Roof Of House Research Articles

Mapping the distribution of tuberculosis cases and associated factors identified through routine program implementation and community-based active screening in Central Ethiopia.

Smear-positive TB patients greatly contribute to community-level transmission of this disease. Locating hotspots would make it easier to prioritize and target control interventions. This study aimed to assess the spatial distribution of smear-positive index TB cases and their secondary cases and the predictors of clustering of smear-positive TB cases. This study was conducted in the Silti Zone of Central Ethiopia from 2020 to 2022. The data of smear-positive index TB patients were collected from the unit TB registries of healthcare facilities. Contacts of all index TB patients were screened in the community and tested to identify secondary TB patients. We performed spatial analysis, including Moran's I statistic, the Getis-Ord Gi* statistic and geographically weighted regression (GWR), to assess the global distribution, local clustering and predictors of clustering of smear-positive TB patients, respectively. Additionally, we used inverse distance weighting (IDW) interpolation to predict the distribution of smear-positive TB cases and develop a continuous raster map for places with no data. Spatial autocorrelation analysis revealed that the distribution of smear-positive TB patients exhibited significant clustering (Moran's I = 0.70029; p value < 0.000). The Getis-Ord Gi* output indicated the presence of statistically significant hotspots as well as cold spots in the study area. Significant hotspots were found in 11 Kebeles of the Silti, Dalocha and Misrak Silti districts. Significant coldspots were also found in five kebeles of the Silti and Misrak districts. GWR analysis revealed that no education, primary education, family size and thatched roof houses were significant predictors of the spatial clustering of smear-positive TB cases. We also found that the majority of the secondary TB cases were found in hotspots identified through spatial analysis. The study revealed a heterogenous distribution of smear positive TB in the study area and it could act as a model that can be replicated in other regions. The identified hotspots of TB could be targeted through location-based interventions such as systematic active screening in the form of outreach programs to improve the performance of TB prevention and control, including reducing the transmission of TB. Educational status, family size and housing type were some of the factors that significantly influenced the spatial distribution of smear-positive TB in the study area. The distribution of secondary TB cases found through household contact screening coincided with the identified hotspots, indicating greater transmission of the disease in these places.

Operation, Expansion, and Improvement of the Snow Load Alert System “YukioroSignal”

The “YukioroSignal” system, which provides snow load alerts, was developed to inform decision-making regarding snow removal from house roofs. It was launched in Niigata Prefecture in 2018 and expanded to cover all special heavy snowfall areas in Japan, including the Hokkaido, Tohoku, and Hokuriku regions in 2024. The system uses the SNOWPACK model to estimate high-accuracy snow weight from real-time snow depth data published online at observation points. At locations where snow depth gauges are not installed, such as in mountainous areas, snow weight is estimated using inverse distance-weighted interpolation, but accuracy is reduced. To overcome this problem, this study attempted to integrate this information with the snow water equivalent distribution calculated using the simple-layer snow distribution model. To validate this improvement, manual observations of snow weight were performed at 98 sites and compared with simulation results. The accuracy of snow weight estimation at distances far away from snow depth stations was improved. The six-year operation of YukioroSignal showed the additional required information that is vulnerable to damage even with less snowfall, such as vacant houses, and caution of changes in hazard levels by an increase in snowburst in a short period.

Drainage Characteristics, Capillary Barrier Effect, and Diversion Length of Flat Earthen Roof of Historical Kemaliye Houses

ABSTRACT Kemaliye houses stand out as remarkable examples of Anatolian architecture, renowned for their distinct mixed construction method and the utilization of diverse and sustainable materials. The flat earthen roof, constructed using local soils and traditional techniques, adds to the unique character of these houses. However, due to the need for roof maintenance, particularly in winter, residents have adopted modern roofing methods. In order to preserve the architectural integrity of historic houses, research into the mechanisms and performance of flat earthen roofs using local materials and original construction techniques is essential. To achieve this objective, original materials, and construction techniques were investigated with 1D infiltration laboratory tests and analyzed using numerical modelling. The results indicated the existence of a capillary barrier effect on the roofs. Additionally, water balance and diversion length of the roof is obtained through experimental study and numerical analysis. Furthermore, numerical analyses indicated that the capillary barrier effect may be reduced or weakened as a result of frost heave and the formation of desiccation cracks. Understanding these phenomena is a vital step in developing effective solutions for preserving and maintaining roofs in their original architectural form.

