bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Soil and Water Conservation and Governance of Urban Inland Rivers: A Case Study of Nakau River Basin Governance
Authors: Zhang Yiyuan , Li Dong , Sun Yan , Tang Ronghua , Nong Yongxin
Published: February 2020

Taking the Nakau River Basin Governance Project as the research area, the problems existing in the Nakau River Basin, the key and difficult points of water and soil conservation management, and the measures and implementation effects of water and soil conservation in urban rivers are discussed. According to the characteristics of soil and water loss in the inland rivers of the city, an effective prevention and control measure system was proposed, which ultimately effectively prevented human-induced soil and water loss during the construction of the project, protected water and soil resources, guaranteed the safe operation of the main project, and maintained and improved the regional ecology surroundings.
Investigation and Study on Vegetation of Qinghai-Tibet Highway
Authors: Wei Jiang , Qi Wang , Yonti Shan , Jing Yin , Peng Yang
Published: February 2020

Since the dominant species of original vegetation and the distribution pat terns of the bio-diversities are essential to vegetation recovery and restoration along the Qinghai-Tibet Highway. A vegetation survey was conducted on the Lhasa-Tuotuo River section of the Qinghai-Tibet Highway, and 30 sample points were set to analyze the vegetation community along the Highway. Analysis of vegetation Community along Highway. The results show that there are 18 families, 26 genera, and 32 species of plants in the Qinghai-Tibet Highway Corridor. Compared with the world, China, and Tibet, the plant families belong to 3.26% of the total in the world, 5.341% of the total in China and 8.491% of the total in Tibet, but the species only accounted for 0.542% of the total number of Tibetan plant species. The dominant species of flowering ground cover are Astragalus strictus, Potentilla, etc. the species richness reduced closely with the altitude, and more species in southward than in northward. The variation of vegetation community diversity index is not directly related to elevation, but related to microclimate change along the highway.
Research and practice of green highway construction technology system
Authors: Xiong Xiaohua , Zhang Longsheng , Gao Jianping , Wang Dan , Shao Shegang , Liang Tianwen
Published: February 2020

Taking Guangji expressway as an example, this paper focuses on the goal of building “demonstration road of highway construction, demonstration road of green highway and demonstration road of quality engineering” in Jiangxi Province. It mainly describes the construction idea, realization way, characteristics, highlights and practical experience of demonstration project of Guangji green highway construction.
Design of Electromagnetic Wave Resistivity Measurement System for Underground Coal Mine
Authors: Jiguan Zhang
Published: February 2020

In this paper, the measurement system of electromagnetic wave resistivity logging tool for underground coal mine is designed, which is based on DSP and FPGA. The detection of amplitude ratio and phase difference of weak signal is realized, and its performance index meets the design requirements and actual needs.
Analysis on Comprehensive Treatment of VOCs in Key Industries of A City
Authors: Zhuang Zhipeng , Zhou Weijian , Pang Zhihua , Lei Yutao , Liang Wenzhong
Published: February 2020

Vocs have become a weak base for air pollution control compared to particulate matter, sulfur dioxide and nitrogen oxide. Petrochemical, chemical, industrial coating, packaging and printing, oil storage and Marketing Industries (hereinafter referred to as key industries) are China’s key sources of VOCs emissions. In order to win the battle of protecting the blue sky and improve the air quality, it is urgent to strengthen the comprehensive treatment of VOCs in key industries. In order to fully understand the comprehensive treatment and emission control of industrial sources of organic waste gases in the city, an updated survey was conducted on the emission of VOCs from industrial sources in the region, and the results of the survey were analyzed Analysis report on VOCs emission and comprehensive treatment in key industries.
Analysis of Noise Environment and Noise Reduction Measures in Urban 110kV Indoor Substations
Authors: Liu Fengchun , Tu Shan , Yan Hanbing , Chen Xiufang , Guo Liqiang
Published: February 2020

With the rapid development of society and economy, the public awareness of environmental protection has gradually increased, and urban substation noise has become an environmental issue of concern to residents. In order to study the current status of the noise environment of urban substations, to guide the management of substation noise and the construction of transmission and transformation projects, this article selects 50 110kV indoor substations as objects, and measures their boundary noise. By analyzing the characteristics of the noise source of the substation with excessive noise and various noise reduction measures, the noise reduction methods suitable for urban indoor substations are summarized.
Study on the countermeasures of ecological civilization construction in Guangdong-Hong Kong-Macao Greater Bay Area
Authors: Huang Bao-yuan , Hong Bin , Liu Wei-min , Chen Tong-sheng , Zhuang Zhi-peng
Published: February 2020

