bluuebunny/crossref_metadata_2025 huggingface dataset:
The sustainability of rainwater harvesting for supplying domestic water demand in Yogyakarta City
Authors: Arijuddin Basyar I. , Purnama Ig. L. Setyawan , Nurjani Emilya
Published: January 2019

Yogyakarta city has a problem of water resources management along with the rapid development in this region. Rainwater harvesting (RWH) can be an alternative choice in urban water resources management. This study aims to determine the best RWH scenario as a sustainable water supply to meet domestic water demand in Yogyakarta City. The method used is the Sustainability Index with 3 parameters including reliability, resilience and vulnerability. Each parameter is a derivative of a water balance simulation of the RWH system using the data range in the period 2006–2015. This study compares the percentage of roof usage in the RWH system and the level of domestic water demand. The results of this study indicate that the RWH scenario by utilizing 50 %–75 % of the roof area can be ideally meet up to 80 % of domestic water needs in Yogyakarta City. RWH scenario with 100 % roof usage can meet all domestic water needs well. This study shows that the RWH system can have a positive impact on the management and sustainability of water resources in Yogyakarta City.
The nature of carbon flux in various ecosystem types in the Biduk-Biduk Karst Region, Berau District, East Kalimantan
Authors: Danardono Danardono , Haryono Eko , Widyastuti Margareta
Published: January 2019

Biduk-Biduk Karst Region has great potential to absorb and store organic carbon in vegetation and soil as well as to absorb inorganic carbon through the process of dissolution. The area has important economic value in supporting the REDD Program in Berau District. The purpose of this study is (1) to identify the amount of carbon stocks in various ecosystems; and (2) to identify the amount of carbon uptake in various ecosystems in the study area. Carbon stocks are computed based on four carbon sinks, i.e., above ground biomass, underground biomass, litter, and soil organic matter using the standard measurement method of SNI 7724: 2011. Carbon sequestration is calculated based on the input of carbon from the atmosphere to ecosystems through litter fall and karstification process and the output of carbon from the ecosystem to the atmosphere through soil respiration. Litter fall is measured using the litter trap method. Karstification is measured with standard limestone tablet method. Soil respiration is calculated with the closed chamber method. The results show that the ecosystems in the Biduk-Biduk Karst Region have a potential carbon stock of 4,800.92 tons/ha with the largest value in the secondary tropical forest of 732.6 tons/ha and the lowest value in the teak forest plantation of 358.2 tons/ha. Ecosystems in the Biduk-Biduk Karst Region have a potential carbon sequestration of 37.33 tons/ha/year with the largest contribution in the primary tropical forest of 7,63 tons/ha/year.
Relation of lineaments and volcano-stratigraphy of tertiary volcanic rocks in Kulon Progo Mountains Area, Yogyakarta-Indonesia
Authors: Widagdo Asmoro , Pramumjoyo Subagyo , Harijoko Agung
Published: January 2019

The structural lineaments developed in the Kulon Progo Mountains, which is mainly composed of Tertiary volcanic rocks. The direction and distribution of these lineaments density differs from one area to another. This research was conducted to reveal the geological factor of controlling the variation of existing lineaments density. Lineaments delineation is done on the whole area on the satellite image of Kulon Progo Mountain area. From the lineaments map is then made a lineaments density variation map. Lineaments density variation map that are overlaid by volcanic rock distribution, based on the results of field studies, will result in a relationship between the geological structure density and the existing rock types and facies of volcanic rocks. The result of alignments density analysis shows high density values 3-6 km/km2 especially located at proximal volcanic rock facies. Low density values of 1-3 km/km2 are mainly located in medial and distal volcanic rock facies.
Nett Present Value (NPV) analysis for projection of feasibility of Coastal Sand Dune Tourism in Parangtritis Village
Authors: Dwiputra Dicky Satria , Rahmanu Yan Abdi , Tofani Atikarosa Sih , Naufal Muhammad , Arsy An Nisa Khansa Sitostratufana , Bariq Jundi Muhammad , Putri Ratih Fitria
Published: January 2019

Sand dune in Parangtritis Village has a speciality of being formed in humid climates (tropical). The initiation of Barchan Sand Dune as a new tourism based on eco-tourism has to consider many aspects to maintain sustainability of sand dune. It needs some information on economic valuation to determine the capacity of tourism objects as a consideration of sand dune's sustainability. The purpose of this research is to know the projection of Barchan sand tourism's feasibility until 2045. The research method is the economic valuation approach by calculating Nett Present Value (NPV) as the analysis (cost) and the benefit earned by Barchan Sand Dune Tourism. The method of economic valuation is chosen because it is able to convert ecosystem services into currency value (IDR) so that it can be a valid comparator. The hypothesis in this study states that the feasibility of Barchan Sand Dune Tourism will increase until certain year, but the increased feasibility will cease in a certain year and decrease in the following year. The results are obtained based on the calculation of Nett Present Value (NPV), it shows positive value so that Barchan Sand Dune Tourism is feasible to continue until 2045 with estimated profit reached IDR648,000,000. The calculation results show a decrease in the level of tourism efficiency in 2017. The level of efficiency can be increased again through management optimization based on the characteristics of the tour, which are something to do, something to see and something to buy at Sand Dune Barchan.
Temporal-spatial analysis in accordance with gender development index on the improvement of the quality of women in Central Kalimantan Province
Authors: Yulianto Ari , Kusumaningrum Prameswari Budi , Daniati Alviyah , Nurvitasari Shinta , Putri Ratih Fitria
Published: January 2019

