOS transistors with 2Vdd gate drive voltage, while traditional dual branch CTS charge pumps are based on PMOS with 1Vdd gate drive voltage. The output voltage ripple is also reduced resulting from a dual branch structure. Simulation results of output voltage gain and power efficiency for the proposed charge pump and other traditional charge pumps are provided. Comparisons are made to show the improvement of the proposed charge pump compared with other traditional charge pumps.
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Aly, Aly Mousaad. "Influence of Turbulence, Orientation, and Site Configuration on the Response of Buildings to Extreme Wind." Scientific World Journal 2014 (2014): 1–15. http://dx.doi.org/10.1155/2014/178465.
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Atmospheric turbulence results from the vertical movement of air, together with flow disturbances around surface obstacles which make low- and moderate-level winds extremely irregular. Recent advancements in wind engineering have led to the construction of new facilities for testing residential homes at relatively high Reynolds numbers. However, the generation of a fully developed turbulence in these facilities is challenging. The author proposed techniques for the testing of residential buildings and architectural features in flows that lack fully developed turbulence. While these methods are effective for small structures, the extension of the approach for large and flexible structures is not possible yet. The purpose of this study is to investigate the role of turbulence in the response of tall buildings to extreme winds. In addition, the paper presents a detailed analysis to investigate the influence of upstream terrain conditions, wind direction angle (orientation), and the interference effect from the surrounding on the response of high-rise buildings. The methodology presented can be followed to help decision makers to choose among innovative solutions like aerodynamic mitigation, structural member size adjustment, and/or damping enhancement, with an objective to improve the resiliency and the serviceability of buildings.
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Di Ruscio, Francesco, Giorgio Guzzetta, Jørgen Vildershøj Bjørnholt, Truls Michael Leegaard, Aina Elisabeth Fossum Moen, Stefano Merler, and Birgitte Freiesleben de Blasio. "Quantifying the transmission dynamics of MRSA in the community and healthcare settings in a low-prevalence country." Proceedings of the National Academy of Sciences 116, no. 29 (July 1, 2019): 14599–605. http://dx.doi.org/10.1073/pnas.1900959116.
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Methicillin-resistant Staphylococcus aureus (MRSA) is a primarily nosocomial pathogen that, in recent years, has increasingly spread to the general population. The rising prevalence of MRSA in the community implies more frequent introductions in healthcare settings that could jeopardize the effectiveness of infection-control procedures. To investigate the epidemiological dynamics of MRSA in a low-prevalence country, we developed an individual-based model (IBM) reproducing the population’s sociodemography, explicitly representing households, hospitals, and nursing homes. The model was calibrated to surveillance data from the Norwegian national registry (2008–2015) and to published household prevalence data. We estimated an effective reproductive number of 0.68 (95% CI 0.47–0.90), suggesting that the observed rise in MRSA infections is not due to an ongoing epidemic but driven by more frequent acquisitions abroad. As a result of MRSA importations, an almost twofold increase in the prevalence of carriage was estimated over the study period, in 2015 reaching a value of 0.37% (0.25–0.54%) in the community and 1.11% (0.79–1.59%) in hospitalized patients. Household transmission accounted for half of new MRSA acquisitions, indicating this setting as a potential target for preventive strategies. However, nosocomial acquisition was still the primary source of symptomatic disease, which reinforces the importance of hospital-based transmission control. Although our results indicate little reason for concern about MRSA transmission in low-prevalence settings in the immediate future, the increases in importation and global circulation highlight the need for coordinated initiatives to reduce the spread of antibiotic resistance worldwide.
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Wittenberg, Hartmut, and Andreas Schachner. "The ponds of Hattuša – early groundwater management in the Hittite kingdom." Water Supply 13, no. 3 (May 1, 2013): 692–98. http://dx.doi.org/10.2166/ws.2013.025.
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From about 1650 until 1200 BC Hattuša (pronounced Hattusha) was the capital of the Hittite Empire in central Asia Minor. On the steep terrain of today's ruined city lived and worked thousands of people whose homes, cattle, tools and places of worship had to be supplied with water. The question arose regarding how water was conveyed into the large-scale ponds in the urban area. The silted East Ponds (36,000 m3) and South Ponds (20,000 m3) have been excavated since the 1980s. A supply of the large volumes of water by a long pipeline from outside the city was repeatedly discussed. Due to the topographic, hydraulic and geo-hydrological conditions however, a long distance supply would have been uneconomic and also unnecessary. Still today, many willow fountains in the region are fed by artesian groundwater. It was therefore assumed that the ponds were cut into the slope aquifers and filled during the wet season. To verify this hypothesis, groundwater monitoring stations were installed in the autumn of 2009 directly uphill of the pond banks. Observed groundwater levels 2009–2011 are low in summer but rise above the former pond surfaces during winter. The Hittites used exfiltrating groundwater also in other reservoirs avoiding hefty and strongly varying surface inflows.
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Nath, Shruti, Mark Dewsbury, Hartwig Künzel, and Phillipa Watson. "Mould Growth Risks for a Clay Masonry Veneer External Wall System in a Temperate Climate." Atmosphere 13, no. 11 (October 25, 2022): 1755. http://dx.doi.org/10.3390/atmos13111755.
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To reduce greenhouse gas emissions, nations have introduced energy efficiency regulations for new and existing buildings. This has been considered advantageous as more efficient building envelopes would reduce energy consumed to heat and cool home interiors to within accepted thermal comfort bandwidths. However, as these methods have been adopted, many nations have identified an unintended visible presence of surface and interstitial condensation and mould in new code-compliant buildings. In Australia, it has been estimated that up to 50% of Australian houses constructed in the last decade (2006–2016) have a presence of condensation and mould. Australia introduced its first condensation and mould-related building regulations for new homes in 2019. This paper reports on the hygrothermal and mould growth analysis of the most common low-rise residential external wall system, a timber-framed clay masonry veneer wall. A key component of this paper discusses the application of innovative methods in the Australian context. The external wall’s moisture accumulation and mould growth were simulated for a period of ten years using the transient hygrothermal simulation tool, WUFI® Pro, and the mould growth model, WUFI® VTT. This study identified significant risks for this typical external wall system when constructed in a temperate climate.
