The use of sorption and excess sorption isotherm in the mathematical modeling of the unsteady-state heat and humidity regime of the building envelope

In the given article the development of the moisture transfer equation based on the theory of moisture potential is considered. The task of combined heat and moisture transfer is one of the most complicated tasks in the building thermal physics field. The classical equations of moisture transfer by K.F. Fokin representing the transfer of moisture under the action of partial transfer potentials - the gradient of the partial pressure of water vapor and the gradient of humidity F - are listed. The possibility of uniform accounting of the combined water vapor transfer on the basis of the moisture potential F is described. The sorption isotherm for aerated concrete is constructed in accordance with the experiment carried out in a desiccator with an aqueous solution of sulfuric acid. A new equation of moisture transfer which takes into account moistening with vaporous moisture in the sorption zone of moisture and liquid moisture in the excess sorption zone of moisture is derived. In order to simplify the work with the obtained equation a new value of the relative potential capacity is introduced. A graph construction of sorption and excess sorption isotherms which are obtained using an analytical expression for the relative potential capacity is proposed. In the sorption zone of humidification the sorption and excess sorption isotherms coincide with the classical sorption isotherm. Meanwhile, in the excess sorption zone of humidification the sorption and excess sorption isotherms depend on temperature.

Perceptions of participation and the role of gender for the engagement in solar energy communities in Sweden

Background Energy communities are emphasized by the EU as important for developing sustainable energy systems that include and engage many people. While many renewables are highly compatible with a more decentralized energy system, research indicates that participation in ‘desirable’ energy activities and energy decision-making is influenced by social and economic factors, including gender, economic status and home ownership. The overall aim of this article is to contribute to this line of inquiry by exploring how and under which conditions energy communities allow for broader participation in the energy system. This article examines how gender, as a more specific condition, influences the extent to which parties can or cannot engage with collective solar ownership models by means of a qualitative study of 11 solar energy communities and one housing association in Sweden. Results The study revealed that despite the relative potential for inclusion that they hold, energy communities can raise justice concerns in terms of inequities concerning access, capacity, and opportunity to engage in decision-making. Conclusions While solely focusing on gender offers a limited view of the dynamics of inclusion and exclusion in renewable energy projects, it is our position that integrating it into the analysis will provide insights into possible measures to remedy limitations and accelerate the renewable energy transition.

Composition of Two Local Cassava Varieties and the Effect of Processing on their Hydrocyanic Acid Content and Nutrient Digestibility by the Rat

Two common Nigerian cassava varieties Were subjected to proximate analysis with a view to assessing the relative potential nutrient composition of the roots, stems, leaves and seeds. The results obtained showed that the leaves, seeds and stems in that order are much richer than the roots in protein but higher in crude fibre. There was a relationship between the crude protein contents of the roots and stem and the hydrocyanic acid (HCN) content of the plant while that of the leaves and seeds did not appear to follow the same trend. HCN of the bitter cassava variety was considerably higher in the whole tuber, pulp and peel than in the sweet strain, sundrying and ensiling resulted in appreciable losses of HCN. Grated root lost about half its HCN content within six hours while stored whole roots showed a rapid decline in HCN from the fifth day after harvest. Apparent digestibility coefficients (A.D.C.) of the major nutrients of cassava roots were not significantly (P <0.05) affected by the processes of boiling or sundrying.

Comprehensive or Comprehensible Experience? A Case Study of Religion and Traumatic Bereavement

The first half of this article provides a brief overview of two respective projects concerning traumatic bereavement, in which religious faith appeared to feature amid a constellation of significant coping and sense-making mechanisms for survivors. After presenting some illustrative examples of the kind of data produced in the course of our research, the second half of the article develops a retrospectively critical appraisal of our data collection and corresponding analysis practices. In questioning the extent to which our accounts of our participants’ accounts can be considered adequate representations of social order, we critically explore the relative potential of ‘reflexivity’ for bridging the experiential gap between researchers and participants. Taken together, these reflections prompt a return to the salutary question: what counts as sociologically ‘see-able’?

Emission Reduction Potential of Different Types of Finnish Buildings through Energy Retrofits

Energy retrofitting of buildings shows great potential in reducing CO2 emissions. However, most retrofitting studies only focus on a single building type. This paper shows the relative potential in six Finnish building types, to identify possible focus areas for future retrofits in Finland. Data from previous optimization studies was used to provide optimal cases for comparison. Energy demand of the buildings was generated through dynamic simulation with the IDA-ICE software. The cases were compared according to emissions reduction, investment and life cycle cost. It was found that, in all buildings, it was possible to reduce emissions cost-neutrally by 20% to 70% in buildings with district heating and by 70% to 95% using heat pumps. Single-family homes with oil or wood boilers switching to heat pumps had the greatest emission reduction potential. More stringent requirements for energy efficiency could be mandated during building renovation.

