bluuebunny/crossref_metadata_2025 huggingface dataset:
Geochemical characteristics of soils in natural and disturbed landscapes of the Tunka basin
Authors: Lyapina E E , Cherkashina A A
Published: January 2021

The paper evaluates the distribution of chemical elements in the soil of the Tunka basin (the Republic of Buryatia, Tunka National Park). In this regard, we studied their gross concentration in natural and agrogenically transformed soils: arable land, fallow lands, hayfields, and pastures. The distribution of chemical elements in the soils of the Tunka basin is extremely uneven, except for Fe, Al, Mg, P, Sr, Zn, and Co. The concentrations of chemical elements, as a rule, do not exceed standard values, except for Cr, Ni and Pb. Opposite patterns characterize the nature of the interaction of mercury with chemical elements of groups of different geochemical classifications, depending on the degree of anthropogenic load. In natural soils, the concentration of mercury increases with an increase in the concentration of silicon and phosphorus and a decrease in other heavy metals: Fe, Pb, Cu, Co, Ti, Ni, V, Cr, as well as aluminum and magnesium. In disturbed soils, Hg is directly proportional to all of the above elements other than manganese. The change in the content of most of the studied chemical elements with depth in natural soils decreases with depth. In disturbed soils, there is no such tendency due to mixing of the soil layer in the upper 50 cm layer due to the use of land for arable land.
Bias-corrected precipitation data for South Siberia
Authors: Ryazanova A A , Voropay N N , Dyukarev E A
Published: January 2021

Assessing changes in extreme hydroclimatic phenomena requires accurate precipitation estimates with high temporal and fine spatial resolutions. Significant differences were obtained between reanalysis data and observations at weather stations. Bias correction method applied to ERA5 total precipitation product with spatial resolution 0.25×0.25 ° is reported in the present paper to improve the reproducibility of the local weather conditions. Hourly ERA5 precipitations were aggregated and monthly precipitation sums were processed. Monthly precipitations for 133 weather stations in Siberia for May-September from 1979 to 2017 were used as reference data. Comparative analysis has shown that long-term average monthly precipitations from ERA5 reanalysis are higher than precipitation estimations from the observation data. The number of weather stations where the difference between two data sets exceed 60% vary from 3 in July to 37 in May. To eliminate significant differences between reanalysis and observation data, we have developed a specific procedure for correcting reanalysis data. As a result of the adjustment, the deviations of the reanalysis data from the observation data has decreased. The difference after correction is lower than 60 % at all weather stations, and from 94 (July) to 118 (August) weather stations has the difference lower than 30%.
Influence of neotectonic processes on the transformation of geosystems of the Lena-Angara plateau
Authors: Konovalova T I , Nogovitsyn V N
Published: January 2021

Addressing the issues of assessing and predicting environmental changes in regions is the basis of modern geographical research. It is based on identifying the direction of geosystem transformation consisting of a large number of variable components and their interconnections. The task is compounded by the need to study geosystems developing under climatic and geodynamic changes. The paper presents the research results of the transformation of geosystems of the Lena-Angara plateau, which is located on the southeastern outskirts of the Siberian Platform and is a pre-rift structure of the Baikal rift zone. The specificity of the spatiotemporal transformations of geosystems associated with the manifestation of neotectonic processes and climatic changes in the Late Cenozoic is revealed. It was determined that within the plateau there were four periods of irreversible transformations of geosystems caused by the synchronous manifestation of climatic and neotectonic processes. Changes resulted from neotectonic processes led to the formation of landscape boundaries coinciding with deep faults and blocks of the earth‘s crust.
Sustainable landscape for high urban temperature mitigation in the disaster-prone coastal city of Banda Aceh, Indonesia
Authors: Irwansyah Mirza , Zuliansyah Sahlan , Hasan Izziah
Published: January 2021

Coastal City of Banda Aceh has experienced considerable changes related to urban morphology, and also the environmental and climatic aspects, particularly after a massive earthquake hit the City on 26th December 2004. The city’s climate is basically characterized by high air temperature and relative humidity. However, climatic data of 1995-2015 shows that its temperature has actually increased. The issue worsens the thermal comfort, lead to more energy used for cooling, and can even induce heat-stress-related health problems. Urban heat island effect is one potential cause, triggered by significant progress of infrastructure development, increased number of vehicles, and land-use changes. It argues that sustainable urban landscaping is a prerequisite to environmental sustainability, especially in coastal city that prone of disasters. This study composes and analyzes the potential of vegetative measures for mitigating the issue. To provide reflective solutions, both substantial vegetative cooling mechanisms are studied. Hence, the paper asserted that unsustainable use of urban landscape structures leads to environmental problems, such as biodiversity loss, climate change, and soil erosion. The outputs become the foundation for the strategic framework of the proposed vegetative measures, i.e. tree planting, development of greenspaces with optimum size, cover composition and distribution, and green façade application to support sustainable landscapes. The impact of each vegetative intervention is investigated through microclimate simulations run using ENVI-met. Air temperature and other climatic factors related to outdoor thermal comfort and urban heat island are used as the indicators. The results reveal that landscaping such: tree planting with proper distance, adjusted based on tree canopy’s width to optimize shading, improves outdoor thermal comfort considerably, while the impact on urban heat island is rather small. On the other hand, green facade application only impacts insignificantly on both aspects.
Village fund asymmetric information in disaster management: Evidence from village level in Banda Aceh City
Authors: Nugroho A , Takahashi M , Masaya I
Published: January 2021