Gender Development Index (GDI) is the index introduced by UNDP to measure the quality of human resources with respect of gender aspect. The objective of this research is to identify the influence of health, education, and economy to the women as well its distribution to map the areas prioritized for gender inequality alleviation. The methodology of this research employs quantitative descriptive analysis, spatial comparative analysis, and temporal comparative analysis. The result shows that the gender equality achieved by Central Kalimantan was GDI far below the national average, hence there needs to be efforts to push gender equality in main priority districts, such as Katingan, Murung Raya, and Barito Utara. The influence of health factor, represented by Life Expectancy Rate is more significant compared to other factors such as education and economy. The raise of total health facilities impact to the decreased of women mortality rate as the key for good women contribute into Gender Development Index.
Hypoglycaemic effect of coixan from Coix seeds on mice
Authors: Yin Yanan , Yang Weiwei , Jiao Yingliang , Yang He , Li Xinglin
Published: January 2019

Diabetes is an endocrine system disease characterized by high morbidity, high prevalence, and high mortality. Although the traditional medicine for treating diabetes has a good effect, its side effects are also large. Traditional Chinese medicine has also achieved good therapeutic effects in the treatment of diabetes, and the side effects of Chinese medicine are small. Coix is a medicinal and edible plant. It is used as food and medicine alone or in combination with other herbs in the early days. Its seeds have become one of the most popular Chinese herbal medicines. The coixan was extracted from Coix seed, and it was administered to diabetic mice. After five weeks of treatment, it was found to have some role in hypoglycemic. This study provides a good application prospect for Chinese medicine treatment of diabetes.
Analysis of Chinese Children’s Nutrition Health Situation and Influencing Factors
Authors: Yi Li
Published: January 2019

Using the China Health and Nutrition Survey (CHNS), this paper analyses that height for age (HAZ) of children from urban area is higher than that of those from rural areas on average and the height varies among rural children. Gender also has similar impact on children’s height, namely, HAZ of girls is lower than that of boys. In addition, only children has better nutrition health than others and living with parents or not has great impact on children’s nutrition health as well.
Effect of Substrate Ratios and the Species of Sugar on the Antioxidant Activity of Glycosylated Products of the Rana Debris Collagen Peptide
Authors: Kang Naixin , Song Hongxin , Zhang Wenyu , Zhao Jing , Zhang Menghan , Xiong Wenxin , Xi Chunyu
Published: January 2019

The active peptide (molecular weight < 3500 Da) of the enzymatic hydrolysis from Rana debris is used as a raw material of glycosylation. The peptide can be affected by environmental factors, such as pH and temperature, which can destroy structural and functional properties, so the peptide is usually modified by glycosylation. To investigate the effects of glycosylation on the antioxidant activity of Rana Debris Collagen Peptide (RDCP), glycosylated compounds were prepared using different ratios of RDCP and xylose or glucose by the Maillard reaction. The results indicated that the peptide-xylose compound (PXC) showed higher antioxidant activity than the peptide-glucose compound (PGC), and RDCP and xylose heated at a ratio of 1:4 showed good antioxidant properties. The correlation between the glycosylation degree and antioxidant activity was strong. These results indicated that glycosylation can enhance the antioxidant activity of RDCP. Such glycosylated products can be used in the field of food research.
Evaluation of antioxygenic property of honey based on electrochemical sensing method
Authors: Wu Mengyao , Fu Li , Zheng Yuhong
Published: January 2019

Antioxidant capacity of antioxidants is very important in food science. In this paper, we proposed a fast and low-cost antioxidant capacity evaluation method based on an electrochemical detection platform. Silver ions and chitosan were used to synthesize a hydrogel as the electrochemical detection platform. The depolymerization of hydrogel caused by Fenton solution can be hindered by the antioxidants. Therefore, the electrochemical signals of silver ions can be used to measure the antioxidant properties of honey. Jujube honey, linden honey, locust honey and wattle honey were submitted to evaluation. Results indicates the antioxidant capacities of the four honeys follows following order: Jujube honey > linden honey > locust honey > wattle honey.
Ar plasma jet generation and its application for water and surface sterilization
Authors: Feng Fada , He Xianjun , Liang Yingying , Yang Fengzhu , Wang Fushan , Yang Yue , Liu Tiejian
Published: January 2019