Guangdong-Hong Kong-Macao Greater Bay Area (GBA) is highly developed, characterized by obvious geographical advantages, excellent natural resources, continuous improvement of environmental quality, and accumulation of scientific and technological innovation elements. It is an important space carrier and hinterland for the construction of " the Belt and Road initiative ". However, the long-term, high-speed, and extensive development model has also caused the Greater Bay Area to carry more debt in the environment and history. Therefore, in order to construct the pattern of ecological civilization construction in GBA, it is urgent to establish and improve the evaluation system and policy system of ecological civilization from the top-level design, and to construct the pattern of high-quality ecological space, green industry and joint defense.
Implementation of Real-Time Monitoring of Working Conditions to Improve the Monitoring Level of VOCs Pollution
Authors: Zhuang Zhipeng , Hong Bing , Liu Weiming , Chen Tongsheng , Huang Baoyuan
Published: February 2020

It is imperative to improve the monitoring level of organic waste gas pollution by carrying out real-time monitoring of working conditions, which is in line with national policy and social development. Due to the complex composition, widespread distribution of pollution sources and unorganized emission, it is difficult to control organic waste gas effectively only by current emission regulation. The government should follow up continuously and in real time the status of environmental protection equipment opened by polluting enterprises when the technical conditions permits. It is realized the real-time data collection, transmission, storage and form various reports to monitor, check and judge the working status. Through the implementation of the real-time monitoring of working conditions, the supervision efficiency is improved, the management means is enriched, and a great deal of manpower and management costs are saved.
Practical calculation of asymmetric short circuit current of DFIG connected to distribution network
Authors: Fu Pengwu , Yang Dongwen , He Zhi , Duan Zhenfeng , Wang Dengmei
Published: February 2020

In view of the existing complex analytic calculations of DFIG short-circuit current are hardly applied in engineering projects, a practical calculation of asymmetric short-circuit current of DFIG is proposed. According to the complex sequence and their Thevenin equivalent model of DFIG network, the composition of each sequence component of DFIG short-circuit current is analysed. Moreover, considering the low-voltage ride through strategy of DFIG, the negative sequence periodic components of short circuit current are well analysed during the crowbar activation and deactivation, and the formula of the negative sequence periodic components of short circuit current are derived. On the basis of positive and negative sequence open circuit voltage, calculating impedance and rotor current, the judgement of crowbar activation is established. The pre-calculated surfaces of negative sequence periodic components of short circuit current are proposed, and the procedure for calculating the asymmetric short-circuit current of DFIG is designed. Finally, the proposed method is verified by simulation.
Analysis and investigation of the third drainage ditch pollution situation in Ningxia based on multivariate statistics
Authors: Tian Linfeng
Published: February 2020

This article takes the third drainage ditch in Ningxia as the research object, and uses the multivariate statistics method to analyze the interrelationship between the four major pollutants at nine regional points in the main pollution ditch section of the third drainage ditch throughout the year from the perspective of time and space, to improve the water environment quality. SPSS (Social Statistics Software Package) is used to analyze chemical oxygen demand, total phosphorus, total nitrogen, ammonia nitrogen, and index of major pollutants of permanganate. The research results show that the main pollutants and the degree of pollution affecting the water quality of the third drainage ditch are: total nitrogen> ammonia nitrogen> total phosphorus> chemical oxygen demand. At the end of San’er, ammonia nitrogen and total nitrogen were the most polluted. At the Dawukou section of San’er, the chemical oxygen demand and total phosphorus were the heaviest.
Analysis on Intensity Matching Coefficient of Power Distribution Circuit Based on System Reliability Theory
Authors: Han Jiceng , Gao Yan , Cai Jianbin , Lin Deyuan , Zhang Hongjie , Li Yangsen
Published: February 2020