The Village Fund in Indonesia is one of the instruments for budgetary decentralization to accelerate development and community empowerment at the village level. Under the regulation of the Minister of Village and Development of Disadvantaged Regions and Transmigration No. 16, the year 2019, one of the priorities for the use of the village funds is for disaster management. In the implementation, however, asymmetric information and misperception towards the regulation allegedly caused the management of village funds not to be connected with disaster risk reduction programs. This study aims to identify priorities for allocating village funds related to disaster management programs. Furthermore, this study will also determine the factors that cause information asymmetry at each level of policymakers. This research was conducted in 7 villages located in three sub-districts, which were severely affected by the 2004 tsunami in Banda Aceh City. The results of this study show the asymmetry of perceptions exists among the policymakers from the city to the village levels. This asymmetry has led to disaster management programs not being a priority in the use of village funds. The absence of regulation in the city levels hinders village leaders to use of village funds for disaster management.
Vulnerability factors in small islands and environmental carrying capacity by the AHP method. Case Study: Weh Island, Aceh, Indonesia
Authors: Arif A. A. , Machdar I. , Azmeri  , Achmad A.
Published: January 2021

This study was intended to investigate the effects of land use change and land cover processes on Weh-Sabang Island, Aceh, Indonesia. The LULC change process was analyzed using Google Earth and ArcGIS imagery from 2008 to 2018. Through observations of satellite imagery, it was detected that the green space area had been greatly reduced on Weh island and turned into a built-in area that served as a tourist area and urban environment. Increased land use in ten years from 2008 to 2018 can cause changes in morphology and typology of the city of Sabang. Through the method of calculating the Land Diversity Index, as a criterion and sub-criteria for the Analysis Hierarchy Process (AHP) method, land changes will be monitored in the period of the last 10 years. In plain view, coastal areas experience more land use changes than hilly areas, towards LULC changes on Weh Island. This paper focuses on areas with high vulnerability to the occurrence of disasters on Weh Island using ArcGIS software. It is expected that the results of this study can contribute to the government of the city of Sabang - Weh Island in controlling changes in land use that are experiencing land degradation, and making input in carrying out an analysis of the carrying capacity of the environment on small islands in Indonesia.
Impacts of collective housing relocation in the Ogatsu area of Ishinomaki City after the 2011 Great East Japan Earthquake and Tsunami
Authors: Miyasada Akira , Maly Elizabeth
Published: January 2021

Eight years have passed since the Great East Japan Earthquake and tsunami, which devastated communities along Japan’s northeast Tohoku coast on March 11, 2011. Housing reconstruction programs in tsunami-affected municipalities included the provision of new residential lots in highland areas and the construction of public housing. The implementation of government-driven recovery projects is almost complete in the municipalities that were destroyed by the tsunami. However, even with these projects, some areas have suffered extreme population loss. Looking at the example of Ogatsu Peninsula and the case of Tachihama village, this paper considers the factors that contributed to residents’ deciding to move away or return and rebuild. According to the majority of the residents who moved away, the prospect of living in temporary housing for the length of time needed for permanent housing to be ready was their main reason for deciding to move somewhere else. Although housing recovery programs are intended to support the rebuilding of communities, the implementation and timeline of the government’s reconstruction programs may actually contribute to or accelerate population decline. As the implementation of reconstruction programs alone after a disaster occurs is not enough to guarantee the housing recovery of all residents, it may be important to consider pre-disaster community-building for the long-term sustainability of disaster-affected communities.
Spatial Thinking and Decision-Making Abilities to Learn About Disaster Preparedness
Authors: Ridha S , Utaya S , Bachri S , Handoyo B , Kamil P A , Abdi A W
Published: January 2021