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Barker, Kate. "Redesigning Housing Policy." National Institute Economic Review 250 (November 2019): R69—R74. http://dx.doi.org/10.1177/002795011925000120.
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Executive SummaryDiscussion of the UK's housing crisis is of long date, and tends to focus on a simple story about a mismatch in housing supply and demand and the consequent need to build more homes. Yet the reality is more complex with multiple sub-plots including social housing, stress in the private rented sector, benefits, subsidies and ultimately taxation of home ownership.At the bottom of the market, the crisis is real and acute, as manifested in a sharp increase in homelessness and rough sleeping. The inescapable answer is to increase the depleted stock of social housing and widen eligibility criteria. An increase of 100,000 social units a year in England would help address this problem, as well as alleviate the financial squeeze on tenants of the private rented sector, whose number has grown sharply in the past 15 years in tandem with a steep rise in the housing benefit bill. Recent efforts to curb housing benefit have further increased distress, so it will be necessary to consider increasing benefits again alongside regulatory interventions with private landlords.In the home ownership market, recent government intervention has taken the form of the much-criticised Help-to-Buy Equity Loan scheme. This market policy to support new-build homes should be wound down and replaced by a scheme to endow all young people with a capital sum that they could use for second-hand homes as well. More generally, a more sophisticated approach to planning home-building is needed, both for assessing overall numbers and their regional distribution and in financing the supporting infrastructure.But none of these measures is a panacea for a housing crisis that is in large part a symptom of problems in the wider economy, such as low relative wages for young people, a lack of clarity about environmental issues, and failing places. A successful policy package to address the distorted structure of the housing market must also grasp the most difficult nettle of all – namely the way the tax benefits of owner-occupation incentivise overconsumption of housing and a widening wealth gap between renters and home owners, and between owners in different parts of the country. If we spend more to help those who struggle to afford decent housing, then it is only just to raise more taxation from those who benefit from restrictions on housing supply – whether through reform to council tax, a wider wealth tax or a limited form of Capital Gains Tax on principal residences.
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Singh, Bharat Raj, and Amar Bahadur Singh. "Glacier Melting, Disaster and Awareness Programme." SAMRIDDHI : A Journal of Physical Sciences, Engineering and Technology 8, no. 02 (December 25, 2016): 131–38. http://dx.doi.org/10.18090/samriddhi.v8i2.7147.
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Large ice formations, like glaciers and the polar ice caps, naturally melt back a bit each summer. But, in the winter, snows, made primarily from evaporated seawater, are generally sufficient to balance out the melting. Recently, though, persistently higher temperatures caused by global warming have led to greaterthan- average summer melting as well as diminished snowfall due to later winters and earlier springs. This imbalance results in a significant net gain in runoff versus evaporation for the ocean, causing sea levels to rise. Satellite measurements tell us that over the past century, the Global Mean Sea Level (GMSL) has risen by 4 to 8 inches (10 to 20 centimeters). However, the annual rate of rise over the past 20 years has been 0.13 inches (3.2 millimeters) a year, roughly twice the average speed of the preceding 80 years. As with glaciers and the ice caps, increased heat is causing the massive ice sheets, that cover Greenland and Antarctica to melt at an accelerated pace. Scientists also believe ice-melt water from above and seawater from below is seeping beneath Greenland's and West Antarctica's ice sheets, effectively lubricating ice streams and causing them to move more quickly into the sea. Moreover, higher sea temperatures are causing the massive ice shelves that extend out from Antarctica to melt from below, weaken, and break off. When sea levels rise rapidly, as they have been doing, even a small increase can have devastating effect on coastal habitats. As seawater reaches farther inland, it can cause destructive erosion, flooding of wetlands, contamination of aquifers and agricultural soils, and lost habitat for fish, birds, and plants. When large storms hit land, higher sea levels mean bigger, more powerful storm surges that can strip away everything in their path. In addition, hundreds of millions of people live in areas that will become increasingly vulnerable to flooding. Higher sea levels would force them to abandon their homes and relocate. Low-lying islands could be submerged completely. Thus, it needs launching of serious awareness programme through print media, electronic media to curb the glacier melting by reducing heavy consumption of hydrocarbon and focus on zero pollution researches to develop energy production alternatives.
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Petrovski, Aleksandar, Jelena Ivanovic-Sekularac, and Nenad Sekularac. "Comparison of wooden and conventional houses sustainability: Increasing application of modified wood in R. of Macedonia." Thermal Science 23, no. 3 Part B (2019): 1943–55. http://dx.doi.org/10.2298/tsci180705292p.
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The residential sector in Republic of North Macedonia, situated in south-east Europe, is responsible for the consumption of significant amounts of resources and for the production of large amount of emissions and waste. The increased application of wood products can substantially improve these conditions and contribute towards increasing the sustainability in the construction industry and the creation of sustainable homes. The contribution of this paper is the simulation of four different alternatives of residential buildings in the Republic of North Macedonia, evaluated in terms of energy performance and life-cycle assessment for the "cradle to gate" phase. The results of this study revealed that by replacing conventional concrete and masonry constructions with wooden constructions in low-rise family houses, the carbon emissions can be reduced up to 145%. The contribution of this paper is the simulation and analysis of the energy performance by using building performance simulation tools and life-cycle assessment of a residential building and its optimization through several models. The results give significant insight on the influence that the different construction materials have on the environment and buildings performance. Also, the research enables stimulation of the construction industry in utilizing wooden structures and delivering legislation that could increase their use. These actions would provide means for the development of sustainable buildings, neighborhoods and sustainable development of the Republic of North Macedonia.