Investigation on fixed pitch Darrieus vertical axis wind turbine

Small-scale Darrieus wind turbines have a wide scope in areas that are isolated from the power grid for such small-scale household applications. Applications of wind turbines on house roofs are one potential way to generate electricity from wind energy harvesting in low-wind urban locations. This work studies the aerodynamic behavior of a vertical axis wind turbine based on a MATLAB programming mathematical model. The NACA0021 airfoil profile blade was used in this present research investigation. The turbine was fabricated with dimensions such as chord length, c = 95 mm, blade height, h = 600 mm, and turbine diameter, D = 600 mm. The experimental results of the turbine for air velocity from 1 to 12 ms−1 were used in this paper and compared with analytical results. It has been observed that the fixed-pitch turbine does not start by itself at a low air velocity of 1 to 5 m/s due to a minimum and negative torque.

Artificial Rainfall Aquifer to Supply Clean Water Requirement During the Dry Season in Selengen Village, North Lombok Regency

Selengen Village is one of the villages in North Lombok Regency that always experiences drought and lack of clean water every year. The problem of clean water availability is caused by limited water sources on the surface. The frequency of rainwater in Selengen Village is very small and with very low intensity. In order to meet the need for clean water, the community has to pay additional costs to buy clean water or wait for a drop from the government. The Selengan Village community has limited information regarding simple methods that can be used to collect clean water sourced from rainwater. The method used to introduce rainwater capture as a source of clean water is to provide direct outreach to the Selengen Village community about rainwater storage in the form of ABSAH (Artificial Aquifer for Rainwater Savings). The ABSAH method can be done individually or in groups. The socialization was carried out at the Panggung Barat Hamlet office involving the community consisting of farmer groups, community leaders, youth organizations and housewives. The result of the socialization regarding the introduction of artificial rainwater aquifers is the high desire of the community to create rainwater storage, either independently/individually or in groups. In the process of making it, the community hopes to get assistance from the implementation team so that the calculation of the storage volume is in accordance with the volume of water used. Apart from that, the community also hopes to be given drawings of storage designs, installations for collecting water from the roofs of houses and designs of distribution networks to people's homes.

Notes on the Nesting Behavior of Four Solitary Wasps (Insecta: Hymenoptera) in India

India is one of countries that has the highest biodiversity level of Hymenoptera in the Oriental region, as well as in the world. Hence, studies of its biology have received a large consideration of entomologists. In a course of study on Hymenoptera in Odisha state of the country in 2015, we observed the nesting behavior of several wasps and recorded their new nesting sites. Therefore, this study presents notes on the nesting behavior of the four Indian wasps, namely, Chalybion bengalense (Dahlbom) (Sphecidae), Trypoxylon petiolatum F. Smith (Crabronidae), Delta esuriens (Fabricius) and Xenorhynchium nitidulum (Fabricius) (both, Vespidae: Eumeninae). The first two wasps used man-made holes on the walls of a big temple for their nesting sites, fully stored paralyzed spiders in the nest cells for offspring and plugged them with mud, in a case of Chalybion bengalense, females added a white layer of unknown material on the outside surface of covers. Delta esuriens chose its nesting site beneath the thatched roof of a human house, built a linear series of pot-shaped mud cells that were firmly attached to some rice blades hung loosely beneath the roof and provisioned caterpillars in these nest cells. The latter built a mud nest on a wall of a human house. Xenorhynchium nitidulum made a nest cell oblique a 30° angle from the vertical surface of the wall, plastered the outside surface of the cell with tree resin of a certain plant species after completion of building and then stored prey of an unknown caterpillar in the cell. The female of Xenorhynchium nitidulum sit in the nest cell after provisioning of the first prey to the following morning suggesting that the wasp progressively provisions its nest and the egg is laid prior to provisioning.