Disaster preparedness is one concern in Indonesia for natural disasters have frequently occurred in the country, both geologically and environmentally. Disaster preparedness focuses on activity series which are related to organizational ability, spatial thinking, and decision-making abilities. However, the two latter are still unconcerned. This study aims to improve disaster preparedness through spatial thinking. It is an action research, with the subject of 32 high school students who were studying geography lesson. The data were analyzed using descriptive statistical techniques. The study results are: (1) there was an increase in students’ knowledge about disasters with the classical completeness of 92%, proving the effectiveness of the learning process (2) It is easier for students to understand the concept of disaster through spatial thinking. Spatial thinking includes three components, namely: (a) the spatial concept as the space and direction, such as points, regions, distances, which are vital during disaster; (b) tools of representation, such as maps of an area as representations of the real-world; (c) the process of reasoning for problem-solving through a spatial perspective by using a variety of cognitive skills and knowledge. Therefore, schools need to facilitate teachers to implement spatial thinking-based disaster education in preparing young people to face disasters.
Exploratory study for strengthening education sectors for responding to complexities due to NATECH (Natural-Hazard Triggered Technological disasters) disasters
Authors: Lestari Fatma , Jibiki Yasuhito , Pelupessy Dicky , Imamura Fumihiko , Zulys Agustino , Kadir Abdul , Paramitasari Debby
Published: January 2021

The city of Cilegon in Banten Province, Indonesia is selected as a site of this study. The city locates in the western edge of Java Islands and is known as one of the most famous and significant heavy industrial zones in Indonesia. Cilegon is potentially exposed both to natural and industrial hazards so that we can consider it as a suitable place for studying NATECH (NAtural-Hazard triggered TECHnological disasters) disaster situations. The Indonesian government indicates the presence of seismic gap in the Sunda Strait and the associated tsunami risk. Large-scale facilities of chemical, petrochemical, oil and gas industries stand in coastal areas in Cilegon. The industry and its surrounding communities can be affected by combination of the natural and industrial disasters. In Cilegon, we aim at strengthening capacity of the education section in the Cilegon city government and the school principals and teachers. Our preliminary implementation and survey reveal that knowledge and understanding of teachers are very limited. We will combine existing research findings from both of industrial accidents and tsunami, and develop educational materials.
Different vantage points amongst different stakeholders in NATECH (NAtural hazard-triggered TECHnological) disasters: A case from the 2018 Mt. Anak Krakatau eruption and tsunami
Authors: Pelupessy Dicky , Jibiki Yasuhito , Lestari Fatma , Zulys Agustino , Imamura Fumihiko
Published: January 2021

Previous literature on natech (Natural hazard-triggered TECHnological) disasters argue prevailing difficulties in establishing collective response and sharing common knowledge amongst different and a variety of stakeholders. We aim to describe such challenges using a case study and examine the relationship amongst the actors. Our case study focused on the 2018 Mt. Anak Krakatau eruption and the tsunami triggered by it. In this disaster, one of the largest industrial zones in Indonesia was partially affected. Our study largely explains the results based on some series of discussions with private companies and representatives of the residents collected in 2019 (from February to July). We also referred to the publicly available information, which relevant agencies in the Government of Indonesia issued. Although there were no physical damages in the factories and no causalities, staff in many facilities were worried about the situation and the surrounding residents were also scared how things would be going. The residents were not able to behave in collectively organized manner, because they faced with a lack of the synthesized and coordinated information and instructions. The residents were fully aware of the risk of natech disaster, but such awareness was not necessarily connected with reasonable risk perception and organized behaviours. Relevant organizations complied with their own protocols, but it did not necessarily bring better consequences. The meteorological agency disseminated information in their limited capacity. The volcano monitoring agency paid the limited focus on the volcano and its adjacent sea area. The national and local disaster management agencies tried to integrate technical information, but it took time. The companies carefully gathered information, but their priorities initially went to their internal response, including taking care of the families of their employees. These findings indicate that efforts were done in the right course separately and it is hard to achieve harmonized response under great uncertainty during a crisis.
Determinants of The Community’s Understanding of Disaster Mitigation: Case of Tsunami In Banda Aceh
Authors: Putra Teuku Roli Ilhamsyah , Oktavia Vika , Oktari Rini Suryani
Published: January 2021

This research aims to know-how education, media information, event frequency and type of event affect the community’s understanding of disaster mitigation. Primary data has collected from the survey which was conducted in 2011 in Banda Aceh, around six years after the tsunami disaster December 26 2004. This survey did when the sustainability reconstruction program for tsunami post-disaster had been implementing in Aceh in the range of April 16, 2009, to December 31 2012, after its emergency response and reconstruction programs ended on April 16 2009. The research method used is a verification survey with 223 respondents as a sample. The Questionnaire is analyzed using multiple linear regression to test the hypothesis. Qualitative analysis enriches this survey by collecting and evaluating the related documents. Overall, all variables have an influence of 68% on the community’s understanding of disaster mitigation. The media information affects the community’s understanding of disaster mitigation significantly, while the education, event frequency, and type of event do not affect the community’s understanding of disaster mitigation significantly. The originality lies in the integration model of causality theories from the previous ones and uses multiple linear regression to test the model. The limitation is in the number of variables and the object. This fact implies enriching knowledge in the social sciences and as a basis for further new research models of disaster management. It also implies practical people who implement related variables.
An analysis of post-tsunami migration patterns amongst low-income women to the city of Banda Aceh
Authors: Aidar N. , Farlian T.
Published: January 2021