The design intensities of four parts, i.e. ground conductor, hardware fittings, pole tower and foundation are greatly different, so it is difficult to evaluate the reliability of the whole power distribution circuit exactly. In this thesis, the intensity distribution functions of ground conductor, hardware fittings, pole tower and foundation have been calculated respectively, and then based on the system reliability theory, the reasonable failure sequence of power distribution circuit conforming to economic optimization principle is recommended. Under the assumed failure sequence, the calculation about intensity matching coefficient at the target confidence level is implemented, and finally, the intensity matching coefficients of ground conductor, hardwire fittings, pole tower and foundation of power distribution circuit are given.
Uncertainty span for relative permeability and capillary pressure by varying wettability and spatial flow directions utilizing pore scale modelling
Authors: Ramstad Thomas , Kristoffersen Anders , Ebeltoft Einar
Published: February 2020

Relative permeability and capillary pressure are key properties within special core analysis and provide crucial information for full field simulation models. These properties are traditionally obtained by multi-phase flow experiments, however pore scale modelling has during the last decade shown to add significant information as well as being less time-consuming to obtain.

Pore scale modelling has been performed by using the lattice-Boltzmann method directly on the digital rock models obtained by high resolution micro-CT images on end-trims available when plugs are prepared for traditional SCAL-experiments. These digital rock models map the pore-structure and are used for direct simulations of two-phase flow to relative permeability curves.

Various types of wettability conditions are introduced by a wettability map that opens for local variations of wettability on the pore space at the pore level. Focus have been to distribute realistic wettabilities representative for the Norwegian Continental Shelf which is experiencing weakly-wetting conditions and no strong preference neither to water nor oil. Spanning a realistic wettability-map and enabling flow in three directions, a large amount of relative permeability curves is obtained. The resulting relative permeabilities hence estimate the uncertainty of the obtained flow properties on a spatial but specific pore structure with varying, but realistic wettabilities.

The obtained relative permeability curves are compared with results obtained by traditional SCAL-analysis on similar core material from the Norwegian Continental Shelf. The results are also compared with the SCAL-model provided for full field simulations for the same field. The results from the pore scale simulations are within the uncertainty span of the SCAL models, mimic the traditional SCAL-experiments and shows that pore scale modelling can provide a time- and cost-effective tool to provide SCAL-models with uncertainties.
High-Resolution Inline Density Measurements: Insight on Multiphase Flow and Transport Phenomena in Porous Media
Authors: Falat Jelayne , Fehr Adam , Telmadarreie Ali , Bryant Steven
Published: February 2020

Understanding fluid flow in porous media is essential with complex and multiphase fluid flow. We demonstrate that high-resolution in-line density measurements are a valuable tool in this regard. An in-line densitometer is used in fluid flow in porous media applications to quantify fluid production and obtain quantitative and qualitative information such as breakthrough times, emulsion/foam generation, and steam condensation.

In order to determine the potential applications for in-line densitometry for fluid flow in porous media, a series of sand pack floods were performed with a densitometer placed at the outlet of a sand pack. All fluids passed through the measurement cell at experiential temperatures and pressures. An algorithm was developed and applied to the density data to provide a quantitative determination of oil and water production. The second series of tests were performed at high temperature and pressure, with a densitometer placed at the inlet and outlet of a sand pack, for steam applications. In both series of experiments, data acquisition was collected at 1 hertz and the analyzed density data was compared to results from the conventional effluent analysis, including Dean-Stark, toluene separations, magnetic susceptibility measurement, and flash calculations where applicable.

The high-resolution monitoring of effluent from a flow experiment through porous media in a system with two phases of known densities enables two-phase production to be accurately quantified in the case of both light and heavy oil. The frequency of measurements results in a high-resolution history of breakthrough times and fluid behavior. In the case of monitoring steam injection processes, reliable laboratory tests show that in-line density measurements enable the determination of steam quality at the inlet and outlet of a sand pack and qualitative determination of steam condensation monitoring

The use of in-line densitometry provides insight on the monitoring of complex fluid flow in porous media, which typical bulk effluent analysis is not able to do. The ability to measure produced fluids at high resolution and extreme temperatures reduces mass balance error associated with the effluent collection and broadens our understanding of complex fluid flow in porous media.
Towards Relative Permeability Measurements in Tight Gas Formations
Authors: Dzhafarov Denis , Nicot Benjamin
Published: February 2020

Relative permeability is a concept used to convey the reduction in flow capability due to the presence of multiple fluids. Relative permeability governs the multiphase flow, therefore it has a significant importance in understanding the reservoir behavior. These parameters are routinely measured on conventional rocks, however their measurement becomes quite challenging for low permeability rocks such as tight gas formations.