KOLONI BURUNG CANGAK ABU (Ardea cinerea LINNAEUS) DI AREA BANDAR UDARA INTERNASIONAL ADISUTJIPTO YOGYAKARTA (Grey Heron Colony (Ardea cinerea Linnaeus) in Yogyakarta Adisutjipto International Airport Area)

AbstrakBird strike merupakan peristiwa tabrakan antara burung baik secara berkelompok maupun tunggal dengan pesawat terbang pada proses penerbangan. Kejadian bird strike dapat menyebabkan kecelakaan ringan hingga serius yang sangat merugikan secara ekonomi Sekalipun telah dilakukan bird control secara maksimal berdasarkan panduan yang tersedia, namun bird strike juga terkadang masih terjadi di Bandar Udara Internasional Adisutjipto Yogyakarta (JOG) dengan tingkat kerusakan pesawat dari berat sampai ringan. Salah satu jenis burung penyebab kejadian bird strike di kawasan ini adalah cangak abu. Tujuan penelitian ini adalah mengetahui besaran dan prilaku koloni burung cangak abu (Ardea cinerea) pengunjung area. Pengambilan data besaran koloni burung pengunjung dilakukan dengan penghitungan langsung (sensus); perilaku selama di lokasi antara lain waktu dan arah datang dan pergi serta aktivitas yang dilakukan burung cangak abu selama di area bandara diamati dan dicatat secara langsung. Semua data yang diperoleh dianalisis secara deskriptif-kualitatif dan diperbandingkan burung lain dan hasil penelitian lain sehingga dapat diperoleh gambaran yang jelas tentang mengapa koloni cangak abu tersebut menjadi pengunjung area bandara. Hasil penelitian menunjukkan. Keberadaan burung cangak abu di Bandara Adisutjipto berpotensi relatif terbesar menimbulkan kejadian bird strike dibanding burung jenis lainnya karena jumlah individu harian yang datang terbanyak, frekuensi kedatangannya tertinggi kedua setelah burung wallet, ukuran tubuhnya yang relatif terbesar, terbang rendah, terbang pelan dan manuvernya juga lamban serta terbang menyilang landasan. Kondisi lingkungan area runway bandara yang luas, lapang terbuka, ditutupi hijauan rerumputan, berangin, aman dari predator, sepi jauh dari kegiatan manusia dan lokasinya yang strategis diantara zona roosting/nesting dan zona foraging/feeding menjadi lokasi yang ideal bagi koloni cangak abu untuk melakukan kegiatan harian loafing. Pengelola bandara JOG perlu meningkatkan kewaspadaan terhadap kemungkinan peningkatan kehadiran burung cangak abu, dan perlu memperluas jangkauan pengelolaan populasi cangak abu di luar wilayah bandara.AbstractBird strike is a bird collision event both in groups and singly with an aircraft in the flight process. Bird strike events can cause minor to serious accidents which are very detrimental to the economy. Although maximum bird control has been carried out based on the available guidelines, bird strikes also sometimes occur at Yogyakarta Adisutjipto International Airport (YAIA) with the level of aircraft damage from heavy to light. One type of bird that causes the bird strike incident at YAIA is grey heron. The purpose of this study was to determine the dayly individual number and behavior of the grey heron (Ardea cinerea), visitors to the YAIA area. Data collection on visitor bird colony size is carried out by direct count (census); behavior while in YAIA, including the time and direction of coming and going, and what the grey heron did during the airport area was observed and recorded directly. All data obtained were analyzed descriptively-qualitatively and compared to other birds and other research results so that a clear picture of why the colony of grey heron can be obtained as a visitor to the YAIA area. The results showed. the presence of grey heron (Ardea cinerea) at Adisutjipto Airport has the highest relative potential to cause bird strike events compared to other types of birds because the highest number of daily individuals, the second highest frequency of arrival after a glossy swiftlet, the largest relative body size, low flight, slow flight and maneuvers are also slow and fly across the runway. The YAIA runway area, which is wide, open and covered with grasses, windy, safe from predators, is quiet away from human activities and a strategic location between the roosting / nesting zone and the foraging / feeding zone makes it an ideal location for grey heron colonies to conduct colony of grey heron daily loafing activities. In conclusion, the manager of YAIA needs to increase awareness of the possibility of increasing the presence of grey herons, and it is necessary to broaden the scope of management of the grey heron population outside the YAIA region.

Survey of 3D digital heritage repositories and platforms

<p class="VARAbstract">Despite the increasing number of three-dimensional (3D) model portals and online repositories catering for digital heritage scholars, students and interested members of the general public, there are very few recent academic publications that offer a critical analysis when reviewing the relative potential of these portals and online repositories. Solid reviews of the features and functions they offer are insufficient; there is also a lack of explanations as to how these assets and their related functionality can further the digital heritage (and virtual heritage) field, and help in the preservation, maintenance, and promotion of real-world 3D heritage sites and assets. What features do they offer? How could their feature list better cater for the needs of the GLAM (galleries, libraries, archives and museums) sector? This article’s priority is to examine the useful features of 8 institutional and 11 commercial repositories designed specifically to host 3D digital models. The available features of their associated 3D viewers, where applicable, are also analysed, connecting recommendations for future-proofing with the need to address current gaps and weaknesses in the scholarly field of 3D digital heritage. Many projects do not address the requirements stipulated by charters, such as access, reusability, and preservation. The lack of preservation strategies and examples highlights the oxymoronic nature of virtual heritage (oxymoronic in the sense that the virtual heritage projects themselves are seldom preserved). To study these concerns, six criteria for gauging the usefulness of the 3D repositories to host 3D digital models and related digital assets are suggested. The authors also provide 13 features that would be useful additions for their 3D viewers.</p><p>Highlights:</p><ul><li><p>A survey of relevant features from eight institutional and eleven commercial online 3D repositories in the scholarly fieldof 3D digital heritage.</p></li><li><p>Presents a critical review of their hosting services and 3D model viewer features.</p></li><li><p>Proposes six features to enhance services of 3D repositories to support the GLAM sector, heritage scholars andheritage communities.</p></li></ul>