This study discusses the migration patterns of low-income women in the city of Banda Aceh after the December 26, 2004 tsunami and the factors that affected them. Primary and secondary data were used to determine the factors behind migration. Secondary data were obtained from the Central Statistics Agency, the Population and Civil Registry Office of Banda Aceh City, Baitul Mal Banda Aceh. Primary data were obtained from respondents representing three sample districts, namely Syiah Kuala sub-district, Baiturrahman sub-district and KutaAlam sub-district. All of the respondents were women who made the transition to Banda Aceh after the tsunami and are now permanent residents of the city of Banda Aceh. About 60 women were interviewed using a pre-prepared questionnaire. The data obtained were then analyzed using descriptive analysis based on the Snowball sampling method and simple statistics. The results of the study describe the main reasons that women migrated to the city of Banda Aceh after the tsunami, with 64 percent considering employment and job opportunities, 49.1 migrated because of their husband demands, 72 sought better housing prospects, and 3.3 percent sought to avoid locations impacted by the tsunami. This research demonstrates the need for governmental policies regarding increasing employment opportunities for women so they do not become an economic burden to the city of Banda Aceh.
The Views of Survivors on dark heritage preservation
Authors: Meutia Zya Dyena , Akbar Roos , Rosyidie Arief , Zulkaidi Denny , Maryati Sri
Published: January 2021

This paper discusses how survivors’ views in preserving dark heritage post-tsunami in Banda Aceh are. Little is known about survivors’ views in preserving the dark heritage and it is not clear what significance values are owned by the survivor in looking at sites that are suspected of being dark heritage in context post-tsunami. The research to date has tended to focus on perspective and preservation decisions from government, experts, and visitors rather than survivor views in the context of post-disaster heritage. This paper promotes survivors’ views in preserving dark heritage as a performance that transcends an emphasis on victim, toward framing a dark heritage construct that is productive and dynamic, a steward for post-tsunami disaster identities who have the significance values. The main question put in this research is: How “survivors’ views” in Banda Aceh together with its stigmatized image and identity can be interpreted in dark heritage post-tsunami disaster? This research is done from an interdisciplinary interpretative approach, using a combination of methods such as narrative and discourse analysis. The research shows survivors have an important role in preserving the dark heritage that productive and dynamic, together with culture and social practices where the mosque is considered as a component of heritage the most important to preserve. The current study is based on 50 peoples as key informant carried out on the July and August 2019, the findings suggest components such as the mosque, Ship PLTD Apung, ship above houses, mass grave, and social practices religious rituals be an important heritage for the community survivor as remembering. Survivor also said that dark heritage has a role practical in the region related to the rebuilding of sustainable urban heritage planning.
Simulation study of sanding region prediction in unconsolidated reservoir with frac-pack
Authors: Li Mingzhong , Xue Jiaqi , Qi Minhui
Published: January 2021

Frac-packing has been widely used in the development of unconsolidated sandstone reservoirs because it can meet the needs of stimulation and sand control. In this work, the induced stress generated by the artificial fracture was taken into consideration to simulate the geo-structure of a frac-packing well. The fluid-structure coupling model was utilized to solve the reservoir stress distribution, and the critical equivalent plastic strain was introduced to determine whether the element was damaged. Using the proposed model, the comparison between gravel packing and frac-packing on the critical sanding velocity and sanding region distribution were carried out. Sensitivity analysis of parameters that may affect the sanding of frac-packing well, such as Young's modulus, fracture width and length were conducted as well. The simulation results showed that frac-packing is an effective sand control technique which can reduce the reservoir sanding significantly.
Study on Optimization of Deep Foundation Pit Support Scheme under the Influence of Traffic Dynamic Load in the Reconstruction and Expansion of Jiqing Expressway
Authors: Kang Li , Tang Gangxiang , Bai Song
Published: January 2021

In this paper, based on the deep foundation pit support of the reconstruction and expansion project of Jiqing expressway, the FLAC3D software is used to establish the numerical calculation model of the deformation support of deep foundation pit under the influence of traffic dynamic load. The numerical calculation results are consistent with the actual project monitoring results. By changing the key support parameters such as pile diameter and pile distance, pile length, the level of piles under different support schemes is analyzed. The results show that the ideal diameter of bored pile is 0.8-1.2m, the spacing is 1.1-1.3m, the length of pile is 23m-28m. The horizontal displacement of pile body and ground settlement decrease with the increase of length and diameter of support pile. Considering the safety of foundation pit and the reduction of project cost, the pile with length 23m and diameter 0.8m is chosen in the practical engineering.
Quantitative Characterization of Grouting Stones for Drilling with Pre-stressed Concrete Pile Cased Pile
Authors: Hou Zhenkun , Tang Mengxiong , Hu Hesong , Lin Zegeng , Chen Hang , Liu Chunlin
Published: January 2021