Unintentional injuries and falls in populations in Russia. The Ural eye and medical study and the Ural very old study

BackgroundTo explore the prevalence of self-reported unintentional injuries and falls (UIFs) in medium-aged and old populations in Russia and factors associated with them. MethodsTwo population-based studies (Ural Eye and Medical Study (UEMS), Ural Very Old Study (UVOS)) were carried out urban and rural areas in Bashkortostan/Russia. They consisted of 5899 individuals (age: 40+ years) and 1526 participants (age: 85+ years), respectively. We assessed previous falls as part of an interview with standardized questions, conducted in the framework of a series medical and ophthalmological assessments. ResultsIn the UEMS with 5894 individuals (age:59.0 ± 10.7 years), UIF prevalence was 1101/5894 (18.7 %; 95 % confidence interval (CI)CI:17.7,19.7), with 1,2,3,4,5,6,7,8,9, or 10+ UIFs reported by 766 (69.6 %),146 (13.3 %),56 (1.4 %),15 (1.4 %),19 (1.7 %),3 (0.3 %),2 (0.2 %),1 (0.01 %), and 10 (0.9 %) participants, respectively. The UIFs had occurred as outdoor incidents (n = 594; 53.8 %), at home (n = 162; 14.7 %), on the road or traffic accidents (n = 109; 9.9 %), at work (n = 77; 7.0 %), during garden work (n = 24; 2.2 %) or as falls from a higher level (n = 17; 1.5 %) or from house roofs (n = 16; 1.4 %). In 100 (1.7 % of the total study population; 9.1 % of the group with UIFs) participants, low vision was reported as a major cause for the UIF. Higher UIF prevalence was associated (multivariable analysis) with older age (odds ratio (OR):1.01; 95%CI:1.005,1.02;P < 0.001), urban region of habitation (OR:1.59; 95%CI:1.37,1.85;P = 0.001), higher smoking package number (OR:1.01; 95%CI:1.004,1.01;P = 0.001), longer waist circumference (OR:1.01; 95%CI:1.002,1.01;P = 0.008), higher prevalence of a history of arthritis (OR:1.38; 95%CI:1.18,1.62;P < 0.001) and backache (OR:1.73; 95%CI:1.49,2.02;P < 0.001), and higher depression score (OR:1.05; 95%CI:1.03,1.07;P < 0.001). Out of 1525 UVOS participants (age:88.8 ± 2.9 years; range:85–103.1 years), the UIF prevalence was 780/1525 (51.1 %; 95%CI: 48.6, 53.6), with 390 (50.0 %), 116 (14.8 %), 49 (6.3 %), 12 (1.5 %), 8 (1.0 %), 2 (0.3 %), 4 (0.5 %), 1 (0.1 %), and 15 (1.9 %) participants reported about 1,2,3,4,5,6,7,8,9,or 10+ UIFs, respectively. The UIFs had occurred as outdoor incidents (n = 386; 25.3 %), at home (n = 214; 14.0 %), on the road or traffic accidents (n = 22; 1.4 %), at work (n = 21; 1.4 %), during garden work (n = 10; 0.7 %) or as falls from a higher level (n = 11; 0.7 %) or from house roofs (n = 1; 0.1 %). A higher UIC prevalence correlated with female sex (OR:1.65; 95%CI:1.30,2.09;P < 0.001) and Russian ethnicity (OR:1.26; 95%CI:1.02,1.56;P = 0.03). ConclusionsUIFs have occurred to a substantial part of the adult and very old population in Russia.

