bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design of cobalt nickel nitrides/carbon nitride composite catalysts for enhanced electrochemical water splitting
Authors: Ji Jiawei , Zhang Tianqing , Xia Lunhuan , Chen Zikai , Wang Weikai , Wan Xiaokang 
Published: August 2022

Abstract
Design of efficient non-noble metal electrocatalysts for oxygen evolution reaction (OER) have been considered as a crucial issue in the development of future renewable energy utilization. In this paper, we report a composite structure of cobalt nickel nitrides and carbon nitrides as efficient OER electrocatalysts. A facile hydrothermal method was utilized to synthesize the precursors, then the samples were treated with melamine and heated in an N2 atmosphere. The successful preparation of the cobalt nitride nickel/carbon nitride composite catalysts was confirmed by SEM, XRD, and the OER electrochemical performance characterizations. The Co2NiNx/CN catalyst demonstrate an optimal electrocatalytic performance with an overpotential of 0.62 V to reach the current density of 10 mA/cm2, which is lower than that of Ni3N, Ni3N/CN and Co2NiNx. The Tafel slope of Co2NiNx/CN catalyst is only 83.68 mV/dec. The significantly improved electrocatalytic ability is owing to the synergetic effect of cobalt incorporation and imbedding of carbon nitride. The electrochemical impedance spectroscopy characteristics were further investigated to understand the mechanism of the novel non-noble metal electrocatalysts with high efficiency.
Four-row APPLE-Knot undulator mechanical design and test piece studies for High Energy Photon Source
Authors: Huang Y.S. , Yang Y.W. , Li X.Y. , Lu H.H. , Gong L.L. , Li Y.H. , Sun Y.J. , Chen W. , Sun S.C. , Li Z.Q. , Zhao S.T. , Zhang L. , Guo Q. , Gong K.Y. , Zhang X.Z. 
Published: August 2022

Abstract
A four-row APPLE-Knot undulator is under developing in the
High Energy Photon Source to get polarization adjustable synchrotron
radiation and reduce on-axis heat load, because of the exotic
magnetic field design, its construction faces challenges in
mechanical design of frame, magnet blocks holder and integral field
shimming method. In this paper, a mechanical design for APPLE-Knot
undulator has been posed and structural deformation has been
analysed, a test piece has been manufactured to test the physical
design as well as magnetic holder design, integral field shimming
method has also been described and realized, the result presents a
good repeatability. It's a practical design of four-row APPLE-Knot
undulator for the High Energy Photon Source.
Achieving sustainability through reducing risks during architecture design process: a lean management perspective
Authors: Abdelrehim Sherouk M , Nessim Ashraf A , Othman Ayman A E 
Published: August 2022

Abstract
The construction industry, as one of the largest industries in the world, plays a critical role in achieving national and international social and economic sustainable development goals. Socially, it is concerned with delivering long-term projects that turn client and end-user requirements into designs that specify technical aspects, functional specific requirements, and standards of quality. Economically, the construction industry contributes to a country’s gross domestic product (GDP) by creating jobs and providing the country’s infrastructure. the construction industry’s nature is more vulnerable than other industries. This is believed to be due to the complex and dynamic nature of construction projects, as well as the involvement of a large number of participants and organisations with varying goals and priorities. The architectural design process is a crucial stage in the life cycle of a construction project. This is due to the fact that decisions made during this phase have an impact on the project throughout its life cycle. Failure to consider risk factors during this phase will have an impact on the project’s sustainability. Although Lean Management has been successfully applied in many sectors of the construction industry, its application in the design process has received far less attention than in construction literature. Accordingly, this research aims to investigate the role of lean management towards achieving sustainability through reducing risks during the architectural design process.
Towards a Taxonomy of The 21st century Architectural Practices in the age of Sustainability and Technology
Authors: Saleh M.T. , Mansour Y. , Kamel S. , Dewidar K. , Farid A.A. 
Published: August 2022

Abstract
The architectural practices witness drastic transformations in the 21st century globally, which put the architectural community in a situation of crisis; facing challenges to identify different trajectories and their characteristics for a reliable evaluation of the approaches and strategies. Conferences and research laboratories started to seek a philosophy interpreting new practices, mostly known is the 2003 Pompidou exhibition in France discussing “Non-standard Architectures”. This research investigates the interrelation between architecture, and the most-two dialectic terms of the age “sustainability and technology”, linking influencing beliefs and philosophies with the design approaches and strategies through a comprehensive design theory. It emphasizes the paradigm shift from modernism architecture that tied the design to craft to a richer knowledge paradigm ties design, technology and craft in a complex-system. This has more impressive and complex drivers corresponding to the reflects of “The Knowledge Power” coined by Foucault that shapes the whole cultural paradigm and its sub-systems of any society across history. Such a philosophy can reach a meta-theory about current practices of architecture seen as isolated islands or fragmented practices through revealing the radical drivers of current iconic projects and identifying hypothetical boundaries that interprets these typologies and their relevancy to each other promoting a new holistic paradigm of architecture.
A Guideline for Developing Resilient Office Buildings using Nanotechnology Applications
Authors: Nagy Gehan , Adnan Haidy 
Published: August 2022