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Banks, Adria, Colin Grist, Jonathan Heller, and Hyunwoo Lim. "Field Measurement of Central CO2 Heat Pump Water Heater for Multifamily Retrofit." Sustainability 14, no. 13 (July 1, 2022): 8048. http://dx.doi.org/10.3390/su14138048.
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Domestic hot water heating of multifamily buildings accounts for a substantial portion of the energy load of existing buildings. This load is made up of both the energy required to produce hot water and the energy needed to maintain the temperature of the heated water within a building’s distribution piping so that heat can be promptly delivered to building occupants as needed. Properly designed heat pump water heater (HPWH) systems have the ability to improve efficiency in both water heating and temperature control operations. Further, CO2 heat pump technology reflects a shift away from traditional refrigerants and toward refrigerants with low global warming potential (GWP). In this paper’s case study, a design consisting of multiple CO2 heat pump water heaters (commonly used in single-family homes) with a novel “swing tank” was proposed to meet the demand for domestic hot water heating and recirculation loop temperature maintenance. The proposed design was applied to the retrofit of a 60-unit, low-rise, multi-family building located in the Pacific Northwest of the United States. The purpose of this paper is to verify the performance of the system including the proposed “swing tank” in a centralized SHW system using CO2 HPWH. It also provides practical information and lessons learned from the retrofit project. Long-term monitoring data showed that the system had a coefficient of performance (COP) of three or greater and provided an average of 20 gallons of hot water per day per apartment. The results of this work indicate that residential-scale CO2 HPWH equipment and a “swing tank” design can efficiently provide domestic hot water heating and temperature maintenance for mid-sized multifamily buildings.
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Otaegi, Jorge, Rufino J. Hernández, Xabat Oregi, Alexander Martín-Garín, and Iñigo Rodríguez-Vidal. "Comparative Analysis of the Effect of the Evolution of Energy Saving Regulations on the Indoor Summer Comfort of Five Homes on the Coast of the Basque Country." Buildings 12, no. 7 (July 19, 2022): 1047. http://dx.doi.org/10.3390/buildings12071047.
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In the last decade, several European directives have been established to contribute to the 2020, 2030 and 2050 energy saving targets and impose energy efficiency requirements for new construction, existing buildings and building renovation operations. One of the ways to achieve said objectives is to rely on the most demanding energy efficiency labels existing in Europe, such as Passivhaus, and to implement similar concepts into the national energy regulations of European countries based on a high-performance thermal envelope (high insulation and high-performance windows), high airtightness and high-performance heat-recovery ventilation systems, and solar heat harvesting. This energy conservation concept has shown to be effective for houses with low-density occupation in cold climates, but may cause severe overheating problems in denser collective housing in temperate and hot climates with higher solar radiation. To assess this impact, five flats in three developments from different periods that range from no insulation at all to a nZEB, Passivhaus-certified high-rise are compared in this paper, using data from a monitoring campaign during the summer of 2020. The results show and quantify the strong impact the evolution of the energy saving regulatory trend has had on summer indoor comfort, which may in some cases lead to previously unnecessary air conditioning for cooling and, ultimately, be counterproductive towards the end goals of reducing energy consumption and greenhouse-effect gas emissions and mitigating climate change.
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Kasharina, T. P., and N. N. Protsenko. "DEVELOPMENT OF THE ECOLOGICAL INFRASTRUCTURE OF THE FAR NORTH." Construction and Geotechnics 10, no. 2 (December 15, 2019): 133–42. http://dx.doi.org/10.15593/2224-9826/2019.4.13.
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This article discusses the creation and development of sustainable natural-technical systems that favorably affect the living conditions of the indigenous peoples of the Far North; developing means to protect them from negative impacts; New methods and criteria for assessing environmental factors affecting them, including urban construction. Sustainable construction provides a new paradigm of attitudes towards nature: the traditions of the indigenous population, because the buildings of the middle zone are not always perceived for the conditions of the Far North; the introduction of a set of completely new principles that were not considered during construction: the quality of the living environment; resource conservation, pollution control (emissions), social equity, etc.At present, the infrastructure field has a significant impact, which allows speeding up the process of obtaining the necessary data on a specific issue. For the regions of the Arctic (Extreme North), the creation of eco-homes, that is, effective low-rise, bioclimatic, blocked houses or a house with a plot of land and using it in conjunction with agricultural technology - permoculture, which applies to all aspects of ecology, economics and public life, is most appropriate. , including the contribution of man and the creation of his own ecosystems necessary for sustainable agriculture in specific zones. When developing plans for integrated innovation projects, they take into account: economic and environmental issues of design solutions; the creation of technical systems that provide the population with food.
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Tokarev, A., and N. Sidorenko. "“UDARNIK” SANATORIUM IN ZHELEZNOVODSK: ABOUT INFLUENCE OF URBAN-PLANNING FACTORS ON ARCHITECTURE." Bulletin of Belgorod State Technological University named after. V. G. Shukhov 5, no. 9 (October 3, 2020): 37–45. http://dx.doi.org/10.34031/2071-7318-2020-5-9-37-45.