The bearing property of Drilling with pre-stressed concrete pile cased pile is closely related to the grouting effect on the pile side. Based on the 3D scanner, the characteristics of the grouting stone body was quickly obtained with large area and high resolution through high-speed laser scanning measurement technology and extrapolation multi-frequency phase-shift laser grating technology, and the following conclusion was drawn: the quantitative characterization method of grouting rock mass based on the 3D scanner is stable and reliable, its workload is small, data density is large, test process is accurate and fast, and it overcomes the shortcomings of traditional manual measurement; under the condition of same elevation, the thickness of grout decreases as the distance away from the coordinate origin increases, namely in the same horizontal plane, the farther the horizontal distance away from the grout outlet position, the smaller the grout thickness; the greater the elevation, as the horizontal distance away from the grout outlet increases, the larger the decrease rate of grout thickness, the faster the grout thickness decreases; when the horizontal distance away from the grout outlet position is constant, as the elevation increases, the grout thickness gradually decreases.
Experimental study of influence regularity of pyrite-bearing filling joints on mechanical properties of coal-rock
Authors: Zhang Zhen , Zhan Qichao , Yang Huisan , Jiang Tianqi , Wang Feng
Published: January 2021

The acoustic emission (AE) monitoring technique, scanning electron microscope (SEM) system and uniaxial compression test were carried out to study the effect of pyrite-bearing filling joints on the mechanical properties of coal samples. The results show that the pyrite-bearing filling joints have adverse effect on strength, elastic modulus and peak strain of coal samples. Compared with the relatively complete samples, the post peak failure was ductile of samples with pyrite-bearing filling joints, the stress-strain curve was ladder-shaped after the peak and the AE energy of each drop appeared a peak. Many inclined and slender filling joints on the coal surface had a significant effect on the mechanical properties of the samples. Under the action of axial compression stress, the internal cracks of coal-rock with pyrite-bearing filling joints had enough time to expand and connect, and induced failure of surrounding structures, thus reducing the strengths of the samples. When fine pyrite-bearing filling joints on the coal surface, the distribution of macro-cracks were less, and SEM image showed that the fracture surface was relatively flat. While many inclined and slender filling joints on the coal surface, the sample failure accompanied by more macro-cracks, and SEM image showed that there were more holes and cracks on the fracture surface.
Gradient-Based Production Optimization in Reservoir Development
Authors: Zeng Yijin , Nie Yandong , Yang Yi
Published: January 2021

One of the core contents of intelligent oilfield is to develop proved oil resources economically and effectively. The way to realize it is to make reservoir development in the optimal state in real time based on the existing production conditions. Water flooding is a commonly used technique after primary oil recovery. However, due to the influence of formation heterogeneity, the injected water breaks through the high permeability layer and traps the crude oil untouched. In order to solve such problems, a new optimal control model is proposed here, which aims to maximize the net present value of reservoir development and production. By solving the mathematical model of development and production, the input and output control parameters of reservoir are optimized in real time to obtain the optimal production scheme. This model is based on the reservoir numerical simulation and optimization theory. By solving the gradient of the control variables, multiple objective strategy schemes (such as the optimal one aiming at oil production, water production and economic benefits) can be optimized according to different needs to assist the oilfield production decision. On the basis of theoretical research, this model is used to optimize the calculation and analysis of reservoir examples, and the results show that the optimal production scheme is in line with the actual oilfield, which provides theoretical and technical support for the intelligent control of oilfield development.
Overview of Earthquake Early Warning Information Release System in Fujian Province, China
Authors: Wang Qingping , Zheng Chao , Xiao Jian , Zhu Gengqing , Chen Sansan , Line Yanzhao
Published: January 2021

Earthquake early warning is a technical method that can effectively reduce earthquake disasters. In May 2018, the Fujian Earthquake Agency officially provided information services such as earthquake early warning and earthquake quick report to the public through dedicated receiving terminal and the smart phone application named “Fujian Earthquake Early Warning”. This article briefly introduces the preliminary work of the Fujian Earthquake Early Warning Data Processing System, and focuses on the construction of the Fujian Earthquake Early Warning Information Release System. Finally, taking the M6.4 earthquake in Yilan in 2019 as an example, the actual effect of the earthquake early warning information service is introduced.
Research on Mining Technology of Steeply Inclined Thin Ore Body in High-grade Content Mine
Authors: Lin You
Published: January 2021

In view of the problems of poor mining safety, low recovery efficiency, high cost, low recovery rate and few recovery options in steeply inclined, extremely unstable thin to medium-thick ore bodies, especially there are no economically feasible mining options for low-grade resources of this type of deposit Difficult problem. The paper proposes a safe, high-efficiency and low-cost mining technology suitable for steeply inclined thin ore bodies-segmented empty field subsequent filling mining method combined with 3Dmine and ANSYS to establish a FLAC3D numerical model to obtain a stope production capacity of 180t/d and a loss rate of 7.40%, the expected effect of the dilution rate of 14.96%.
On the Necessity and Strategies of Promoting the Influence of Yunnan Minority Sports Culture under the Background of "the belt and road initiative” Initiative
Authors: Wang Youfeng
Published: January 2021