THE INFLUENCE OF TILT ANGLE ON THE DAILY PROFILE TOTAL ENERGY OF PHOTOVOLTAIC POLYCRYSTAL

This preliminary study aims to determine the daily profile of the power output generated from solar panels, with variations in the house’s roof angles of 15º, 0º, 15º. Tilt angle investigation expects to discover the impact of placing solar panels on the slope of the tile used on the house’s roof. The collecting data of this study was investigated the data of current and voltage every hour that produced by solar panel. Besides, this study also comparing the result of total energy output value for daily profile of solar panel during ten hour per day (start from 7 am to 5 pm). The results show that solar panels with an angle of -15º at 07:00 – 10:00 WIB have higher output voltage and current than other angle variations. At a tilt angle of 0º, the output voltage and current of the solar panel are higher at 11:00-14:00 WIB, while at a tilt angle of 15º in the afternoon. Based on observations, each solar panel with exposure for 10 hours obtained the total energy value for polycrystalline solar panels with a tilt angle of -15º of 258.44 Wh, solar panels with an angle of 0º obtained an energy value of 263.64 Wh, and a tilt angle of 15º obtained energy values 260.69 Wh. The photonic energy emitted for 10 hours is 2097.47 Wh. The energy efficiency value for each polycrystalline solar panel is 12.32% for the angle of -15º, the angle of 0º is 12.57%, and 12.43% for the angle of 15º. In conclusion, variations in the angle of the solar panels have significant effect on the voltage, current, and energy generated from polycrystalline solar panels in every hour. However, based on the data result the total energy exposure and the efficiency value for each variation angle has no significant different. Pyramid-shaped house roof construction has the advantage of increasing the value of the cross-sectional area of the tile, which has the opportunity to install wider-sized solar panels so that a greater value of electrical energy is obtained.

Simulating a Massive Shift towards Photovoltaics without Implying Land Consumption: A Stepwise Approach for Regional Decision Making

As part of the transition to renewable energy production, the use of photovoltaics is not sustainable per se. Planning can guide PV development while minimising possible negative impacts on society, the economy, and the environment. To date, however, the lack of adequate tools and information at the local level and the lack of integrated planning in the design of energy initiatives are key challenges. This paper aims to support a sustainable energy transition at the regional level and proposes a methodology to (i) determine the area required to achieve transition goals through PV; (ii) evaluate possible alternative surface categories for PV installation without consuming additional land. Through the illustrative case study of the Veneto Region, electricity demand is calculated based on consumption data, and the area needed to cover this demand through PV is calculated. Areas available for PV installation were mapped, classified (e.g., roofs of houses, parking lots, school buildings, …), and quantified through GIS. The results show that the available areas correspond to 11 times those needed to achieve the goals. This work provides a methodology to support regional decision makers to take a concrete step toward sustainable transition policies. This methodology can be replicated for other regional contexts.

When ice and sea are not barriers for flies: First report of Trichocera maculipennis (Diptera) in South America

Abstract During the 2022/2023 austral winter, large swarms of Trichocera (Saltrichocera) maculipennis Meigen, 1818 (Diptera: Trichoceridae), were observed around house roofs in Puerto Williams (Navarino Island, southern Chile, 54° S). In January 2023, the presence of this species was also confirmed in Punta Arenas (53° S), with specimens collected within the Chilean Antarctic Institute warehouse facilities. Trichocera maculipennis is native to the Holarctic region and became established on King George Island (South Shetland Islands, Maritime Antarctic) over 15 years ago. However, the species has not previously been reported from South America. Taxonomic and molecular identification techniques were used to confirm the identity of the new specimens obtained from Navarino Island and Punta Arenas. Preliminary observations of the fly's habitat preferences and swarming behaviour in Puerto Williams are provided, as well as comparisons in wing morphometrics between flies from Puerto Williams and King George Island. The fly's extensive distribution and high abundance in Puerto Williams are consistent with human‐facilitated introduction and several years' establishment. These findings emphasise the importance of implementing robust management strategies and biosecurity measures, particularly during transportation between logistical hubs in southern South America and the remote areas of the Cape Horn Biosphere Reserve and Antarctica.

200 years of solar electricity

Two hundred years after Edmond Becquerel discovered the photovoltaic effect, solar panels have become an everyday technology, to be found on the roofs of houses or alongside railway lines. However, this apparent familiarity conceals the rapid and on going development of the industry: the panels installed today are very different from those installed just a few years ago, in terms of design, cost and the challenges to be met. Photovoltaics has now established itself as a key player in the global energy landscape, and its dynamism means that we need to keep a close eye on developments. The purpose of this article is to take stock of the current state of the industry, presenting typical orders of magnitude, the dynamics of the sector and future prospects. It can be supplemented by questions and answers prepared by researchers in the field and available at https://solairepv.fr/.