This study demonstrates a methodology for relative permeability measurements on tight gas samples. The gas permeability has been measured by the Step Decay method and two different techniques have been used to vary the saturations: steady state flooding and vapor desorption.

Series of steady-state gas/water simultaneous injection have been performed on a tight gas sample. After stabilization at each injection ratio, NMR T2, NMR Saturation profile and low pressure Step Decay gas permeability have been measured. In parallel, progressive desaturation by vapor desorption technique has been performed on twin plugs. After stabilization at each relative humidity level the NMR T2 and Step Decay gas permeability have been measured in order to compare and validate the two approaches.

The techniques were used to gain insight into the tight gas two phase relative permeability of extremely low petrophysical properties (K<100 nD, phi < 5 pu) of tight gas samples of Pyrophyllite outcrop.

The two methods show quite good agreement. Both methods demonstrate significant permeability degradation at water saturation higher than irreducible. NMR T2 measurements for both methods indicates bimodal T2-distributions, and desaturation first occurs on low T2 signal (small pores).

Comparison of humidity drying and steady-state desaturation technique has shown a 12-18 su difference between critical water saturation (Swc) measured in gas/water steady-state injection and irreducible saturation (Swirr) measured by vapor desorption.
Sonneratia alba Extract Protects the Post Larvae of Tiger Shrimp Penaeus monodon against Vibrio harveyi and Saprolegnia sp.
Authors: Saptiani Gina , Asikin Andi Noor , Ardhani Fikri
Published: February 2020

The research aimed to study Sonneratia alba leaves extract to inhibit Vibrio harveyi and Saprolegnia sp., and to evaluate its effectiveness to protect the post larvae of tiger shrimp against the infections. The leaves of S. alba were cleaned, chopped, dried, macerated and extracted in three different solvents namely ethanol 80%, freshwater and saline water. The post larvae 8 then immersed with the extract and infected with Vibrio harveyi and Saprolegnia sp. The clinical signs, pathological anatomy, total vibrio count, prevalence, survival rate, and relative percentage of survival were observed. The results showed that S. alba leaves extract inhibited V. harveyi and Saprolegnia sp. on post larvae of tiger shrimp, improve survival rate and relative percentage survival. The most effective dosage was 1,250 mg/L either for ethanolic, freshwater and saline water solvents.
Effect of Depth on the Growth and Carrageenan Content of Seaweed Kappaphycus alvarezii Cultivated Using Verticulture Method
Authors: Pong-Masak Petrus Rani , Sarira Nelly Hidayanti
Published: February 2020

Seaweed of Kappaphycus alvarezii is generally cultivated by the long line method through the water surface. The verticulture method might be an alternative method by using water column. This research aimed to evaluate the effects of depth on the growth and carrageenan content of K. alvarezii which was cultivated vertically. Cultivation was carried out in the floating raft (10 x 10 m)2 contained of 36 vertical nets. The size of each net was 5 x 2 m2 whereas the depth was 0.2, 1, 2, 3, 4, and 5 m. Seaweed seedlings of 50 g was each tied to the vertical nets; the distance between the knot was 20 cm. The results showed that the depth was significantly different to the daily growth rate of K. alvarezii (p<0.05) but did not affect carrageenan content (p>0.05). Therefore, this method might be applied as an alternative method to optimally increase seaweed production in narrow area without affecting seaweed quality.
Composition and catch rate of folded cube fish pots in the sea of Tuban Regency
Authors: Suhariyanto Adi , Rachman Faizal , Setyobudi Eko , Setiawan Riza Yuliratno , Alfiatunnisa Nahla , Djasmani Supardjo Supardi
Published: February 2020