Microorganisms are widely distributed in the living environment of human, animals and plants. Some of the microorganisms are harmful for their pathogenic effects. Non-thermal plasma technology, especially, the atmospheric pressure plasma jet, is considered to be one of the promising technologies for sterilization. This work proposes a double-dielectric barrier discharge reactor for Ar plasma jet generation. Charteristics of discharge and temperature thermogram of plasma jet are investigated by the means of U-P curve and infrared image, respectively. Performance of the plasma jet is evaluated by surface and water sterilization. The results show that, Ar plasma jet is generated stable with double-dielectric barrier discharge. The length of plasma jet increases as the applied voltage, frequency or gas flow increased, but the plasma jet generation can be restricted in high frequency or gas flow. For E. coli in the water and surface, high sterilization efficiency is observed for a short time treatment by Ar plasma jet.
Curing Experiments Researching on Waste Oil-base Shale Gas Drilling Mud
Authors: Zhan Xinyuan , Wang Xiang , Wang Li’ao , Xu Tengtun , Hu Chaochao , Wang Lei , Song Xue
Published: January 2019

Curing research on waste oil-base shale gas drilling mud was performed for optimal additions matching. Destabilizing experiments on waste drilling mud demonstrated that Aluminum potassium sulfate (KAl(SO4)2) played a best role of destabilizing effects when compared with FeCl3 and AlCl3 based on demulsification mechanism about oil-in-water type. Aluminum potassium sulfate emerged an impact influence on curing effects simultaneously when compared to sodium silicate, alumina, lime and complex Portland cement. Orthogonal test on curing waste drilling mud revealed that the optimal operation conditions of handling waste drilling mud was 4% aluminum potassium sulfate, 4% sodium silicate, 4% alumina, 4% lime and 16% complex Portland cement. Under this condition, unconfined compressive strength of the curing product was 1.80MPa, and lead leaching concentration cannot be detected after 7d maintenance. The curing mechanism was mainly the encapsulation of C3S and solid waste contaminated by mineral oil can be efficiency treated after breaking the interface of oil-in-water type.
Continuous cleaning process of molten copper slags in a channel reactor under the external electric field
Authors: Zhang Mingjun , Fu Li , Zhang Huaiwei
Published: January 2019

Continuous cleaning process of the molten copper slags in a channel reactor under a vertical electric field is proposed. The copper-matte settling velocity under the vertical electric field is much faster than that only under the gravity in the molten slags, and the electric field can also accelerate the magnetite reduction. Cu content in the slag can fall below 0.35 wt. % during the continuous cleaning process, which exceeds much more existing slag treatment process. In addition, the behaviours of some other heavy metal elements in the molten slags during the continuous process are also discussed.
Study on color ink-jet printing paper coating with nano-SiO2 as pigment
Authors: Li Jiehua , Zhao Chuanshan , Han Wenjia , Jiang Yifei
Published: January 2019

With many years of research, color ink-jet printing technology has reached the requirements of color ink-jet printing. The significance of this experiment is to find a suitable method to improve the quality of color ink-jet printing paper. In this work, the dispersion effect and types of sodium polyacrylate (PAAS) on nano-SiO2 solution are discussed, and the most suitable PAAS dosage is selected. When the dosage of PAAS is 8%, the dispersibility of nano-SiO2 solution is much better, with an average color density of 1.60, a gloss of 59% and an ink absorption value of 10.2 cm. Adhesives also have a great influence on color ink-jet printing paper. When the amount of PVA is 30% of nano-SiO2, the average color density is 1.62. Glossiness and ink absorption are also the best.
Environmental Art Teaching Equipment and Program Research
Authors: Zou Na
Published: January 2019

Once the “Internet +” action plan is proposed, all walks of life actively take measures to integrate with the Internet. Higher education should also meet the requirements of the times to achieve new developments in education and teaching. Under the new situation, the education of environmental art design in colleges and universities should not only adopt the information-based teaching tools, but also take effective teaching new measures on the basis of the specific characteristics of the subjects, and turn passive learning into active learning to improve the teaching level and quality as well as cultivate innovative, skilled and applied talents that meet the needs of society.
Establishment and Application of CIGS Photovoltaic Building Family Library Based on BIM
Authors: Fan Xinyu , Qin Wenjun , Li Chenqi , Zhang Feiyu
Published: January 2019

With the development of the times, environmental pollution and energy consumption have attracted more and more human attention. The integration of photovoltaic buildings has become an important measure for the sustainable development of buildings.Combining CIGS (copper indium gallium selenide) PV modules with BIM technology for parameter family modeling, applied in BIPV (Building Integrated Photovoltaic) to improve design quality, reduce design errors, acquire and analyze Engineering volume data, and provide technical support for the entire construction process.
Lighting control method based on the natural illumination model and the personnel movement model
Authors: Fang Qiansheng , Tu Chang , Xie Chenlei
Published: January 2019

Since the light control module and communication module connected by the CAN bus, the traditional and centralized lighting control system has a high cost of maintenance. Meanwhile, the connecting way relied on the CAN bus is hard to achieve energy saving. It’s entirely possible to improve the efficiency by using the design of distributed non-central platform, we proposed a new lighting control simulation system based on the natural illumination model and the personnel movement model. Considering that all influencing factors of the real light environment, this paper calculated the illumination of light source on the working surface and the natural illumination in the room by the method of azimuth coefficient and boundary integral. Furthermore, in order to decrease energy consumption, we introduced the Markov transfer matrix to describe the position changes of staff to control the light intensity of the office. Though the simulation results, the proposed lighting control system in this paper is demonstrated that can save more lighting energy consumption in comparison with traditional and centralized lighting control system.
Optimal layout of pressure monitoring points in water supply network based on Optics
Authors: Xie ChenLei , Fang QianSheng , Zhang HongYan , Zhang JiXin
Published: January 2019