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The provision of recreation to the working population was one of the main tasks that the government of the USSR had to solve already during the first years of the Soviet regime. In this regard, they prescribed a line of improvement concerning the state of health resort areas of the country. Large-scale realization of new holiday homes, health resorts and medical complexes had started in the areas, which were located along the Black Sea coast, and in the towns of the Caucasian Mineral Waters. Design in resort areas was complicated by the presence of mountainous terrain and the special structure of historical buildings. A successful example of a medical facility in a resort city is the building of the “Udarnik” sanatorium, which was designed by Fomin I. A. and Roslavlev M. I. in Zheleznovodsk. The article is devoted to this building. The paper provides an analysis of the formation of the urban-planning situation that determined the location and shape of the design area. The initial and implemented schemes of planning organization of the health resort’s territory are analyzed. The influence of the historical context of the area on the volumetric solution of the structure is revealed. The relationship between the health resort and other significant objects of Zheleznovodsk is established. In the urban-planning decisions of «Udarnik», the authors managed to take into account the surrounding low-rise buildings and the significant height difference of the landscape.
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Almadhoni, Khalid H., and Mohammad A. Ammar. "THE CORROSION PROBLEMS IN HOUSEHOLD WATER HEATERS OF SABRATHA CITY." Scientific Journal of Applied Sciences of Sabratha University 3, no. 2 (September 27, 2020): 77–90. http://dx.doi.org/10.47891/sabujas.v3i2.77-90.
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The corrosion destructive action can reach the home of millions of people, thus costing a tremendous amount of money and causing a great inconvenience. With the up rise of brackish water in Sabratha city, corrosion can damage water heaters, pipe network, refrigerators and many more items found at homes. In addition, in the absence of adequate specifications, major failures of water heaters have been reported in the recent years creating a great deal of concern. This study investigated the reasons of water heaters failure, and the methods needed to overcome or limit such a problem.
Three main components, which have a direct relationship with the corrosion phenomena of heaters, were studied namely water, heater storage tank and heating element cover. To achieve that a chemical analysis of water samples and an examination of the microstructure and the chemical composition of heater storage tank and the heating element cover were carried out. The results revealed that the likelihood of forming a scale of Ca CO3 increases with increasing temperature, salt concentrations and the PH value.
The metallographic examination showed the presence of a ferrite-pearlite structure. The microstructural studies revealed the presence of un-equivalent distribution of carbon content responsible for galvanic corrosion. They also revealed that grain growth in Heat Affective Zone (H. A. Z.) was responsible for pitting type corrosion. The weld showed typical WIDMANSTAATEN structure. Chemical composition of the sample indicated that the structure belongs to the low carbon steel which is identical to ASM 1020, and that the cover of heating element is made of pure copper.
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Singh, Brajendra K., Joseph Walker, Prabasaj Paul, Sujan Reddy, John A. Jernigan, John A. Jernigan, and Rachel Slayton. "433. Role of Community Vaccination Coverage in Controlling Future COVID-19 Outbreaks in Nursing Homes: A Modeling Study." Open Forum Infectious Diseases 8, Supplement_1 (November 1, 2021): S319. http://dx.doi.org/10.1093/ofid/ofab466.633.
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Abstract Background As of May 2, 2021, U.S. nursing homes (NHs) have reported >651,000 COVID-19 cases and >132,000 deaths to CDC’s National Healthcare Safety Network. Since U.S. COVID-19 vaccination coverage is increasing, we investigate the role of vaccination in controlling future COVID-19 outbreaks. Methods We developed a stochastic, compartmental model of SARS-CoV-2 transmission in a theoretical 100-bed NH with a staff of 99 healthcare personnel (HCP) in a community of 20,000 people. We modeled admission and discharge of residents (parameterized with Centers for Medicare & Medicaid Services data), assuming the following: temporary replacement of HCP when tested positive; daily visits to NH residents; isolation of COVID-19 positive residents; personal protective equipment (PPE) use by HCP; and symptom-based testing of residents and staff plus weekly asymptomatic testing of HCP and facility-wide outbreak testing once a COVID-19 case is identified. We systematically varied coverage of an mRNA vaccine among residents and HCP, and in the community. Simulations also varied PPE adherence, defined as the percentage of time in the facility that HCP properly used recommended PPE (25%, 50% or 75% of the time). Infection was initialized in the community with 40 infectious cases, and initial infection in the NH was allowed after 14 days of vaccine dose 1. Simulations were run for 6 months after dose 2 in the NH. Results were summarized over 1000 simulations. Results At 60% community coverage, expected cumulative symptomatic resident cases over 6 months were ≤5, due to low importation of COVID-19 infection from the community, with further reduction at higher coverage among HCP (Figure 1). Uncertainty bounds narrowed as NH resident coverage or PPE adherence increased. Results were similar if testing of staff and residents stopped. Probability of an outbreak within 4 weeks of dose 2 remained below 5% with high community coverage (Figure 2). Figure 1. Drop in symptomatic cases in nursing home (NH) residents with rise in COVID-19 vaccine coverage in the community, increase in personal protective equipment (PPE) adherence, or increase in coverage among NH residents. In each panel, we plotted the mean number of cumulative symptomatic cases of COVID-19 in NH residents after 6 months since vaccine dose 2 (given 28 days after dose 1) and their 90% confidence interval (CI) for three healthcare personnel (HCP) coverage scenarios: 40%, 60%, or 80%. Coverage in HCP was independently modeled of community coverage. The top row is for NH resident coverage of 65%, the middle for 75%, and the bottom row for 85%. The columns (left to right) are for facility-level PPE adherence of 25% (low adherence), 50% (intermediate adherence), and 75% (high adherence). Weekly asymptomatic testing of HCP and twice-weekly outbreak testing in the facility were modeled with an assumed point-of-care test sensitivity of 80% (symptomatic persons) and 60% (asymptomatic persons) and with specificity of 100% and test turnaround time of 15 minutes. Figure 2. Probability of a COVID-19 outbreak in a nursing home (NH) decreased with increase in vaccine coverage in the community or in healthcare personnel (HCP). An outbreak is defined as an occurrence of 2 or more cases within 4 weeks of dose 2. Probability of no outbreak was calculated by counting how many simulations out of a total of 1000 simulations had ≤1 symptomatic case in NH residents or HCP within 4 weeks after dose 2 was administered in the nursing home. The first vaccine dose in residents and HCP was assumed to be given on day 1, and the second dose 28 days later. A probability value and its 90%-confidence interval (CI) at a given community and HCP coverage was calculated by pooling model outputs for 9 sets (3 PPE adherence values X 3 resident coverage levels) of model simulations. Simulations were performed assuming no asymptomatic testing or facility-wide outbreak testing. Conclusion Results suggest that increasing community vaccination coverage leads to fewer infections in NH residents. Testing asymptomatic residents and staff may have limited value when vaccination coverage is high. High adherence to recommended PPE may increase the likelihood that future COVID-19 outbreaks can be contained. Disclosures John A. Jernigan, MD, MS, Nothing to disclose
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Rahim, Adina, Ayesha Maqbool, Alina Mirza, Farkhanda Afzal, and Ikram Asghar. "DepTSol: An Improved Deep-Learning- and Time-of-Flight-Based Real-Time Social Distance Monitoring Approach under Various Low-Light Conditions." Electronics 11, no. 3 (February 3, 2022): 458. http://dx.doi.org/10.3390/electronics11030458.