Investigation into the Long-Term Stability of Carnallite Pillars Considering Creep Influence

Abstract In subterranean potash mines utilizing the room-and-pillar mining method, maintaining the long-term stability of carnallite pillars is imperative for the safety and ongoing viability of operations. This study undertakes uniaxial compression creep tests on carnallite samples sourced from the Dongtai Potash and Magnesium Salt Mine in Laos. The durability of carnallite pillars is evaluated using an advanced Burgers creep model combined with Flac3D numerical simulations. Results indicate that the creep strength of carnallite is approximately 60%–70% of its immediate strength, demonstrating significant creep behavior. The refined Burgers model provides an accurate representation of the carnallite’s creep characteristics. Post-excavation, the internal compressive stress within the pillars progressively increases, registering an approximate rise of 1 MPa, and stabilizes under pressure after one year. After three years of continuous observation through creep tests and Flac3D simulations, the maximum deformations detected in the roof and floor of the mining house, as well as the adjacent rock masses, were 60mm and 20mm, respectively, indicating minimal overall deformation. The width of the plastic zone within the pillars exhibits time-dependent growth, with rapid expansion occurring in the internal plastic zone and a significant deformation rate within the first six months post-excavation. To ensure the long-term stability of the mining pillars and voids, it is recommended that backfilling operations be conducted within six months following the excavation.

Graph Transformer GANs With Graph Masked Modeling for Architectural Layout Generation.

We present a novel graph Transformer generative adversarial network (GTGAN) to learn effective graph node relations in an end-to-end fashion for challenging graph-constrained architectural layout generation tasks. The proposed graph-Transformer-based generator includes a novel graph Transformer encoder that combines graph convolutions and self-attentions in a Transformer to model both local and global interactions across connected and non-connected graph nodes. Specifically, the proposed connected node attention (CNA) and non-connected node attention (NNA) aim to capture the global relations across connected nodes and non-connected nodes in the input graph, respectively. The proposed graph modeling block (GMB) aims to exploit local vertex interactions based on a house layout topology. Moreover, we propose a new node classification-based discriminator to preserve the high-level semantic and discriminative node features for different house components. To maintain the relative spatial relationships between ground truth and predicted graphs, we also propose a novel graph-based cycle-consistency loss. Finally, we propose a novel self-guided pre-training method for graph representation learning. This approach involves simultaneous masking of nodes and edges at an elevated mask ratio (i.e., 40%) and their subsequent reconstruction using an asymmetric graph-centric autoencoder architecture. This method markedly improves the model's learning proficiency and expediency. Experiments on three challenging graph-constrained architectural layout generation tasks (i.e., house layout generation, house roof generation, and building layout generation) with three public datasets demonstrate the effectiveness of the proposed method in terms of objective quantitative scores and subjective visual realism. New state-of-the-art results are established by large margins on these three tasks.

Pemanfaatan Ekosistem Mangrove dan Perubahan Lingkungan Pesisir Pulau Bawean, 1886–1923

The purpose of this article is to discuss the history of mangrove ecosystem utilization and physical changes on the coast of Bawean Island during 1886 – 1923. This article used the historical method which consists of heuristic, criticism, interpretation, and historiography. Image classification and maps comparation applied as proponent system in this study to analysis coastal change. The first step is analysis data showing the activities of Bawean residents in utilizing the mangrove ecosystem. The second is analysis through image classification and map comparation to analyze historical changes. Based on this analysis, it can be seen that residents use the mangrove ecosystem for daily needs such as foundations and house roofs. Residents have also converted the function of the mangrove ecosystem into residential areas and agricultural land. Therefore, the activity of residents in coastal area as well as use of mangrove ecosystem plays a role in changing the coastal environment of Bawean Island.