It is necessary to monitor the pressure in the networks in real time, when we face the problem of pipe burst and leakage in urban water supply network. Therefore, it is particularly important to arrange pressure monitoring points in appropriate places in the pipeline networks. The pressure monitoring point layout is often based on similar degree of the node pressure data in the current stage. A method of optimal pressure monitoring point location in the urban water distribution networks was proposed in this paper. Since the above method did not consider spatial properties of network node. The original feature matrix data is constructed by acquiring the spatial attributes of the pressure monitoring nodes and calculating the non-spatial attributes of the nodes. The original feature matrix data will be normalized. Then the Optics clustering algorithm is used to cluster the normalized node feature matrix data to determine the location and number of pressure monitoring points in monitoring area of urban water distribution networks. Experimental results show that the method effectively ensures that the pressure monitoring points can grasp the pressure information of the whole water supply network more comprehensively and rationally, improves the economy of the pressure monitoring points layout, and provides good guidance for the actual layout of pressure monitoring points in municipal water distribution networks.
Landscape Design of the University New Campuses Based on Regional Characteristics——Using Fengxian New Campus of East China University of Science and Technology as an Example
Authors: Feng Lu
Published: January 2019

In the past 40 years of reform and opening up, China's higher education and campus construction have made historic achievements. This paper reviews the history of this process in the 40 years, while summarises the characteristics and requirements of current new campus by comparing multiple new campuses in china. The paper uses East China University of Science and Technology as an example, to analysis the problems of neglecting the regional characteristics and far-fetched embodiment of university culture. This paper puts forward the concept of using regional characteristics to strengthen university culture, and unfolds in natural features, evolution process and farming habits within two specific plots.
Activity Characteristics and Safety distance of Gaoliying Ground Fissure in Beijing
Authors: Wang Haigang , Qin Tongchun , Guo Haipeng , Zhu Juyan , Wang Yunlong , Zang Xisheng , Li Xia
Published: January 2019

In all ground fissures in Beijing, Gaoliying Ground Fissure has characteristics of highly activity, and it cause serious damages on constructoins. With the distribution as well as the development of land subsidence and the change of the groundwater level, a series of work has been conducted to explain the mechanism of the formation of Gaoliying Ground Fissure. For example, field damage investigations and trench observations were used to define the affected distance of ground fissure; three-dimensional deformation was monitored to determine active characteristic of ground fissure. This paper points out that Gaoliying ground fissure is controlled by Huangzhuang-Gaoliying Fault, which mainly moves in the vertical direction. The rapid decrease of the ground water level greatly increases the development of ground fissure. The distance of damaged zones affected by ground fissure in the hanging-wall of the fault reaches 49.5m, and the distance of damaged zones in the footwall of the fault is 17.5 m. A suggested safety distance of type-one and type-two buildings is 100 m. For type-three buildings, the suggested safety distance is 80 m.
Experimental study on the control effect of ground stress on the damage of coal seam mining floor
Authors: Tian Gan , Hu Weiyue
Published: January 2019

In order to study on mechanism of in-situ stress control on the coal floor damage during deep coal seam mining, the internal relationship among ground stress, mine pressure and floor water inrush was analyzed base on the increasing distribution rule of ground stress with the increasing depth of stratum. It is shown that the stress on the deep coal seam has obvious control effect on the depth of the floor damage and failure through the experimental study and the statistical analysis of the measured data of the mining damage depth of the coal seam floor. And the calculation formula for the depth of the floor failure in the deep seam mining was put forward.
Synthesis and Characterization of Nickel-doped Manganese Dioxide Electrode Materials for Supercapacitors
Authors: Dong Jie , Hou Zhenzhong , Zhao Qiuli , Yang Qinghao
Published: January 2019

Nickel-doped manganese dioxide (Ni-MnO2) synthesized by sol-gel method has been used as an electrode material for supercapacitors. The structure and electrochemical properties of the samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectrometry (EIS). Results showed that the nickel-doped manganese dioxide sample exhibited irregular particles with the diameter of about 500 nm. The crystallographic structure of MnO2 was the poorly crystallized γ-MnO2. The doping ratio had a great influence on the electrochemical properties of the materials. When the molar ratio of Ni/Mn was 3/100, the specific capacitance of Ni-MnO2 achieved to 252.61 F/g. After 2000 charge/discharge cycles, the specific capacitance of Ni-MnO2 was still maintained at 74.36%, which was attributed to its excellent cycling stability.
Quantitative Evaluation of Plant Priority Protection in Liangzi Lake Wetland Nature Reserve
Authors: Zhang Xinyang , Cai Xiaoyuan
Published: January 2019

