Membránové kontaktory a jejich aplikační potenciál

Nowadays, due to the scarcity of natural resources, there is more pressure on the reuse of materials and the application of circular economy principles. For this purpose, increasingly efficient and energy-saving technologies capable of extracting valuable raw materials from waste streams are needed, thus reducing energy and material dependence on primary resources. One such innovative technology is represented by membrane contactors, which enable mass sharing without the need for phase dispersion within each other, thus achieving lower operational and space requirements, as compared to conventional mass sharing devices (e.g. packed bed, tower column or stirred bed reactors). In addition, membrane contactors are very versatile and can be used not only for the recovery of valuable materials from waste streams in waste management processes (in particular recycling of metals or organics), but also as life-saving devices in biomedical applications (e.g. as extracorporeal blood oxygenation devices).

Hydrogen-based technologies in maritime sector: technical analysis and prospective

The maritime transportation sector is one of the main contributors to global emissions of greenhouse gases (GHGs). The International Maritime Organization (IMO) has adopted a strategy to reduce these emissions from international shipping >50% by 2050, compared to 2008’s emissions. Therefore, ship owners need to adopt solutions to bring emissions within these and other future limits by means of environmentally friendly fuels (hydrogen or hydrogen carriers) and high efficiency propulsion technologies (fuel cells). This paper focuses on the replacement of the conventional Diesel genset installed on a hybrid small-size ferry, with an innovative system based on PEMFC technology. A real case scenario is investigated: the total energy/power demand of the vessel is determined basing on a typical operational profile. Then, a preliminary redesign of its powertrain configuration is proposed along with an energy management strategy. The analysis has allowed to define the hydrogen consumption for a daily operation. Finally, different storage technologies involving both compressed and liquefied hydrogen have been considered and compared, in order to identify ship’s weight and space requirements.

Design and Implementation of Highly Integrated Electronic System for Small-Size Spacecraft

Due to the tight installation space, strict weight requirements, numerous functional units and dense wireless equipments of small-size spacecraft, the traditional electronic system design of aircraft cannot meet the requirements of miniaturization and lightweight for small-size spacecraft. In this paper, a highly integrated electronic system suitable for small-size spacecraft is designed, in which many key technologies such as miniaturization and lightweight design technology, multi frequency wireless electromagnetic compatibility design technology, small aircraft low delay cooperative networking and high-precision differential positioning are adopted. The proposed highly integrated electronic system makes timing control, attitude and orbit control, wireless telemetry, networking communication, satellite navigation, power distribution and other functions integrated. The total weight of the system is about 7.62kg, which is much lighter than existing electronic system. The experiment results that the highly integrated electronic system achieves good effect. This technology has broad application prospects in small-size aircraft with strict weight and space requirements.

STRUCTURAL DEVELOPMENT OF MOSQUE BUILDING BASED ON ADDITIONAL CAPACITY OF PRAYER ROOM

<p>Mosques serve as a place of worship and foster Muslims who live around the mosque, so the function of this can give a positive impact for Muslims’ life. Mosques also function as a place for developing people’s activities from the time of Prophet Muhammad to the present. It certainly plays important roles so the condition of the mosque, especially the interior, needs to have comfort element in order to get more solemnity when carrying out those activities. Mosque Al-Hidayah is located in Kampung Belentuk RT 001 RW 001, Kelurahan Cimahpar, Kecamatan Bogor Utara, Kota Bogor. This Belentuk village area has a land area of 23 hectares with a Muslim population of 1571 and 807 of them are men. This village has three mosques which Masjid Al-Hidayah is one of them. At this time, mosque Al-Hidayah has land area of 339 m² with a building area of 128,9 m² so that the room capacity can only accommodate 106 people. The number of men of Kampun Belantuk are divided into those three mosques of the village, even so, Mosque Al-Hidayah is not able to accommodate the number of people especially on Friday prayer because the number of worshipers is more than the current capacity of the mosque. The result of the analysis shows the need for prayer space is 330 m2 to accommodate 270 worshipers in prayer activities, especially Friday prayers, then the result of the analysis of the existing concrete structure were carried out by means of a concrete bounce test using the Hammer test, it is known that the average value of the concrete quality in the column is fc'=13.34 MPa, the block is equal to fc'=14.41 MPa. It indicates that the quality of the existing concrete of the Al-Hidayah Mosque does not meet the requirements of SNI 2847-2019 Article 19.2 concerning the minimum allowable normal concrete quality, then the design is carried out according to space requirements and a structural analysis is carried out on the planned design. The planned design is based on the existing space and land requirements which are 15 m x 14 m with a height of 3.5 m per floor and structural analysis is declared safe.</p>

Private Green Open Space Arrangement through Indonesian Building Permits

Private Green Open Space (GOS) is a part of the proportion of Urban GOS of 10%, complemented by 20% of public GOS. In 2019, DKI Jakarta Province had an urban GOS area proportion of 9.8%. The arrangement of private GOS is inseparable from limitations based on the provisions of space intensity, space requirements, and availability of land ownership. This study discusses the arrangement of private GOS through building permits that can increase the proportion of urban GOS. This research was conducted in Jatinegara District, East Jakarta City. The research method that will be used is quantitative. The descriptive statistical analysis method was used to process secondary data in Public GOS data shows the proportion is currently still far from 30% and building permit data for the 2019-2020 period in Jatinegara District shows the proportion of private GOS at 33.46%. For housing with limited land, alternatives are needed to provide private GOS such as green roofs or vertical gardens.