Yunnan is the main area inhabited by ethnic minorities in our country. At the same time, the sports activities of ethnic minorities are also one of the important components of our Chinese culture. In order to better improve the influence ability of ethnic sports in Yunnan Province of our country, and at the same time to better promote our Chinese culture, we need to make full use of the background of the Belt and Road Initiative. Through exploring the influence of Yunnan minority sports culture, this paper puts forward how to make better use of the background of the Belt and Road Initiative to promote Yunnan sports culture.
Fluid characheristics of the Baoxingchang Cu-Mo Deposit, Yunnan Province, SW China
Authors: Dao Yan , Jian Long , Xiao Gaoqiang , Zhang Yourong , Xu Shengchao
Published: January 2021

The Baoxingchang Cu-Mo deposit is an important deposit in the Jinshajiang-Red River alkali-rich porphyry area, Western Yunnan. Fluid inclusion petrography and inclusion microscopic thermometric analysis of quartz phenocrysts in non-mineralized porphyritic granite, lamprophyre quartz veins, molybdenite quartz veins, copper-pyrite-molybdenite quartz veins, and pyrite quartz veins show that the development in primary inclusion of quartz phenocrysts and quartz veins can include vapour-rich inclusions and liquid-rich inclusions. Fluid inclusions are characterised by their medium-high temperature and moderate salinity. However, the temperature and salinity of non-mineralised quartz fluid inclusions are higher than those of quartz fluid inclusions in the mineralisation stage. Captured pressure and mineralisation depth during mineralisation reveal that the copper-molybdenum deposit is formed in hypabyssal environment, which is consistent with porphyry metalloginic systems.
Study on Multi-Phase Flow Rule of Horizontal Well in Deep Water Gas Hydrate Drilled by CT
Authors: Yang Huohai , Liu Yuhang , Ren Shirui
Published: January 2021

Natural gas hydrate is an important clean energy in the future because of its high energy density, clean and pollution-free, large amount of resources and wide distribution. Coiled tubing horizontal well drilling can ensure reservoir drilling rate, increase reservoir drainage area, improve development efficiency, and solve the problem of conventional horizontal well drilling trajectory control caused by shallow hydrate reservoir. In the process of drilling horizontal wells with coiled tubing, the gas hydrate is decomposed into gaseous gas due to the change of temperature and pressure environment. The multiphase transient flow of gas in the wellbore will affect the wellbore temperature and pressure environment and cause well control risk. The calculation model of multiphase transient flow in deep water gas hydrate horizontal wells is established. The gas distribution and migration law in the wellbore are analysed. The variation of wellbore pressure and ground flow law are mastered. The theoretical basis and construction reference are provided for deep water gas hydrate continuous horizontal wells drilling.
A Research on Warehouse Operation Optimization of Logistics Center
Authors: Feng Xiwen , Zhou Yu , Gao Mengying
Published: January 2021

This article through to A logistics center warehouse on the production line are analyzed in the value stream, together with the present situation of the company, mapping of the value stream status quo of the existing production lines, using the picture, find out the current value of the production mode in operation, then put forward to reduce or eliminate non-value added link, map out the improved value stream map, and several Suggestions for improvement are put forward.
Ballast tanks sizing and ship stability analysis
Authors: Niţă Cristian-Milică
Published: January 2021

Ships have always needed ballast to operate successfully. Ships have always carried solid ballast which was found in form of rocks, sand and many other heavy materials. These were loaded and unloaded when the cargo loading or the discharge operation was finished. This method helpeded maintaining the stability of the ship and its seaworthiness. The main idea of this paper is to realize a complex analysis of tracing the shapes and the stability of ship and sizing of ballast tanks.
Performance Evaluation of Reinforced Concrete Frame Structure
Authors: Shah Muhammad Waseem , Shah Muhammad Hammad , Scurtu Ionut Cristian , Dragan Cristian
Published: January 2021

The Earthquake in 2005 has destroyed a large part of the Khyber Pakhtunkhwa Province (Pakistan) and Kashmir which has created questions regarding the adequacy of framed structures in order to resist strong motions, as due to this earthquake many buildings were damaged badly or were devastated. In order to evaluate the framed structure’s performance under future expected earthquakes, a non-linear static analysis i.e. Push over analysis has been carried out. So for achieving our objective of analysing the framed structure’s performance under seismic loading, a 4 storey’s framed structure was selected and analysed. From the results that were obtained from this study shows that the framed structures which are properly designed under gravity will perform in a safe zone under seismic loading. Certain response parameters predicted by each pushover analysis which were obtained from Gravity & Earthquake load patterns were analysed and compared with each other for differences. The observations made from the current study clearly showed that pushover analysis results depend on three factors i.e. 1-the load path, 2-structure properties and 3-features of the ground motion. The response parameters were estimated by applying the displacement of target at the control node. The accuracy of the predictions depends mainly on the approximations involved in the theory of the procedures, structural properties and features of ground motion.
Higher Education And Sustainable Development Promotion: International Potential And Its Elaboration In Ukraine
Authors: Zinchenko V V , Boichenko M I , Popovych M D
Published: January 2021