Based on the field survey data and relevant literatures, the evaluation index system of plant priority protection, which consists of threatened coefficient, genetic coefficient and species coefficient was established. Quantitative study and comprehensive evaluation of plant resources in Liangzi Lake Nature Reserve were carried out, and protection levels were classified. The results showed that there were 254 plant species in nature reserve, including 18 endangered species, 46 vulnerable species, 76 lower risk species and 114 safety species. The coefficients of threatened, genetic and species were analyzed and calculated by the indexes and proportion weights. The priority protection order of plants was determined, including 12 species of the first class conservation, 18 species of the second class conservation, 33 species of the third class conservation and 191 species of the delayed conservation. The corresponding protection suggestions were put forward. The purpose is to provide theoretical guidance for plant protection work and to help protect biodiversity of Liangzi Lake Nature Reserve.
Simulation evaluation of groundwater resources in southeastern Bosten Lake based on GMS
Authors: Shi Qiang , Yan Changhong , Yu Peng
Published: January 2019

Bosten Lake is located in Yanqi Basin of Xinjiang. A working area in the southeast of China is influenced by the regulation of Bosten Lake, and the transitional zone of climate in the north and south of Xinjiang, forming a climate of large evaporation, dry and little rain, and groundwater is a very important fresh water resource. In order to find out the composition of groundwater resources in the working area, the groundwater steady flow model is established by using the data of borehole, well, pumping test and so on, and the groundwater resources in this area are evaluated. The groundwater exploitation mode in the simulated area is evaluated. The results show that: the exploitable groundwater resources in the simulated area is about 22.045 million m3/a. Changing the mode of agricultural water use under the existing groundwater equilibrium condition can effectively reduce the waste of groundwater resources.
A study on heavy metal sorption properties of intestinal microbiota in vitro
Authors: Sizentsov Alexey , Sizentsov Yaroslav , Kvan Olga , Salnikova Elena , Salnikova Valeriya
Published: January 2019

Water and soil pollution by heavy metals has led to their accumulation in the ground and waters, to a sharp decline of ecosystem biopotential, and to foodstuff contamination, resulting in internal pollutions in bodies of humans and animals with food, air, water. In this regard, the purpose of our study was to examine the impact of heavy metals on the growth of representatives of rats’ intestinal microbiota and to estimate sorption characteristics of these microorganisms. The research was conducted in three stages: i) a study of essential and xenobiotic elements’ biotoxicity; ii) their impact on the growth of the microbiota in periodic cultivation; and iii) studying bioaccumulative characteristics. In the research, we discovered that all investigated organisms had pronounced resistance to lead and iron, which was confirmed by the results of the evaluating the impact on the growth and the accumulating characteristics of the studied microorganisms (more than 50%). The strain of E. faecium has the most pronounced sorption characteristics – its level of accumulation amounted for iron –63.3%, lead – 61%, zinc – 38.4%, copper – 11.4%, and cadmium – 33.2%, minimum values were obtained in samples of L. acidophilus, which sorbed these elements in concentrations of 46.2%, 42.3%, 10.3%, 3.8%, and 5.3%, respectively.
Identification of factors affecting sustainable development of renewable energy sources in transport
Authors: Eder Leontiy , Filimonova Irina , Nemov Vasily , Komarova Anna , Kozhevin Vladislav
Published: January 2019

At present motor transport is one of the key components of the formation of a long-term policy of sustainable economic development. Analysis of the structure of energy consumption in motor transport is necessary for better understanding of the factors that affect the increase in the share of renewable energy sources in transport and the effectiveness of specific support measures for the transition to vehicles with minimal or no greenhouse gas emissions. Models of pooled regression, regression with random and fixed effects were built in order to reveal the influence of the chosen factors on the share of renewable energy and electricity in the structure of energy consumption by vehicles. The results of evaluation for 31 European countries in the 2005-2017 showed that the criterion, which allows identifying groups of countries, is the volume of environmental transport taxes per vehicle unit. Countries with higher taxation volumes has such influencing factors as Corruption Perceptions Index, Energy productivity, Total environmental taxes per capita and Employment in high- and medium-high technology manufacturing sectors and knowledge-intensive service sectors. Consumption in countries with lower tax differentiation is influenced by index of research intensity, Corruption Perceptions Index and Shares of environmental and labour taxes.
Analysis on building industry CO2 emission in Shanghai
Authors: Guo Hao , Wang Qingcheng
Published: January 2019

With the economic development in Shanghai, a lot of energy has been consumed in the building industry, and is accompanied by a great amount of carbon emissions. Based on the data of energy consumption in the two stages of the building materials production and construction process in Shanghai, a calculation model of CO2 emissions was created, total CO2 emissions have been evaluated during recent ten years, and CO2 emissions influencing factors was identified in each stage. The research results show that CO2 emissions in the stage of building materials production, account for more than 90% of total CO2 emissions, mainly traced from cement, iron and steel industry, and have greater potential for energy conservation and emissions reduction.
Simulation of CO and CO2 emissions in model combustion chamber based on the combination LES and Reactor Network model
Authors: Matveev S.S. , Idrisov D.V. , Gurakov N.I. , Gangisetty Gopalakrishna , Zubrilin I.A. , Matveev S.G. , Shchepakina E.A.
Published: January 2019