Multi objective optimization for house roof using artificial neural network model

Roof models with low heat loss and low heating costs for buildings are crucial for reducing energy consumption and greenhouse gas emissions in cold regions. This study aimed to calculate the heat loss for various roof models with low heat loss, which are widely used in houses in Europe and other cold regions. We created 324 models for three types of roofs (light, medium, and heavy) with different materials and thicknesses using the HAP program. We then trained a neural network (ANN) to generate a mathematical function that can be used to calculate the optimal surface using a multi-objective genetic algorithm method. The resulting optimal roof design was simulated using the Ansys program on a January day. We compared the heat loss results for the optimal roof for HAP, ANN, and transient thermal analysis by Ansys, respectively, showing a close agreement among the methods.

ZAKAT FUND MANAGEMENT STRATEGY FOR MUSTAHIK WELFARE MAQASHID SHARIA PERSPECTIVE

The purpose of this study is to explain the Management Strategy of Zakat Funds towards Mustahik in the Perspective of Maqashid Sharia Case Study at Baznas Samarinda City Prov. East Kalimantan. With the formulation of the problem: 1. What are the indicators used to identify Mustahik Faqir and Poor Groups who are entitled to receive Zakat funds? 2. How is the impact of acceptance and Zakat on Mustahik from the Faqir and Poor groups in the Maqashid Sharia perspective? This research is qualitatively descriptive with a sociological approach, data collection methods are observations, interviews and documentation at Baznas Samarinda City. Data analysis techniques are reducing data, presenting data, and drawing conclusions. The results showed that the Management Strategy of Zakat Funds Towards Mustahik in the Perspective of the Maqashid Sharia Case Study at Baznas Samarinda Prov. East Kalimantan. namely, the program is channelled into 5 programs: Samarinda Smart, Samarinda Healthy, Samarinda Empowered, Samarinda Berdakwah, and Samarinda Care by covering the fields of Economy, Health, Education, Da'wah, and Humanity. Indicators of zakat recipients used to determine the mustahik zakat categories of poor and poor, namely: a. Home/residence ownership index by looking at the condition of the house (roof, floor, walls), whether the family owns a house or not, the source of residential lighting. b. Ownership of assets including assets owned by families or individuals, local transportation owned, and facilities in accessing news/information. c. Income by looking at sources of income not exceeding 1,000,0000 and not having savings / high-value goods. The impact of the distribution of zakat funds on the welfare of mustahiq from the poor and poor groups in the maqashid sharia perspective is that the distribution of zakat funds is carried out in the form of consumptive zakat fund assistance, with this mustahiq program can increase their income which the percentage level of success is 80 per cent (%) as evidenced by surveys by Baznas Samarinda and information reports from the results of mustahiq businesses that experience profits and can meet their basic needs. Mustahiq has been able to independently change the status of mustahik to munfiq or muzakki through business capital assistance and business equipment assistance that has been provided by Bazas Samarinda City.

Adaptation and local knowledge of the Marind Anim Tribes in the utilization of Paperbark trees (Melaleuca leucadendron) in Merauke, South Papua, Indonesia

Abstract. Suharno, Kadir A. 2023. Adaptation and local knowledge of the Marind Anim Tribes in the utilization of Paperbark trees (Melaleuca leucadendron) in Merauke, South Papua, Indonesia. Biodiversitas 24: 6323-6331. Papuan rainforests are one of the most immensely diverse in the world. Such rich biodiversity provides a source of livelihood for the inland communities in Merauke, South Papua Province. For example, Paperbark trees (Melaleuca leucadendron) or kayu bus in the local language, which grow dominantly in lowland areas, are essential for the lives of the local inhabitants, the Marind Anim tribe. This research aims to elaborate on the use of Paperbark trees (M. leucadendron) by the Marind Anim tribe in their daily lives. Data were collected from surveys, interviews, and field observations. The interviews were conducted in multiple locations: Merauke, Sota, Muting, Semangga, and Tanah Miring. The results show that all members of the Marind Anim tribe (100%) depend on Paperbark for their livelihood, especially for the need for housing. The community has been using Paperbark trunks for house frames (92.31%), either unprocessed or in the forms of wooden blocks (5 x 5, 5 x 10, 10 x 10 cm) and boards (2 x 20 cm). They also utilize the wood for firewood. Other tribe members, i.e., the residents of the Wasur National Park, extract essential oils from Paperbark leaves. This utilization receives assistance and support from the area manager of the national park. Other than that, the community also utilizes the bark for house roofs, mats for crops, and firewood. In brief, the community's dependence on Paperbark trees is high because, other than being versatile, they are endemic to the lowland areas of Merauke, dominating other tree species. The findings suggest the importance of establishing a sound management system for the utilization of Paperbark trees to maintain sustainability in meeting the needs of surrounding communities.