This paper reveals the theoretical and conceptual foundations of the issues of global institutional transformations, transformative strategies of higher education, quality issues, personality-oriented strategies, multiculturalism, communication strategies of higher education. It presents the level and quality of internationalization of higher education in Ukraine, the formation of a worldview basis to stimulate and ways to ensure sustainable development of society, to increase the social responsibility of higher education and to strengthen its functional efficiency for society. In higher education now it is lack of basic systemic knowledge about sustainable development, its aims and ways. The environmental issues are quite often misevaluated as relevant only to natural sciences, social and humanitarian tasks of sustainable development are underestimated. In many countries, especially from former colonial or quasi-colonial status ones, the success of sustainable development policy is crucial dependent on recognition and acceptance of this policy by new generation of citizens. Students as an advanced and socially active part of new generation are the target audience for sustainable development enlightenment. In Ukraine these problems are additionally determined by low participation in international projects and some bureaucratization of such participation.
Analysis of the placebo response to the therapeutic environment
Authors: Korzh Oleksii , Korzh Iryna
Published: January 2021

Placebo is critical for evaluating medical interventions, but it’s also clear that the biology underpinning the placebo effect in humans could have significant clinical and societal impacts. Placebo effects, real responses to false cues, potentially stand at odds with the view that, for adaptive reasons, organisms respond only to true environmental cues. In placebo effects, phenotypic responses are seen in the absence of a biologically active agent. The reason for the increase in the placebo response is largely unknown, but several attempts have been made to overcome this problem. How placebos work is still not quite understood, but it involves a complex neurobiological reaction that includes everything from increases in feel-good neurotransmitters, like endorphins and dopamine, to greater activity in certain brain regions linked to moods, emotional reactions, and self-awareness. All of it can have therapeutic benefit. Reacting to a placebo is not proof that a certain treatment doesn’t work, but rather that another, non-pharmacological mechanism may be present. If placebo responses seen in humans are the result of phenotypic plasticity, then placebo-like effects should be observable in other species—particularly in cases where the environment has been altered to disrupt its reliability. This is the case, and placebo-like effects are seen in a variety of model systems.
Wind energy conversion within agricultural farm using vertical axis turbines of optimized SAVONIUS type
Authors: Scheaua F D
Published: January 2021

Wind force is a considerable resource on the basis of which a significant amount of energy can be obtained, necessary in an agricultural farm that is not connected to the energy distribution network. For this case a low capacity wind turbine can be used as a practical solution, which has the possibility to supply the necessary amount of energy within the farm. The solution is represented by the use of a vertical axis wind turbine with that has component an improved SAVONIUS type rotor. Constructive and energy performance aspects of this rotor type are presented based on studies conducted by various researchers over time, being presented the optimal model to be used in the agricultural farm for energy generation. Values of the energetic performances obtained from analytical but also experimental studies of the optimized models of the turbine rotor with vertical axis that works on the Savonius principle are presented. It is also emphasized the advantage of using this solution in terms of protecting the environment by avoiding fuel burns to obtain the energy needed on the agricultural farm.
Synergy of QFD and FMEA methods to improve workplaces in aircraft wire manufacturing
Authors: Ya Dmitriev A , Mitroshkina T A , Russkikh I V
Published: January 2021

The integration of QFD and FMEA methods for improving workplaces is considered. The use of priority calculations in the QFD method in matrix form facilitates integration with the FMEA risk analysis method. An example is given of improving the work places of supporting operations in the manufacture of dual-use wire & cable products. It is proved that the direction of improving the activities and workplaces in the enterprise management system, determined on the basis of the proposed synergistic FMEA and QFD methods, is an innovative way of developing a wire&cable manufacturing.
Numerical simulation of splashing landing gear on an amphibious aircraft air cushion
Authors: Fevralskikh A V
Published: January 2021

The paper presents the basics of the methodology for modeling the spatter formation of landing gear on an amphibious aircraft hovercraft based on the numerical solution of the Navier-Stokes equations for a two-phase incompressible flow with a free interface (VoF approach) and the disperse medium motion equations (DPM approach). The results of numerical simulation of the water jet collapse in the transverse air flow in comparison with the experimental results are given, as well as recommendations and results of application of numerical simulation in forecasting the air cushion splash formation. The results of the simulation are in good correspondence with the results of the experiments published earlier, which demonstrates the prospects of applying the technique in the development and design of new landing gear layout solutions on an amphibious air cushion aircraft.
About the equilibrium of airship in the parking lot
Authors: Grumondz V T , Morozov N I , Htang Om Moung
Published: January 2021