Air pollution is a major concern of recent decades, which has a serious toxicological impact on human health and the environment. It has a number of different emission sources, but one of the main sources of environmental pollutions is transported systems, in particular aviation gas turbine engines (GTE). Currently environmental issues of GTE are mainly solved by using semi-empirical techniques and experimental refinement of prototypes. In this paper we presented an algorithm for simulating the emission of CO and CO2 in a model combustion chamber under various initial conditions and compared the results, validated with an experimental data.
Heavy metal contamination in bottom sediments of saline endorheic lakes of Kulunda and Barabinsk steppes (Western Siberia, Russia)
Authors: Kolpakova Marina
Published: January 2019

The article presents the results of assessment of heavy metals contamination in bottom sediments of saline lakes located on the territory of Kulunda and Barabinsk steppes of Western Siberia, Russia. The territory is characterized by large amount of lakes (more than 5000), including the Chany lake, which is the biggest lake of south of Western Siberia. By calculation the geochemical parameters, such as Enrichment factor, Contamination factor, Geoaccumulation index, Pollution load index, the common level of bottom sediments was classified as unpolluted. However, in comparison with average level of bottom sediment on that territory the lake sediments are enriched with the following elements: Sr> Rb> Zn> V> Cr> Ni> Cu> As> Pb> Th> U> Mn> Fe> K> Ti.
Impact of H.E.S.S. Lidar profiles on Crab Nebula data
Authors: Devin Justine , Bregeon Johan , Vasileiadis Georges , Gallant Yves
Published: January 2019

The H.E.S.S. experiment in Namibia is a high-energy gamma-ray telescope sensitive in the energy range from 30 GeV to a several tens of TeV, that uses the atmospheric Cherenkov technique to detect showers developed within the atmosphere. The elastic lidar, installed on the H.E.S.S. site, allows to reduce the systematic errors related to the atmospheric composition uncertainties thanks to the estimation of the extinction profile for the Cherenkov light (300-650 nm). The latter has a direct impact on the reconstructed parameters, such as the photon energy and the source flux. In this paper we report on physics results obtained on the Crab Nebula spectrum using the lidar profiles obtained at the H.E.S.S. site.
The use of aerosol data in Auger Fluorescence Detector analysis
Authors: Dawson Bruce R.
Published: January 2019

The Pierre Auger Observatory’s Fluorescence Detector (FD) consists of 27 telescopes arranged in four sites around the perimeter of the 3000 square kilometre Surface Detector (SD). Cosmic ray extensive air showers are viewed via the nitrogen fluorescence light they induce in the atmosphere. Careful treatment of light attenuation processes must be made, especially given that some showers are viewed at distances in excess of 30 km. Of particular importance is the attenuation due to scattering by aerosol particles, a challenging topic given that aerosol concentrations can vary on time-scales of hours. At the Auger Observatory, the vertical distribution of aerosols is measured hourly with a series of bi-static lidar systems (consisting of central laser facilities and each of the FD sites), and three times per night with a Raman lidar system. In this contribution we describe the use of aerosol profiles in the analysis of air shower data, in particular in the estimation of the cosmic ray primary energy, and the depth of shower maximum, Xmax. We also demonstrate how statistical and systematic uncertainties in the aerosol concentrations propagate through to a contribution to energy and Xmax uncertainties.
New precise measurements of muonium hyperfine structure at J-PARC MUSE
Authors: Strasser P. , Abe M. , Aoki M. , Choi S. , Fukao Y. , Higashi Y. , Higuchi T. , Iinuma H. , Ikedo Y. , Ishida K. , Ito T. , Ito T. U. , Iwasaki M. , Kadono R. , Kamigaito O. , Kanda S. , Kawagoe K. , Kawall D. , Kawamura N. , Kitaguchi M. , Koda A. , Kojima K. M. , Kubo K. , Matama M. , Matsuda Y. , Matsudate Y. , Mibe T. , Miyake Y. , Mizutani T. , Nagamine K. , Nishimura S. , Ogitsu T. , Saito N. , Sasaki K. , Seo S. , Shimizu H. M. , Shimomura K. , Suehara T. , Tajima M. , Tanaka K. S. , Tanaka T. , Tojo J. , Tomono D. , Torii H. A. , Torikai E. , Toyoda A. , Tsutsumi Y. , Ueno K. , Ueno Y. , Yagi D. , Yamamoto A. , Yamanaka T. , Yamazaki T. , Yasuda H. , Yoshida M. , Yoshioka T.
Published: January 2019

High precision measurements of the ground state hyperfine structure (HFS) of muonium is a stringent tool for testing bound-state quantum electrodynamics (QED) theory, determining fundamental constants of the muon magnetic moment and mass, and searches for new physics. Muonium is the most suitable system to test QED because both theoretical and experimental values can be precisely determined. Previous measurements were performed decades ago at LAMPF with uncertainties mostly dominated by statistical errors. At the J-PARC Muon Science Facility (MUSE), the MuSEUM collaboration is planning complementary measurements of muonium HFS both at zero and high magnetic field. The new high-intensity muon beam that will soon be available at H-Line will provide an opportunity to improve the precision of these measurements by one order of magnitude. An overview of the different aspects of these new muonium HFS measurements, the current status of the preparation for high-field measurements, and the latest results at zero field are presented.
Development and characterization of a flux-pumped lumped element Josephson parametric amplifier
Authors: Esposito Martina , Rahamim Joseph , Patterson Andrew , Mergenthaler Matthias , Wills James , Campanaro Giulio , Tsunoda Takahiro , Spring Peter , Sosnina Sophia , Jebari Salha , Ratter Kitty , Tancredi Giovanna , Vlastakis Brian , Leek Peter
Published: January 2019