Abstract
Resilient buildings have become a widely researched topic in the engineering discipline. A building has enabled connectivity between building systems, including air conditioning, ventilation, safety and security system. They are even more important with growing pandemic risks and the spread of airborne viruses such as Covid-19. The literature indicates that nanotechnology applications can have a great role in the designing resilient office buildings. Nanotechnologies play a major role in architectural design; building materials combined with nanotechnology became smaller, lighter, and more efficient than conventional materials. Thus, this research aims to develop design guidelines for resilient office buildings in Egypt using nanotechnology applications. The methodology applied includes a review on nanotechnology and resilient office buildings key design features, following a simulation using design builder program where conducted to modify the nanomaterials in resilient office buildings recorded through quantified data. After applying the nanotechnology concept on walls, the roof and glazing types by inserting nanomaterials. The research concluded that the use of vacuum insulation panel, Nano-gel glass and Nano-painting had the highest impact on decreasing the total energy consumption by 14.5% and carbon dioxide emissions by 42%.
Soundscape Assessment for Indoor Spaces: A case of the Higher Education Environment
Authors: Kamal Ayat K. , Ismail Mostafa R. , Mayhoub Mohammed S. 
Published: August 2022

Abstract
As a concept, an indoor soundscape is an innovative approach to building environments with a shape that "sounds good," meeting the preferences and needs of the occupants and established according to their unique indoor soundscape perception. This paper presents the assessment of the indoor soundscape regarding objective acoustic parameters such as the equivalent noise levels (Leq) and the reverberation time (RT), and subjective method including a questionnaire survey (n = 403) in three buildings of Engineering in Al-Azhar university. The data analyses were conducted using SPSS v.21 statistical software. Overall, results show that indoor assessment is associated with five factors that are: acoustic environment factors, demographics and social factors, sound sources, duration and time of measurement, and non-acoustic parameters. The conceptual framework showed the relations between the acoustic environment, built environment, and auditory perception of university students and staff. Various buildings present a series of acoustic problems based on different activities that change the perception of users, so the outcomes feature the importance in the future considering the type of activity as a key factor in assessing the effects of noise on humans.
Passive measures for energy-efficient economic class housing units in national housing projects
Authors: Ismaeel Walaa S.E. 
Published: August 2022

Abstract
This study investigates passive building design measures and how they may differ according to the surrounding context. This particularly stands as an important consideration for economic class housing units which are seen as repetitive cluster units of the same architectural design plan. These units have a typical design that does not respond to their contexts, hence, the study proves with evidence that the building performance varies from one city to another, taking three cities Cairo, Alexandria and Aswan of different climatic zones. This is carried through a series of computer simulations using a validated software program to investigate the effect of adding passive design measures on building performance e.g. thermal walls, double glazing system, and shading devices. The results verified the significant difference in building energy performance in the three studied cities. It also showed that shading devices are a common passive design measure that contributed towards reducing energy consumption in the prototype building in the three cities. This showed the necessity of integrating proper passive design features in economic class housing units because they represent a repeated prototype building.
Experimental Investigation of the Axial Behaviour for Battened Tubular Columns
Authors: Amoush Essam A 
Published: August 2022

Abstract
This paper describes a series of experiments on batten tubular specimens with various slenderness ratios. The experimental study was employed to satisfy the expectations of behaviour and axial load capability of battened tubular columns. Twelve specimens composed of four tubes having different global column slenderness and various ratios of the unbraced chord slenderness-to-the global column slenderness were chosen to cover stub, short and medium columns. The tubes were assembled with welded batten plates. A numerical model with a thin shell element considered both geometric and material nonlinearities was used to verify the experimental results. Tests result showed different failure modes, such as local, local-flexural and flexural buckling. By comparing, the finite element and tested results have a good agreement. The results revealed the strength of the battened columns, which was related to the effect of global slenderness and spacers on the buckling behaviour. Additionally, the stub, short and medium column strengths were enhanced by 8%, 25%, and 78%; respectively, when the number of spacers increased to four batten plates. Eventually, predicted strengths of the battened column by AISC and EC3 specifications were slightly un-conservative.
Mapping street vendors and informal economy effects in public spaces
Authors: Elsayed Mohamed A. , Ashour Ayman , Elshater Abeer , Elfayoumi Mohamed A. , Mahmoud Shehab 
Published: August 2022