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Social distancing is an utmost reliable practice to minimise the spread of coronavirus disease (COVID-19). As the new variant of COVID-19 is emerging, healthcare organisations are concerned with controlling the death and infection rates. Different COVID-19 vaccines have been developed and administered worldwide. However, presently developed vaccine quantity is not sufficient to fulfil the needs of the world’s population. The precautionary measures still rely on personal preventive strategies. The sharp rise in infections has forced governments to reimpose restrictions. Governments are forcing people to maintain at least 6 feet (ft) of safe physical distance to stay safe. With summers, low-light conditions can become challenging. Especially in the cities of underdeveloped countries, where poor ventilated and congested homes cause people to gather in open spaces such as parks, streets, and markets. Besides this, in summer, large friends and family gatherings mostly take place at night. It is necessary to take precautionary measures to avoid more drastic results in such situations. To support the law and order bodies in maintaining social distancing using Social Internet of Things (SIoT), the world is considering automated systems. To address the identification of violations of a social distancing Standard Operating procedure (SOP) in low-light environments via smart, automated cyber-physical solutions, we propose an effective social distance monitoring approach named DepTSol. We propose a low-cost and easy-to-maintain motionless monocular time-of-flight (ToF) camera and deep-learning-based object detection algorithms for real-time social distance monitoring. The proposed approach detects people in low-light environments and calculates their distance in terms of pixels. We convert the predicted pixel distance into real-world units and compare it with the specified safety threshold value. The system highlights people violating the safe distance. The proposed technique is evaluated by COCO evaluation metrics and has achieved a good speed–accuracy trade-off with 51.2 frames per second (fps) and a 99.7% mean average precision (mAP) score. Besides the provision of an effective social distance monitoring approach, we perform a comparative analysis between one-stage object detectors and evaluate their performance in low-light environments. This evaluation will pave the way for researchers to study the field further and will enlighten the efficiency of deep-learning algorithms in timely responsive real-world applications.
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Salem, Saber, and Armin Rosencranz. "Climate-Induced Mass Relocation in Fiji." Environmental Policy and Law 50, no. 4-5 (March 12, 2021): 391–97. http://dx.doi.org/10.3233/epl-200240.
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Climate change is, undeniably, a global phenomenon, which requires timely and sincere global efforts and commitments to save the planet before it is too late. The island nations in the blue Pacific region are arguably experiencing the destructive nature of climate change more than any other nation in the world. Scientists warn that this slow-motion phenomenon is claiming entire nations, which will not exist on the face of the earth as early as next century. Sea-level rise is one of the biggest existential threats that the region is facing. Countries such as Tuvalu, Kiribati and Marshall Islands have already started sinking with their citizens looking for alternative countries. In Fiji, more than 200 low-lying villages are at risk of sinking and the government hopes to relocate these communities to higher ground, despite the pressure this would place on its weak economy. The relocatees will lose their most precious commodity, the land, which is their identity, status and source of survival. The other most precious commodity to which they attach a sense of belonging and will be lost for life are their ancestral homes, culture and traditional way of life. The relocation plan also creates distance between people and the sea, which is the source of their food. This article argues that despite being considered an effective adaptation mechanism to climate change, the relocation plan is facing multiple hurdles. The plan is far beyond the financial capacity and technical prowess of the Fijian government. The other possible alternative to mass relocation is strengthening the locally-made seawalls into strong durable structures, which can withstand the strength of cyclones and be an effective barrier to further shoreline erosion. The small island developing nations of the Pacific region will need financial and technical assistance from the industrialised nations to implement such a project successfully.
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Hao, Huili, Devon Eulie, and Allison Weide. "An Integrative Approach to Assessing Property Owner Perceptions and Modeled Risk to Coastal Hazards." ISPRS International Journal of Geo-Information 9, no. 4 (April 23, 2020): 275. http://dx.doi.org/10.3390/ijgi9040275.