Josephson parametric amplification is a tool of paramount importance in circuit-QED especially for the quantum-noise-limited single-shot read-out of superconducting qubits. We developed a Josephson parametric amplifier (JPA) based on a lumped-element LC resonator, in which the inductance L is composed by a geometric inductance and an array of 4 superconducting quantum interference devices (SQUIDs). We characterized the main figures of merit of the device, obtaining a −3 dB bandwidth BW = 15 MHz for a gain G = 21 dB and a 1 dB compression point P1dB = −115 dBm. The obtained results are promising for the future use of such JPA as the first stage of amplification for single-shot readout of superconducting qubits.
Thermal-difference states of light: true states of heralded photons
Authors: Horoshko Dmitri , De Bièvre Stephan , Patera Giuseppe , Kolobov Mikhail
Published: January 2019

We introduce a three-parameter family of single-mode optical states whose density operator is a weighted difference of two thermal states, the thermal-difference states. We identify the parameter values for which these states have a negative non-singular P-function, implying they are nonclassical. We show that the states of the “heralded photons” generated via spontaneous parametric downconversion belong to this family, with the three parameters corresponding to the nonlinear gain and the losses in the signal and the idler channels. The thermal-difference states yield new benchmark states for the analysis of nonclassicality and quantum macroscopicity criteria.
Quantum computing thanks to Bianchi groups
Authors: Planat Michel
Published: January 2019

It has been shown that the concept of a magic state (in universal quantum computing: uqc) and that of a minimal informationally complete positive operator valued measure: MIC-POVMs (in quantum measurements) are in good agreement when such a magic state is selected in the set of non-stabilizer eigenstates of permutation gates with the Pauli group acting on it [1]. Further work observed that most found low-dimensional MICs may be built from subgroups of the modular group PS L(2, Z) [2] and that this can be understood from the picture of the trefoil knot and related 3-manifolds [3]. Here one concentrates on Bianchi groups PS L(2, O10) (with O10 the integer ring over the imaginary quadratic field) whose torsion-free subgroups define the appropriate knots and links leading to MICs and the related uqc. One finds a chain of Bianchi congruence n-cusped links playing a significant role [4].
Modelling a timing belt pitch
Authors: Domek Grzegorz , Wilczyński Michał
Published: January 2019

The paper deals with the problem of timing belt pitch significance for the dynamics of a timing belt transmission gear motion. Specific pitches of timing belts have been used for many years. They were previously reserved for belts made of rubber, while another group of pitches was intended for belts made of polyurethane. This division ceased to apply recently, and in addition there are belts with pitches which have not been used before, such as HTD9M or AT15. The paper presents the parameter that makes the pulley diameter and the pitch dependent on the number of teeth involved in meshing (coupling) with a pulley. It is an equivalent of the coverage factor occurring in cylindrical timing gears. Earlier studies on that parameter did not take into account the teeth unevenly spaced over the width of the belt. New pitches of belts may occur in "mass production" applications and they are applied more and more often. Thus it is important to bear in mind the consequences of changing the pitch of the timing belt in transmission gear structures.
Life analysis of the bolted joint
Authors: Sapieta Milan , Sulka Peter
Published: January 2019

The paper deals with the fatigue damage calculation of 2 types of computation model of bolted joints. The study is performed via a numerical analysis with support of finite element method (FEM) software ANSYS. One model was created with a thread on the bolt, another was only bolt with cylindrical surfaces, the second model was greatly simplified. It will be evaluated the fatigue damage for both types of models. Subsequently both types of computational models will be compared in dependence on the accuracy of the results and the speed of the calculation. There are also the theoretical backgrounds for preloaded bolted joint, which was used for calculation of preload load prescribed on body of screws.
Strength reanalysis and influence line equation of rack system drive force
Authors: Blatnický Miroslav , Dižo Ján , Blatnická Mária
Published: January 2019

The paper deals with strength reanalysis of proposed rack system design. At previous analysis it was found out that the structure does not met the safety and reliability conditions due to exceeding allowable stress. After structure modification the next step will be determination of influence line equation for rack system drive force as its effect is time dependent in operation.
Numerical model of solidification process of Fe-C alloy taking into account the phenomenon of shrinkage cavity formation
Authors: Skrzypczak Tomasz , Węgrzyn-Skrzypczak Ewa , Sowa Leszek
Published: January 2019