This study aimed to determine the composition and catch rate of folded cube fish pots in the seawater of the Tuban Regency. The research was conducted in December 2018 located in the Sokorejo, Tuban Regency, using 30 units of folded cube fish pots with a size of 50x50x50 cm2. The cube folded trap installation was done in 10 times of catch trip and installed in the morning. The catches were collected, identified, and measured for their individual length and weight. The crabs were measured for the length and width of their carapace. The catching result of folded cube fish pots was classified into five types which are fish group (48.97%), crabs group (29.59 %), swimmer crabs (7.1%), Land hermit crab (6.12%), and mud snails (8.16%). The result showed that Two-spined Arm Swimming Crab (Charybdis anisodon) was the most dominant type of catch equal to 29.59% of the total catch, while other types of catch that were quite common are Pig Faced Leather Jacket (Paramonacanthus choirocephalus) (9.18%), and Crescent Pearch (Terapon jarbua) (8.16%). The average catch rate for folding cube was 32%/trip with a weighted average catch of 436.58 gr/trip.
Growth pattern and Condition factor of Mangrove Crab (Scylla tranquebarica) in Segara Anakan Cilacap Regency
Authors: Redjeki Sri , Hartati Retno , Endrawati Hadi , Widianingsih Widianingsih , Nuraini Ria Azizah Tri , Riniatsih Ita , Agus Elsa Lusia , Mahendrajaya Robertus Triaji
Published: February 2020

Scylla tranquebarica is a species of mangrove crabs belong to family Portunidae, class Crustacea. The purpose of this research was to study population mangrove crab S. tranquebarica habitat in Segara Anakan Lagoon Cilacap Regency. The mangrove crabs were collected in April 2019 using bubu trap as fishing gear. Sampling was carried out in Klace, Sapuregel and Panikel area. The growth pattern for mangrove crab in the Sapuregel area was allometric negative both for males (b= 2.27) and females (b= 2.28). But for Panikel village area, the growth pattern for males was allometric negative (b = 2.67), while for females it was allometric positive (b = 3.95). In the Panikel area, the average value for the condition factor was 1.456 ± 0.65. Additionally, in the Sapuregel area the average value of Condition factor was 1.004±0.09.
Fin Length and Total Length Relationships of Silky Shark Carcharhinus falciformis Landed at Tanjung Luar Fish Landing Port, West Nusa Tenggara, Indonesia
Authors: Oktaviyani Selvia , Kurniawan Wanwan , Fahmi
Published: February 2020

Shark fins are a very valuable product for international trade. This study aims to obtain the equations describing the relationship between fin length and the total length of silky shark. Using the total length at sexual maturity (Lm), the equation is then used to estimate the fin length associated with this Lm, which can then be included in the recommendation for international shark fin trades. Data collection was carried out from March 2018 to February 2019 at Tanjung Luar Fish Landing Port, West Nusa Tenggara. All data were collected from 2,837 individuals of silky sharks, consisting of 1,416 females and 1,421 males. The total length of silky shark ranges from 61 to 282 cm for females and 18-283 cm for males. The relationships of first dorsal fin length and total length is DFL=2.0151+0.1243 TL (both sexes). Furthermore, the relationships of pectoral fin length and total length were found to be PFL=-8.0098+0.2127 TL (both sexes). The first dorsal fin length and pectoral fin length at the time the silky shark sexually matures were 23 cm and 35 cm, respectively. This fin-total length relationship can be used by the fisheries authority to determine the allowed minimum size of silky shark fins for export.
Composition and catch rate of fishing pot as eco-friendly fishing gear at the estuary of Bogowonto River in Kulon Progo Regency
Authors: Rachman Faizal , Arrosyid Zaid H. , Syahrifudin Saiful N.
Published: February 2020

The estuary of Bogowonto river in Kulon Progo Regency was habited by various species such as fish, shells, crabs, and snails. This research aimed to know the composition and catch rate of the fishing pot using various kinds of fodder. The method used in this research was catch identification and assessment of type, length and weight of the catch, and also the fishing pot’s effectiveness as eco-friendly fishing gear. Data analysis was conducted by measuring fish length, catch composition, and catch rate of the fishing pot. The result showed the catch composition consisted of 8 types of species which are mangrove crab (5%), freshwater crab (0.81%), pufferfish (3.38%), orange-spotted grouper fish (0.14%), green tiger prawn (0.14%), giant tiger prawn (0.41%), banana prawn (0.14%) and freshwater snail (90%). The pot with fresh fish fodder had the highest number of catch (66.08%) compare to salted fish (23.51%) and roasted coconut (10.41%) fodder. The highest catch rate of fishing pot was observed on fresh fish fodder (35.42 g/fishing pot) compare to salted fish fodder (11.19 g/fishing pot) and roasted coconut fodder (4.61 g/fishing pot). Based on the result, fresh fish is considered a more effective fodder compared to salted fish and roasted coconut.
Technical and Economic Aspects to Increase the Income of Seaweed Farmers in Milangodaa Village, Popayato Timur Subdistrict, Gorontalo
Authors: Jayanti Anes Dwi , Suadi  , Habibie Sitty Ainsyah , Ariasari Ana
Published: February 2020