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Coastal communities are increasingly vulnerable to changes in climate and weather, as well as sea-level rise and coastal erosion. The impact of these hazards can be very costly, and not just in terms of property damage, but also in lost revenue as many coastal communities are also tourism-based economies. The goal of this study is to investigate the awareness and attitudes of full-time residents and second-home property owners regarding the impact of climate and weather on property ownership and to identify the factors that most influences these attitudes in three coastal counties (Brunswick, Currituck, and Pender) of North Carolina, USA. The majority of previous studies have focused on only full-time residents’ risk perceptions. Given the fact that these coastal communities have a high percentages of second homes, this study fills that research gap by including second-home owners. This study integrates both social (survey data) and physical (geospatial coastal hazards data) aspects of vulnerability into a single assessment to understand the determinants of property owners’ risk perceptions and compare their perceived risks with their physical vulnerability. The study also compared the utility of a global ordinary least square (OLS) model with a local geographically weighted regression (GWR) model to identify explanatory variables in the dataset. The GWR was found to be a slightly better fit for the data with an R2 of 0.248 (compared to 0.206 for the OLS). However, this was still relatively low and indicated that this study likely did not capture all of the factors that influence the perceptions of vulnerability in patterns of property ownership (whether full-time residents or second-home owners). The geospatial variables used to determine coastal vulnerability were found not to significantly impact perceptions related property ownership, but did provide additional insight in explaining spatial patterns of the response variable within each county.
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Lawal, Muhammad Aminu, Riaz Ahmed Shaikh, and Syed Raheel Hassan. "An Anomaly Mitigation Framework for IoT Using Fog Computing." Electronics 9, no. 10 (September 24, 2020): 1565. http://dx.doi.org/10.3390/electronics9101565.
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The advancement in IoT has prompted its application in areas such as smart homes, smart cities, etc., and this has aided its exponential growth. However, alongside this development, IoT networks are experiencing a rise in security challenges such as botnet attacks, which often appear as network anomalies. Similarly, providing security solutions has been challenging due to the low resources that characterize the devices in IoT networks. To overcome these challenges, the fog computing paradigm has provided an enabling environment that offers additional resources for deploying security solutions such as anomaly mitigation schemes. In this paper, we propose a hybrid anomaly mitigation framework for IoT using fog computing to ensure faster and accurate anomaly detection. The framework employs signature- and anomaly-based detection methodologies for its two modules, respectively. The signature-based module utilizes a database of attack sources (blacklisted IP addresses) to ensure faster detection when attacks are executed from the blacklisted IP address, while the anomaly-based module uses an extreme gradient boosting algorithm for accurate classification of network traffic flow into normal or abnormal. We evaluated the performance of both modules using an IoT-based dataset in terms response time for the signature-based module and accuracy in binary and multiclass classification for the anomaly-based module. The results show that the signature-based module achieves a fast attack detection of at least six times faster than the anomaly-based module in each number of instances evaluated. The anomaly-based module using the XGBoost classifier detects attacks with an accuracy of 99% and at least 97% for average recall, average precision, and average F1 score for binary and multiclass classification. Additionally, it recorded 0.05 in terms of false-positive rates.
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Porio, Emma. "Vulnerability, Adaptation, and Resilience to Floods and Climate Change-Related Risks among Marginal, Riverine Communities in Metro Manila." Asian Journal of Social Science 39, no. 4 (2011): 425–45. http://dx.doi.org/10.1163/156853111x597260.
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Abstract This study examines the vulnerability, adaptation, and resilience of urban poor households living in the riverine communities of the three flood prone areas in Metro Manila, namely, (1) Pasig-Marikina River basin, (2) West Mangahan, and (3) the KAMANAVA area (Kalookan, Malabon, Navotas, Valenzuela). Based on a survey of 300 urban poor households in 14 communities located in these flood basins, the study found that the environmental-ecological vulnerability of the low-lying flood prone areas interacts strongly with the social vulnerability of urban poor households, highlighting the effects of climate related changes (sea level rise, increased typhoons, intensity of monsoon rains, floods and tidal/storm surges) on this vulnerable population. Most of the households have low-incomes, live in slum/squatter settlements and do not have adequate access to potable water, electricity, health, sewage and sanitation facilities. About two-thirds of them suffered losses (e.g., income, work, health/sickness, household appliances/things, housing damage) from typhoons, floods, and tidal/storm surges but only a small portion of them obtained help from formal institutions (e.g., local government units or LGUs, charitable agencies) and informal support networks (relatives/neighbors/friends). Of these, a third of these households appeared more vulnerable and consistently incurred higher losses (e.g., income and workdays) and intense inconveniences (e.g., water source buried by floods, toilets blocked and overflowed with wastes/large worms to their floors) compared to their neighbors. Both urban poor households and their local governments have formulated adaptation strategies in response to the increasing effects of climate change. Few of the local governments built river barriers, improved their drainage systems, installed water diversion techniques (e.g., “bombastic”) and disaster warning systems and increased the capacity of their officials to assist during evacuations. Meanwhile, some urban poor households have adapted to a “water-based lifestyle” (e.g., raising the floors/increasing the number of floors of their homes, building makeshift bridges among households in swampy areas, building Styrofoam boats for transport, etc.). But on the whole, both the urban poor residents and the formal institutions (LGUs, national agencies) need resources and capability building to increase their capacity to adapt to the effects of climate change.
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Uddin, Md Nagim, Tutul Kumar Saha, Myiesha Rayzil Hossain, SM Fakrul Islam, and Zakir Hossain. "Constraints to climate change adaptation and livelihood challenges: perspectives from the Sundarbans fishers' community in Bangladesh." Asian Journal of Medical and Biological Research 8, no. 2 (June 26, 2022): 103–14. http://dx.doi.org/10.3329/ajmbr.v8i2.60083.