Abstract
Economic and urban planning research differ in determining the emergence of the informal economy. The literature describes the informal economy as the hidden economy in various terms. When it comes to the development of the informal sector, economic and urban planning studies are not on equal terms. It’s common to link the rise of the informal sector to the increase of organised economic activity in the formally organised economy, such as tax systems and competitiveness. This study aims to develop a method for assessing the impact of street sellers on the visual appearance of public spaces. This research used mixed methods comprised of Geographical Information System (GIS) and semi-structured interviews with vendors in the selected cases. Mapping four case studies in Cairo show that street vendors occupied public places, walkways, and site coordination features. The final observations shed some light on the necessity of further investigation into street vendors in diverse situations in various locations in Cairo.
Preliminary Study of Landslide Hazard in Kutai Kartanegara Regency, East Kalimantan using Digital Elevation Model
Authors: Polawan S M , Raharjanti N A 
Published: August 2022

Abstract
The Kalimantan Island is part of the Sundaland crust, namely the Eurasian Continental Plate. The plate is moving to the southeast colliding with the Indo-Australian plate which is moving north. Whereas for Kutai Kartanegara Regency in the Kalimantan Island position is far from the collision zone, so it is relatively stable tectonically. This is important to research that is, due to tectonic processes that occurred earlier, resulting in the formation of geological structures, especially faults. The purpose of the study was to determine the morphotectonic and landslide hazards in the Kutai Kartanegara Regency, where this research was carried out quantitatively with data collection techniques, then analyse landslide hazards based on data; DEM (Digital Elevation Model) including the slope, slope direction, and slope length for vulnerability analysis, geological data from Regional Geological Maps, which include rock formations, distances from faults data and administrative boundary spatial data in the form of vector GIS for the preparation of landslide hazard maps. The result showing Kutai Kartanegara predominantly categorized as moderate to high hazard zone. The low hazard zone covering 9.88% area, moderate hazard zone covering 35.81% area, and 54.31% area is high hazard zone of landslide. The analysis showing that the hazard of the research area consist predominantly sedimentary rocks and controlled by structural geology identified as thrust fault, strike slip fault, and fold which include in Anticlinorium Samarinda. Those lithology and geological structure features along with the slope are identified as controlling factor to the landslide hazard in the research area.
Parameters test on time migration with Kirchhoff method on 2D synthetic data with dipping event and its reflector structural changes
Authors: Datametriana Aurum , Suryanto Wiwit 
Published: August 2022

Abstract
This paper describes the effect of parameter variation with Kirchhoff migration in post-stack seismic data. Parameters tested covering velocity, aperture, and maximum dip. The data used in this work was generated from velocity and density models with gaussian syncline and anticline layer boundaries. This work is the effect of parameter changes on the model and conclude best applied parameters for Kirchhoff migration in certain model created.
Seasonal comparison of groundwater level and quality in the catchment of the Tonle Sap Lake, Cambodia
Authors: Chhuon Kong , Eang Khy Eam , Chork Vuthy 
Published: August 2022

Abstract
Groundwater in the floodplain of Tonle Sap Lake has been used for domestic, agriculture, and small industries. The variation of surface water availability and increasing demand, cause the increasing of groundwater extraction especially during dry season. So far, the study on groundwater resources is extremely limited comparing to surface water in the Tonle Sap catchments. So that, this study focusses on groundwater quality and level from 27 wells in Kompong Thom, Siem Reap, and Preh Vihear province. Seasonal variation of groundwater level shows that groundwater level in Siem Reap is about 1.5m and 4.3m below the ground surface in rainy season and dry season respectively while in Kampong Thom province it is about 0.7m and 2m below the ground surface in rainy season and dry season, respectively. from in situ measurement, some parameters such as pH ranged from 4.1 to 8.1, total dissolved solid from 21 to 1200 mg/L, turbidity from 0 to 88 NTU, temperature from 28 to 31°C, ORP from −2.2 to 424mV, and EC from 35 to 2000 μSm/cm. The concentrations of major ions (Ca2+, Mg2+, K+, Na+, Cl−, SO4
2− and HCO3
−) were approximate or under the permissible value and it was suitable for irrigation.
The Correlation between Rainfall, Temperature, Relative Humidity, and Rice Field Productivity in Aceh Besar
Authors: Chairani S 
Published: August 2022