Milangodaa Village, Popayato Timur Subdistrict is one of the important seaweed cultivation locations in the Gorontalo province. But in recent years there has been a decline in both the productivity and quality of seaweed produced from this region. This research was conducted to determine the factors that caused a decrease in productivity and strategies to increase the productivity and income of seaweed farmers in the area. This research was conducted with a triangulation method that combines area of study, interviews, and using secondary data. Factors that make a decrease in productivity are diseases, scarcity of seed availability, the fell of seaweed price, and the decreased trust among farmers to the role of institutions and groups in tackling problems. The farmers’ income can be increased by applying the harvest strategy, applying the technical approach such as increasing the area of cultivation, improving the distribution system of seeds and crops, and improving facilities and infrastructure such as anchoring ports and boat capacity. The economical approach consisted of financial sheet assistance, increase the bond among farmers through engaging community and institution as well as agreement on the management of input supply, access and marketing, and distributing the output.
Enhancing Millennial Awareness Towards Marine Litter Through Environmental Education
Authors: Kusumawati Ika , Setyowati Mita , Dharma Syakti Agung , Fahrudin Achmad
Published: February 2020

One of the influencing factors is the community behavior which reflected public practices in littering. Children are social capital for the community and the essential agents of social change. However, they have issues in recognizing the foundation and the explanation of the environmental problem. The research objectives; to examine millennial perception towards marine litter and the influence of environmental education towards youth perceptions in West Aceh. This study employed a survey approach by distributing questionnaires to 150 respondents from several senior high schools. The data is collected by a questionnaire survey (self-administrative or face-to-face) from January 2019 to June 2019. The researcher distributed questionnaires to students to assess the level of awareness of marine litter. The questionnaire was distributed in two sessions, namely: the first session was before environmental education is given to students; the second session was distributed when students completed environmental education It was found that respondents show low awareness of marine litter according to statistical data but the marine litter short workshop significantly has a positive impact. It concludes that increasing youth awareness through education can be an opening step in combating marine litter to then integrate with approaches to achieve a clean sea.
The Utilization of Gracilaria verrucosa as Fish Processing Wastewater Biofilter
Authors: Sari Dhia Rahma , Adharini Ratih Ida
Published: February 2020

Wastewater from the smoked-fish processing industry has been known to cause water pollution in Pengadulan Estuary, Jepara. This research aimed to assess the ability of Gracilaria verrucosa as biofilter for fish processing wastewater and investigate its growth rate. This study was conducted at the Center for Brackish Water Aquaculture (BBPBAP) Jepara from January to April 2019. This study used three different G. verucosa biomass in 60 L aquarium: 150 gram (A); 200 gram (B); and 250 gram (C) and control. The parameters observed in the study were seaweed biomass, nutrient uptake by seaweed, and water quality parameters: salinity, water temperature, pH, dissolved oxygen, TSS, BOD5, ammonia (NH3), nitrate (NO3), and phosphate (PO4). The results showed that G. verrucosa decreased ammonia, phosphate, and nitrate by 67.6%, 96%, and 37.1%, respectively. The result of RGR value has increased on the 10th and 30th day whereas on the 20th day were declined. The highest RGR value obtained on the 10th day on Treatment 1, which is 2.1% per day. It can be inferred that G. verrucosa is capable of increasing the water quality and the nutrient uptake in fish processing wastewater. Therefore, G. verrucosa held potential as both ecologically and economically sustainable biofilter.
Meteorological data analysis capabilities in the “VEGA constellation” information systems family
Authors: Uvarov Ivan , Marchenkov Viktor , Tolpin Vladimir
Published: February 2020