The paper discusses the questions of constructing a mathematical model of the equilibrium of an airship in a parking lot with a two-cable parking scheme and also the problem of calculating forces acting on the elements of the cable system that holds the airship.
Nonlinear stochastic estimation of altitude and vertical flight speed in real time
Authors: Kharkov V P , Korsun O N , Pravidlo M N , Htang Om Moung
Published: January 2021

The optimal algorithm for calculating the altitude and vertical flight speed of an aircraft, which is based on complex processing of information from static pressure sensors, outdoor air temperature, and vertical acceleration is described. Information processing is performed using nonlinear estimation methods. Adaptive properties of the estimation algorithm are achieved by including into the state vector the parameters that characterize the properties of sensors and static pressure transmission paths.
Hierarchy analysis for monitoring the uniformity of measurements system
Authors: Krasavin I V , Yashin A V , Tulekbaeva A K
Published: January 2021

An approach to monitoring the state of the system for ensuring the uniformity of measurements and forecasting its state, based on the method of hierarchy analysis, is proposed. A decomposition of the system for ensuring the uniformity of measurements is proposed, the further processing of the judgments sequence for decision-making based on paired comparisons, is discussed. The processing of experts judgments in order to obtain a generalized judgment is described.
Improving the quality of FDM 3D printing of UAV and aircraft parts and assemblies by parametric software changes
Authors: Zagidullin R S , Zezin N I , Rodionov N V
Published: January 2021

The article analyses and presents the classification of defects in parts obtained by FDM 3D printing technology. A fault tree has been built for the functional and structural analysis of the factors causing defects in parts produced by FDM 3D printing technology. Using the constructed fault tree, a method is proposed for eliminating defects in parts obtained by FDM 3D printing technology, based on parametric changes in software.
In vivo organized neovascularization induced by 3D bioprinted endothelial-derived extracellular vesicles
Authors: Maiullari Fabio , Chirivì Maila , Costantini Marco , Ferretti Anna Maria , Recchia Sandro , Maiullari Silvia , Milan Marika , Presutti Dario , Pace Valentina , Raspa Marcello , Scavizzi Ferdinando , Massetti Massimo , Petrella Lella , Fanelli Mara , Rizzi Marta , Fortunato Orazio , Moretti Fabiola , Caradonna Eugenio , Bearzi Claudia , Rizzi Roberto
Published: January 2021

Extracellular vesicles (EVs) have become a key tool in the biotechnological landscape due to their well-documented ability to mediate intercellular communication. This feature has been explored and is under constant investigation by researchers, who have demonstrated the important role of EVs in several research fields ranging from oncology to immunology and diagnostics to regenerative medicine. Unfortunately, there are still some limitations to overcome before clinical application, including the inability to confine the EVs to strategically defined sites of interest to avoid side effects. In this study, for the first time, EV application is supported by 3D bioprinting technology to develop a new strategy for applying the angiogenic cargo of human umbilical vein endothelial cell-derived EVs in regenerative medicine. EVs, derived from human endothelial cells and grown under different stressed conditions, were collected and used as bioadditives for the formulation of advanced bioinks. After in vivo subcutaneous implantation, we demonstrated that the bioprinted 3D structures, loaded with EVs, supported the formation of a new functional vasculature in situ, consisting of blood-perfused microvessels recapitulating the printed pattern. The results obtained in this study favour the development of new therapeutic approaches for critical clinical conditions, such as the need for prompt revascularization of ischaemic tissues, which represent the fundamental substrate for advanced regenerative medicine applications.
Prediction of coefficient of friction for different surface topography in mixed-EHL regime
Authors: Prajapati Deepak K
Published: January 2021

The operation of concentrated contacts observed in gearboxes, rolling element bearings, and cams/followers of valve etc of several machinery and mechanical systems in the mixed-elastohydrodynamic lubrication (mixed-EHL) regime is one of the key reasons for occurring the incident of surface contact fatigue. Due to significant asperity interactions in the mixed-EHL regime, the friction coefficient is profoundly affected by the surface topography of mating bodies. Thus, exploration of role of surface topography on coefficient of friction in mixed-EHL regime is a vital issue. This work proposed a model for investigating the effect of different surface topography on the coefficient of friction of concentrated contacts under mixed-EHL regime. The results achieved with the proposed mixed-EHL model are validated by performing rolling/sliding experiments. A good match is found between experimental and predicted coefficient of friction. Based on the investigation, it is also concluded that a surface with small fraction of summits can operate in boundary lubrication regime at high-load and low-speed conditions. A surface with lower correlation length exhibit elastic-plastic deformation at higher coefficient of friction. High value of friction coefficient is observed for rough surface (S
q
 > 0.5 μm) at even higher rolling speed (1 m s−1).