AbstractVarious factors could affect rice field productivity, such as climate, management practices, and soil properties. Aceh Besar had experienced long drought, higher temperature, shifted seasons, and the decrease yield of rice productivity due to climate change. This research aimed to analyze the correlation between climate variables and rice field productivity, such as rainfall and mean, minimum, and maximum temperatures, relative humidity in Aceh Besar District. The monthly climate data and the rice field productivity data were employed for 10 (2011-2020) and 8 (2011-2018) consecutive years, respectively. The correlation between the climate variables were calculated using Pearson coefficient correlation. The results showed that rainfall and maximum temperature were positively correlated, as well as rainfall and relative humidity. In contrary, rainfall and mean temperature, rainfall and minimum temperature, rainfall and rice field productivity were negatively correlated. The latest indicating that rainfall did not impact the rice field productivity in Aceh Besar. It was quite contradictive to the reality in the field that significantly experiencing the long drought, higher temperature, shifted seasons and the decrease yield of rice field productivity. This was due to the lack of climate data employed that required longer period preferably 30 to 50 years which was not available.
Assessment of Agricultural Irrigation water from Groundwater in Lobalain District, Rote Ndao Regency, East Nusa Tenggara Province, Indonesia
Authors: Riady Rony Rahmad , Wilopo Wahyu 
Published: August 2022

Abstract
Determination of water availability for irrigation consists of quantity and quality. However, water quality is generally often neglected. This study aims to determine the groundwater quality in order to meet the standard of agricultural irrigation quality standard in the Lobalain District, East Nusa Tenggara Province, Indonesia. The results showed that the groundwater quality with a predominantly pH value did not meet the standard. The none restriction on use class dominated the total dissolved solids (TDS) value. The average electrical conductivity (EC) value is less than 750 μs/cm. The chloride is dominated by less than the tolerance threshold (Cl-<4.0 meq/l), for sulfate (SO4), which is within the threshold (<20 meq/l), and the nitrate (NO3N) dominated as slight to moderate. The boron (B) showed positive results, which in all areas was very satisfactory because it is below the tolerance threshold (B<0.7 mg/l). The sodium percentage (Na%) analysis was dominated by excellent and good class, and the excellent category dominated the sodium adsorption ratio (SAR). Eight locations are highly recommended as agricultural irrigation sources due to their groundwater quality. Only one location is not recommended in Kuli Village because only three parameters (Na%, EC, and Cl-) meet the irrigation water quality standard.
Can port concrete infrastructures be optimized to promote algal and macrofaunal colonisation in the marine intertidal zone? Case study of Port Haliguen (Brittany, France)
Authors: Lapinski M , Perrot M , Sauleau P 
Published: August 2022

AbstractVarious studies highlight the efficiency of working on the nature of port infrastructures (materials, structure design for water retention and creation of microhabitats) in order to improve ecological functions in and around port areas. The aim of this work which was carried out at Port Haliguen (Brittany, France) was to study the colonisation of different types of concrete formulations, including 3D-printed concrete, assumed as more favourable for sessile marine life due to their intrinsic characteristics (surface pH, roughness, porosity). During the first year, no differences were shown between the settlement of algae and macrozoobenthos on each of the formulations regardless of the water level. Percentages of coverage were extremely high after only 5 months and mean diversities were not different. However, the finer grain porous concrete showed a great potential to promote the settlement of the engineer speciesFucus vesiculosuson vertical seawalls. The 3D-printed concrete formulation appears to date to be compatible with marine life colonisation. The advantages of this new technologies to create complex habitats could be of great interest applied to the integration of large scale eco-engineered strategies in urbanized shoreline areas such as ports in Brittany.
Development of laboratory tests to measure the growth kinetic of micro-algae of concrete in marine environment and comparison to in-situ experiments
Authors: Morin V , Duchand S , Dubois-Brugger I , Perrot M , Lapinski M , Vacher S 
Published: August 2022

Abstract
Climate change associated with population growth drive the building sector’s innovation in developing new ecological and sustainable concrete solutions. Regarding marine environment the rise of sea level is a main concern for several big cities across the world. New sea defense infrastructure around cities is expected to rise in the coming years. This will not be possible and accepted without any ecological compensation and thus by developing new ecological concrete range. The development of Bio-active concrete is one part of the solution: in addition to their conventional structural performance, these concrete promote marine bio-fouling and biodiversity. To reach this objective, a laboratory test was developed to screen different concrete surfaces and compositions. The bio-receptivity capacity of a concrete surface is measured by the amount of micro-algae on the concrete surface after four weeks test. This quick lab test supported the development of a new range of concretes called Bi-Layer porous concrete made up of one structural layer and one highly porous bio-active layer. These concrete were implemented as quay walls and reefs in Mediterranean and Atlantic sea. Very promising results were obtained after 18 months of immersion regarding bio-fouling activity and micro-algae diversity on the concrete confirming the results given by the laboratory test.