The Effect Of Relaxing A Deep Breath On Anxiety Levels

Emotions and breathing are closely linked in a complex feedback loop. Understanding this interrelationship between breathing and emotions is critical to better understanding how to deal with anxiety, stress, depression, and emotional disturbances. During emotional attacks and anxious states, the autonomic nervous system triggers physiological variables such as heart rate, breathing, blood pressure, hormonal secretions, palpitations, gastrointestinal functions suddenly increase as a result of which the normal social and behavioral functions of the individual are disturbed. It is generally believed that deep breathing, practiced with various techniques, such as qigong and yoga, can promote relaxation. Source searches were carried out on the online portal of journal publications as many as 10 sources from Medscape, Google Scholar, National Center for Biotechnology Information (NCBI) with the keywords anxiety, relaxation, and deep breathing. Deep breathing relaxation has been shown to be effective in reducing the perception and symptoms of anxiety. Deep breathing offers several advantages over conventional therapies currently used to treat anxiety problems. These advantages include a non-pharmacological approach, safety, minimal space requirements, ease of learning, and ease of practice.

Evaluating CephFS Performance vs. Cost on High-Density Commodity Disk Servers

CephFS is a network filesystem built upon the Reliable Autonomic Distributed Object Store (RADOS). At CERN we have demonstrated its reliability and elasticity while operating several 100-to-1000TB clusters which provide NFS-like storage to infrastructure applications and services. At the same time, our lab developed EOS to offer high performance 100PB-scale storage for the LHC at extremely low costs while also supporting the complete set of security and functional APIs required by the particle-physics user community. This work seeks to evaluate the performance of CephFS on this cost-optimized hardware when it is combined with EOS to support the missing functionalities. To this end, we have setup a proof-of-concept Ceph Octopus cluster on high-density JBOD servers (840 TB each) with 100Gig-E networking. The system uses EOS to provide an overlayed namespace and protocol gateways for HTTP(S) and XROOTD, and uses CephFS as an erasure-coded object storage backend. The solution also enables operators to aggregate several CephFS instances and adds features, such as third-party-copy, SciTokens, and high-level user and quota management. Using simple benchmarks we measure the cost/performance tradeoffs of different erasure-coding layouts, as well as the network overheads of these coding schemes. We demonstrate some relevant limitations of the CephFS metadata server and offer improved tunings which can be generally applicable. To conclude, we reflect on the advantages and drawbacks related to this architecture, such as RADOS-level free space requirements and double-network penalties, and offer ideas for improvements in the future.

Space Transformation in Residential House Small Entrepreneurs Banana Sale

Space transformation occurs in line with the needs and availability of resources owned by space users. The arrangement and utilization of space is carried out to optimize the function of the space owned and the limited space owned by the space user requires an adjustment in the use of the space owned to achieve business goals as well as the comfort of the living environment. Pante Bidari is a banana sale producing area in Aceh, which is located in East Aceh Regency, where the majority of the people work as small entrepreneurs and workers in the Banana Sale Industry. The process carried out when producing Pisang Sale uses a special room consisting of a storage room, peeling room, sale room and packaging room. This study aims to determine how the transformation of space in a small banana sale house. The method used in this research is a qualitative method. This study found that the spatial transformation that occurred in the small businessman's house of Pisang Sale in Pante Bidari District, East Aceh Regency is one way to optimize the utilization and utilization of space, so that the Pisang Sale production room consists of storage room, stripping room, sale room and packaging room. using residential space as an aspect of activity in residential homes, so that ongoing activities are not disturbed by other activities, residential space in terms of space dimensions there are changes that include addition, reduction and movement of space aimed at adjusting space requirements. Judging from the spatial relationship, there are several spaces that are far from each other and close to each other, so that access to activities carried out can optimize the function of the space.

Application of green concept on mixed-use building design

Green concepts are important things to apply on buildings. The application of the green concept on mixed-use buildings must consider several criteria, one of which is the comfort aspect. The density of commercial buildings in Medan City causes a reduction in green open space, and even many buildings do not comply with the minimum green open space requirements on their buildings, which can support the development of this city to reduce environmental temperatures. The aim of this study is to analyze the green concept that can be applied to mixed-use buildings in urban areas. A mixed-use building design with the application of green building principles is the right choice to reduce the effects of climate. The green building concept can help reduce excess heat radiation inside and outside the building. The method used is qualitative with data collection techniques through observation. The analysis was carried out descriptively to obtain a mixed-use building model with the green building concept. The results show that land use efficiency, energy conservation, materials and water conservation can be applied to provide comfortable on buildings.

Resource Capacity Requirement for Multi-Terminal Cooperation in Container Ports

Capacity sharing among neighboring terminals offer a means to meet increasing or unexpected demand for cargo-handling without additional capital investment. This study proposes a model for capacity requirement planning of major resources, such as quay cranes (QCs), storage space, and gate, in multiterminal port operations where demand is time dependent. A resource profile simulation is run to generate random events across the terminals and estimate the capacity requirement in the form of workload distributions on port resources over time-shifts. The effects on workload requirement, arising from multiterminal cooperation, are subsequently evaluated in consideration of different container flows among terminals. Experimental results suggest that higher transferring rate between terminals will reduce the QC intensity and storage space requirements but increase gate congestion. Variabilities in the QC intensity and storage space requirements also increase due to shorter stays and more movements in container inventory at the yard. The interaction effect between transferring and trans-shipment rates further shows that the average resource requirements for a terminal can be greatly reduced when the interterminal transferring of containers contributes positively to a more even workload redistribution across terminals. The most significant improvements occur when trans-shipment rate is 85% and transferring rate is 75% for QC intensity; trans-shipment rate is 90% and transferring rate is 60% for storage capacity; and trans-shipment rate is 80% and transferring rate is 75% for gate congestion.