Field acoustical measurements for sound insulation residences against aircraft noise

In this paper, we have investigated measurement methods of the sound insulation performance for residences treated with increased sound insulation near airports in Japan. The flyover measurement method and the loudspeaker measurement method are conducted to verify the performance. The first one provides the performance of the whole facades of a house using aircraft noise, approximately similar to the FAA method described in ASTM E966. The pressure level outdoors is measured at enough high position to ignore the interference with sound from the ground or the house roof. However, the microphone is sometimes put on the roof surface because of being in the house's shadow in the overcrowded residential area. Thus, we have investigated the sound pressure level difference between the high and surface positions using simple numerical analysis and field measurement. On the other hand, the outdoor and indoor loudspeaker methods are conducted for facade elements such as windows and doors, according to JIS A 1520. The sound insulation performance for facade walls is also measured with ISO 16283-3; however, the loudspeaker sometimes cannot be positioned far enough from the wall. Thus, we have proposed the measuring method for the facade wall by applying the indoor loudspeaker method.

Assessing the Potential of Qatari House Roofs for Solar Panel Installations: A Feasibility Survey

Qatar’s ambitious Vision 2030 includes a major shift towards clean energy, and residential solar PV installation can be an obvious option, given its abundant sunlight and high power for residential cooling. Despite significant solar panel farm investment, there has been limited progress in deploying solar panels on home roofs, and further research is needed to identify the potential for such an initiative and its impact on the country’s move towards clean energy. This field survey assesses the potential for residential rooftop solar panel installation across Qatar, considering space availability, currently utilized space, remaining space, shading, and roof type. It also provided indications of potential obstacles and shading that might affect panel sunlight exposure. The results showed that there is significant potential for installing solar panels on Qatari homes, which could contribute to a considerable portion of the energy consumed by households during peak usage periods, particularly in the summer months. Moreover, excess energy generated could be exported to other countries with high demand during periods of low demand in Qatar. The study’s findings complement previous research efforts and provide insights for policymakers and stakeholders to develop strategies that endorse the vision for 2030 and promote the transition towards clean energy in Qatar.

EVALUASI KUALITAS BIBIT PALA (Myristica fragrans Hout) DI DESA RUMAHKAY KECAMATAN AMALATU KABUPATEN SERAM BAGIAN BARAT

Nutmeg (Myristica fragrans Hout) is a plantation crop that has high economic value. Good growth of nutmeg must be started from using good seeds and to get good seeds, the seeding technique must use good quality seeds and good shade. The people of Rumahkay Village use different shelters for seeding nutmeg seedlings, for this reason it is necessary to evaluate which type of shade is better. The purpose of this study was to determine the effect of the type of shade on the growth of nutmeg seedlings, to determine which type of shade is the best. This research was carried out from August 2022 to September 2022 in Rumahkay Village, Amalatu District, West Seram Regency. This experiment was a completely randomized design (CRD) consisting of 8 levels of shade treatment (N0=no shade; N1=zeng; N2= plastic; N3= paranet; N4=roof house; N5= sago leaves; N6= mosquito net and N7= banner) which was repeated 4 times. Parameters measured were plant height, stem diameter, number of leaves and total leaf area. The results of the analysis show that the type of shade treatment has a significant and not significant effect on all observation parameters. The results of the Fisher LSD 95% test showed that the shade type N3 (70% paranet) produced the best nutmeg seeds compared to other types of shade.&#x0D;