Mathematical and numerical models of Fe-C alloy solidification process based on the finite element method (FEM) are presented in the paper. The phenomenon of the defect called "shrinkage cavity" is introduced to the model. It is very important aspect of presented work which makes possible the prediction of the location and shape of mentioned defect depending on the geometry of the casting and cooling condition of the process. An original computer program using Visual C++ environment has been written in order to simulate described process. The results of computer calculations of the three-dimensional solidification problem of the casting with riser are presented and discussed in details.
The influence of joining technique on the deformation of laser welded T-joints
Authors: Piekarska Wiesława , Saternus Zbigniew , Sapieta Milan , Kopas Peter
Published: January 2019

T-joints are often used in large-scale welded constructions. The use of a laser beam for welding allows to create joints using various techniques. Used welding method affects the shape and size of heat affected zone, deformation of welded elements and consequently the quality of the joint. This work concerns the numerical modeling of the size of heat affected zone and welding deformations in T-joint obtained with two different welding techniques: single-side fillet T-joint and butt welded T-joint, called I-core welded joint. Numerical simulations are carried out in the commercial Abaqus FEA software, supplemented by an additional numerical subroutines which enabled the analysis of thermomechanical phenomena occurring in welding process. Mathematical model of a moveable welding source and the description of heat source positioning relative to the edges of the connected elements are described in numerical subroutines. The material parameters of austenitic steel are taken into account. The size of deformations of welded joints are determined as well as the influence of two different joininig techniques of T-joint on the amount of generated welding deformations are analyzed and compared.
Design and stress analysis of wheeled compactor construction
Authors: Jakubovičová Lenka , Vaško Milan , Sága Milan , Kopas Peter , Novák Pavol , Handrik Marián
Published: January 2019

The article deals with the design of compactor for a backhoe loader for middle size excavators. Construction of compactor clamp was designed from heavy gauge sheets which will be welded. For expansion of penetrating into thickening soil there were segments designed on drum. From the point of fatigue during comparison of reached maximal tensions and comparison of these values for several loaded alternatives from Wöhler curve was defined static safety factor.
Modeling of acoustic pressure variability at thoroughfare
Authors: Radziszewski Leszek , Kekez Michał , Bąkowski Andrzej , Sapietova Alžbeta
Published: January 2019

The work presents the analysis of variability of acoustic pressure, calculated from values of equivalent sound level, recorded in monitoring station. The models of acoustic pressure variability were built in the form of regression trees and random forest. The analysis of accuracy of obtained models was carried out. These models were subsequently used for reconstruction of equivalent sound level for periods of monitoring station inactivity.
Design of a prototype frame of an electrically driven three-wheel vehicle
Authors: Harušinec Jozef , Suchánek Adnrej , Loulová Mária , Kurčík Pavol
Published: January 2019

The article deals with the design of the frame, which will serve to build a new prototype three-wheel vehicle with ecological drive. The proposed frame will be made of aluminum to reduce the weight of a three-wheel vehicle. The new design will allow for optimal distribution of individual parts of an electric vehicle. The 3D model of the frame is created in the CATIA program. The static load calculation will be realized in the ANSYS program.
Prediction of microstructure composition in steel plate heated using high power Yb:YAG laser radiation
Authors: Kubiak Marcin
Published: January 2019

This work concerns numerical modelling and computer simulations of temperature field and phase transformations during Yb:YAG laser heating of sheets made of S355 steel. The distribution of laser power emitted by Trumpf laser head D70 is used in the analysis. The heat source is modelled on the basis of interpolation algorithms using geostatistical kriging method. Coupled heat transfer and fluid flow in the fusion zone are described respectively by transient heat transfer equation with convective term and Navier-Stokes equation. The kinetics of phase transformations and volumetric fractions of arising phases are obtained on the basis of Johnson-Mehl-Avrami (JMA) and Koistinen-Marburger (KM) models. Continuous Heating Transformation (CHT) diagram is used for heating process and Continuous Cooling Transformation (CCT) diagram is used for heated steel with the decomposition of final volume fractions of phases transformed form austenite dependant on cooling rates.
Comparison of FE analysis and experimentally obtained data for the identification of residual stresses in welded high-strength steel
Authors: Vaško Milan , Baniari Vladislav , Handrik Marián , Vaško Alan , Jakubovičová Lenka , Kopas Peter
Published: January 2019

The main idea of this paper is to compare the results of FE analysis and data obtained by experiment for identification of residual stresses in welded high-strength steels. The DOMEX steels welded by two technologies are compared – steel welded with laser beam and steel welded by electric arc. Residual stresses at the surface and just below the surface were evaluated using X-rays at predefined points. These data were subsequently processed in MATLAB and evaluated. FE analyzes were performed in software SYSWELD and ADINA.
Dynamics of the mobile platform with four wheel drive
Authors: Jaskot Anna , Posiadała Bogdan
Published: January 2019

The dynamics problem of motion of the mobile platform with four wheel drive under the unsteady conditions have been formulated and analysed. The mobile platform prototype have been equipped with four independently driven and steered electric drive units.The theoretical model have been formed for the proposed design concept of the platform. The relations between friction forces in longitudinal and transverse directions in reference to the active forces have been considered. The analysis of the motion parameters for different configurations of the wheel positions has been included. The formulated initial problem has been numerically solved by using the Runge-Kutta method of the fourth order. The sample simulation results for different configurations of the platform elements during its motion have been included and the conclusions have been formulated.