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Fishers' are first-line observers of changes in the Sundarbans region and are among the first to be affected by the changes that occurred. In the Sundarbans fishers' communities, transformations of society have always been a part of life. In contrast, environmental changes were always interim and reversible, allowing them to understand and identify with the Sundarbans ecosystems as food and life providers. In this study, fishers' observations on climate change impacts and their livelihoods were compiled and analysed using a structured questionnaire in accordance with the tenets of grounded theory. The observations of fishers from the region of the Sundarbans demonstrated a rise in the frequency of extreme weather events caused by rising temperatures and changes in the weather pattern. Physical components such as rainfall, coastal erosion, sea-level rise, siltation alterations in fish species distribution ranges, and migratory spawning behaviours were also affected by changes in the region's weather and climate. As salinity levels rose, the diversity and productivity of river ecosystems were affected, particularly in the most vulnerable areas. As a result, river freshwater flow decreased over time. A high rate of siltation in rivers and river mouths was considered another major concern that led to seasonal flooding due to its low freshwater upstream flow rate. The Sundarbans region provides a vast array of resources for diversifying fishers' livelihoods, but climate change is diminishing these alternatives due to more frequent catastrophic events. Specifically, climate change limits the resilience of fishers' communities, restricting opportunities for diversification or forcing them to leave their homes or villages. Climate change generated an environment that was generally unfavourable for all fishing communities. In order to survive in an unfavourable environment, the social well-being of fishers (mostly women and children) was negatively impacted by a variety of challenges, including disease, lack of potable water, malnutrition, sanitary difficulties, lack of electricity, lack of food and clothing, lack of proper medical care, and so on. To evaluate the effects of climate change on fisheries in the study area, the biodiversity, abundance, and production of most freshwater species are drastically reduced due to the destruction of spawning grounds, a transition in the spawning season, and the obstruction of fish migration. The findings of this study show that the climate and livelihood conditions of fishers in the Sundarbans region have changed significantly over the past few decades. Regardless of GOs and NGOs taking the required steps, proper implementation of interdisciplinary adaptive policy and regular monitoring in the Sundarbans fisher's community in Bangladesh could effectively reduce climate change impacts and improve livelihood conditions. Asian J. Med. Biol. Res. 2022, 8 (2), 103-114
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Kabooro, Rehana Sindho. "Growing Ageing Population and European Policies." Magyar Gerontológia 13 (December 29, 2021): 27–28. http://dx.doi.org/10.47225/mg/13/kulonszam/10576.
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Introduction to Social change due to aged population
Increased elderly population in Europe has many factors, it took decades what is happening now. Europe’s low fertility rate, Europe’s migration from developing to developed country, high life expectancy and immigration laws. The developmental strategies of G20 countries are significantly interlinked with the economic and population development policies. The recognition of ageing population is followed by the Japan’s ageing population process which is also mentioned in most of the Eu data on comparison for the ageing population strategies. It is a visible change that social and economic developments causes higher life expectancy and better health in Europe.The average middle age is increasing, and it is predicted about 4.5 years by 2019 to 2050 it may reach 48.2 years as European middle age. In the most developed parts of the world, elderly population was discussed long ago, and serious steps were taken for global improvements for older people. As the life expectancy increases dependency increases that creates pressure to fulfil the needs of elderly for health, socially, and economically. Increasing number of elderly populations, is actual rise in social, cultural, and economic responsibilities for welfare systems, health care systems and individuals. More elderly people, more reliance needed number of old age homes, elderly rehabilitation centers and Palliative care centers are increased.
Population ageing is not a sudden change in population, but it took decades to consider about the population phenomenon. The European social change has major cause of ageing population that may has dark impact to the future perspective. In current situation birth rate is low, mortality rate is also low and life expectancy is high which is creating a lot pressure on the economic growth and to run the economic cycle the labour force is insufficient, health care systems are updating each year since COVID pandemic and system failure was visible in many OECD countries as well in such condition there is a lot more pressure on the women to balance birth ratio at the same time women is considered as “Sandwich Generation” by some of the European researchers, women cares for the both younger and the older generation nowadays.
Such ageing population determinants push the policy makers to design such policies and laws to combat this situation to secure future generations. Some of the EU policies to promote Active ageing and solidarity between generations, Silver Economy project to provide elderly jobs to decrease dependency ratio and Healthy ageing programs are running but still there is long way to show up positive results if migration policies will not be softened at certain points to keep achieving sustainable development goals in Europe.
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Li, Jianzhong, Jian Chen, Li Yuan, Ge Hu, and Jianhan Feng. "Flow Characteristics of a Rich-Quench-Lean Combustor-Combined Low-Emission and High-Temperature Rise Combustion." International Journal of Aerospace Engineering 2019 (February 11, 2019): 1–22. http://dx.doi.org/10.1155/2019/4014120.
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To determine the flow field structure and flow characteristics of a rich-quench-lean (RQL) combustor-combined low-emission and high-temperature rise combustion, a two-dimensional PIV technology was used to evaluate the effect of aerodynamic and structural parameters on the flow field and flow characteristics of the combustor. The variation in the total pressure loss of the combustor has little effect on the flow field structure of the combustor. However, the variation in the parameters of primary holes significantly affects the structure of the central recirculation zone, the distribution of local recirculation zones in the rich-burn zone and quenching zone, and the average residence time in the quenching zone. On the plane that passes through the center of the primary hole, the variations in the array mode and diameter of primary holes would form entrainment vortexes with different characteristics, thus affecting the position and flow state of local recirculation in the rich-burn zone and the local structure of the central recirculation zone. As the rotational direction of local recirculation coincides with that of the main air flow in the primary zone, the local center recirculation is intensified. In contrast, it is weakened. As the primary holes are located at half height (H/2) of the combustor, the residence time of air flow at the quenching zone can be shortened by 65% through using the staggered structure of primary holes and increasing the momentum of the partial single-hole jet. The quick-mixing process in the quenching zone is not beneficial to increase the number of primary holes and decrease the momentum of the single-hole jet.
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Amiri, Mohamadreza. "Evaluation of Serum Vitamin D Levels in Foster's Children Care Center." Journal of Pediatric Health and Nutrition 1, no. 2 (January 5, 2019): 1–8. http://dx.doi.org/10.14302/issn.2691-5014.jphn-18-2456.
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Vitamin D, the sunshine vitamin, is now recognized not only for its importance in promoting bone health in children and adults, but also for its other health benefits, including reducing the risk of chronic diseases such as autoimmune diseases, common cancer, and cardiovascular diseases. Ultraviolet radiation of the sun with wavelengths of 290-310 nm penetrates into the skin and converts 7-dehydrocholesterol to previtamin D3, which quickly transforms to vitamin D3. Vitamin D (D represents either D2 or D3) made in the skin or ingested through diet is biologically inert and requires two successive hydroxylations first in the liver on carbon 25 to form 25-hydroxyvitamin D 25(OH)D and then in the kidney for a hydroxylation on carbon 1 to form the biologically active form of vitamin D, 1,25-dihydroxyvitamin D (1,25(OH)2D) 1, 2, 14, 19. The concentration of the produced 25-hydroxy vitamin D in blood circulation is 1,000 times more than 1,25-dihydroxy vitamin D 4, and it is regarded as a standard indicator of vitamin D status in humans 3. 25-hydroxy vitamin D half-life is about 2-3 weeks and it is regulated by calcium (Ca), phosphorus (P), and serum parathyroid hormone (PTH) to some extent. 25-hydroxy vitamin D content also reflects the amount of vitamin D produced in the skin after exposure to sunlight or received through food intake 5, 6. Guidelines for vitamin D insufficiency/deficiency defined by serum 25(OH)D concentrations have been published from many countries and regions all over the world 7, 8, 9, 10, 11. Vitamin D deficiency is a pandemic problem. According to global estimations, more than one billion people around the world suffer from vitamin D deficiency. Among Iranian population, the incidence of vitamin D deficiency varies from 2.5 to 98.5% based on geographic area 12, 13. Various factors may give rise to vitamin D deficiency, including skin pigments, low levels of vitamin D in diet (insufficient fish oil and egg yolk intake), malnutrition, genetic factors, exclusive breast feeding, vitamin D deficiency of mother during pregnancy, prematurity, chronic use of drugs (e.g., anticonvulsants, aluminum-containing anti-acids, rifampcin, isoniazid, antifungal drugs, antiviral drugs, and glucocorticoids), winter and obesity 1, 13. Cultural habits, the need for full body coverage during outdoor activities and the lack of sunlight programs are the risk factors for low vitamin D levels in women 15, 16, 17. Children enter foster care due to early childhood adverse experiences such as poor prenatal and infant health care, food insecurity, chronic stress, and the effects of abuse and neglect. As a result, they are at higher risk for poor physical, psychological, neuroendocrine and neurocognitive outcomes compared to others. Foster children are at risk for growth and nutritional deficiencies due to their poor nutritional environment prior to placement in foster care. Insufficient caloric intake results in growth deficiencies. Evidence showed that the risk of stunting and underweight is high in this population 18. The risk of developing hypovitaminosis D was significantly higher in children living in foster homes. One reason is that they are at higher risk of child abuse, emotional deprivation and physical neglect than children living with their families. Moreover, these children most likely do not spend much time outdoors and they lack adequate sun exposure. Another reason is that as children grow up in institutional care, they shift from a diet of vitamin D–fortified formula milk to cooked food, which may not be fortified with vitamin D 1. Iranian government has made some efforts to apply efficient interventions to reduce the prevalence of vitamin D deficiency, and the country’s healthcare system should be managed through accurate planning. Yet, in this country, studies on vitamin D deficiency in children living in foster homes are very limited, and given that timely diagnosis and treatment of this deficiency is vital, this research is conducted in Ali Asghar foster home in Mashhad, Iran.
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Tennant, Ryan, Sana Allana, Kate Mercer, and Catherine M. Burns. "Exploring the Experiences of Family Caregivers of Children With Special Health Care Needs to Inform the Design of Digital Health Systems: Formative Qualitative Study." JMIR Formative Research 6, no. 1 (January 5, 2022): e28895. http://dx.doi.org/10.2196/28895.
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Background Family caregivers of children with special health care needs (CSHCN) are responsible for managing and communicating information regarding their child’s health in their homes. Although family caregivers currently capture information through nondigital methods, digital health care applications are a promising solution for supporting the standardization of information management in complex home care across their child’s health care team. However, family caregivers continue to use paper-based methods where the adoption of digital health care tools is low. With the rise in home care for children with complex health care needs, it is important to understand the caregiving work domain to inform the design of technologies that support child safety in the home. Objective The aim of this study is to explore how family caregivers navigate information management and communication in complex home care for CSHCN. Methods This research is part of a broader study to explore caregivers’ perspectives on integrating and designing digital health care tools for complex home care. The broader study included interviews and surveys about designing a voice user interface to support home care. This formative study explored semistructured interview data with family caregivers of CSHCN about their home care situations. Inductive thematic analysis was used to analyze the information management and communication processes. Results We collected data from 7 family caregivers in North America and identified 5 themes. First, family caregivers were continuously learning to provide care. They were also updating the caregiver team on their child’s status and teaching caregivers about their care situation. As caregiving teams grew, they found themselves working on communicating with their children’s educators. Beyond the scope of managing their child’s health information, family caregivers also navigated bureaucratic processes for their child’s home care. Conclusions Family caregivers’ experiences of caring for CSHCN differ contextually and evolve as their child’s condition changes and they grow toward adulthood. Family caregivers recorded information using paper-based tools, which did not sufficiently support information management. They also experienced significant pressure in summarizing information and coordinating 2-way communication about the details of their child’s health with caregivers. The design of digital health care systems and tools for complex home care may improve care coordination if they provide an intuitive method for information interaction and significant utility by delivering situation-specific insights and adapting to unique and dynamic home care environments. Although these findings provide a foundational understanding, there is an opportunity for further research to generalize the findings.