Satellite monitoring information systems require joint analysis of heterogeneous data, including meteorological data. To solve these problems, IKI RAS developed a technology for automatic acquisition, storage, presentation and analysis of meteorological data. The archive of meteorological data in IKI RAS is maintained within the Center for Collective Use “IKI-Monitoring“. The data is being continuously updated from a number of sources, primarily with the data obtained by the NCEP model. The data is available for visualization on the map in various ways. Plotting provides time series analysis in comparison to other variables such as vegetation indices. The developed technologies have been applied in development of a number of specialized information systems of satellite monitoring of natural and anthropogenic objects.
Application of remote methods for landscape taxation of forest-park forests
Authors: Artemjev Oleg , Baykalova Larisa
Published: February 2020

Here provided are developed methodologies of landscape taxation of forest–park forests, based on the use of remote sensing methods. The methods of decoding by aerospace photographs of a walking road–path network and recreational forest digression are described. Methods, which are using terrestrial images, will improve the accuracy of assessment of landscape and architectural indicators: the closure of the canopy of the tree stand, the assessment of the aesthetics of the site, the passability of the terrain of the site, sanitary and hygienic assessment.
Improvement of methods of soil survey of territories using remote sensing and 3d-modeling
Authors: Dobrotvorskaya Nadezhda , Chernov Alexandr
Published: February 2020

The effective planning and use of land resources depends to a large extent on the completeness and relevance of the digital data on the territory concerned. A modern solution for obtaining such data is the use of unmanned aircraft systems, with the presentation of the results in the form of digital elevation models and 3D-models. The article presents the practical results of the use of this technique on the example of a part of the territory with heterogeneous relief, shows its advantages with respect to the use of traditional analog data, the main directions and prospects of use for the rational use of land in land management and design of soil and environmental systems of agriculture.
Crown’s anisotropy of a tree and scattering the signals of navigation satellites frequency band L1
Authors: Podoprigora Vladimir , Sorokin Anotoly , Makarov Daniil , Kharlamov Dmitry
Published: February 2020

The model of interaction of signals from navigation satellites with the tree crown is considered. The contribution of the anisotropy of the dielectric constant to the cross section of radio wave scattering due to the orientational ordering of the branches is shown. The calculation of the scattering cross sections for small and large elements is presented. The tensor of orientational ordering of tree branches with division into tiers differing in the size and orientation of elements is introduced. Test measurements of navigation satellite signals passed through the crowns of spruce trees were carried out.
Geoecological assessment of the state of postagrogenic lands of the Moscow village soviet council of the Republic of Khakassia on the basis of remote sensing data
Authors: Pavlova Ekaterina V. , Volkova Anastasiia I. , Demina Ekaterina A.
Published: February 2020

Currently, the consequences which take place in Khakassia expansion of tree-shrub vegetation on fallow lands have not been properly assessed neither from an ecological nor economic point of view. Based on the analysis of the agricultural map scale 1: 100 000 decoding images Landsat 4–5, 7, 8 and Sentinel 1, and 2, as well as subsatellite ground researches were carried out the identification, the description and assessment of the qualitative state of postagrogenic lands of Khakassia exposed to the processes of overgrowth of tree-shrub vegetation. As an example, this article analyzes the processes of overgrowth of agricultural land on the example of the territory of the Moscow village council of Ust-Abakan district. A geoinformation project of spatial distribution of postagrogenic lands within the Moscow village council of Ust-Abakan district of Khakassia was developed. The results of the research showed that in the studied area in the structure of agricultural land 67204 hectares of land belongs to the fallows located at different stages of recovery of which 77 % exposed to overgrowth processes. The obtained data indicate the need for the formation of management decisions in the field of land use.
Fatigue life estimation of components with use a non-linear energy model coupled a finite element method
Authors: AID Abdelkrim , ABDERRAHMANE Aissa , BENDOUBA Mostefa , DJEBLI Abdelkader , El Ganaoui Mohammed
Published: February 2020

The work presents a non-linear fatigue computation method together with finite element method, in which energy parameter has been used. The Proposed model has been used for simulation computations, based on experimental testing of Al-2024 aluminum alloy specimens subjected to two types of loads, i.e. variable blocs loading and random loading. Computations of energy parameter value have been donebased on the results of FEM elastic–plastic analysis of cyclic properties of a material.

A computing Matlab-based algorithm of the fatigue life prediction methodology was developed. The proposed damage indicator is connected cycle by cycle to the Wöhler curve. Cycles were counted with the rain-flow algorithm, and damage was accumulated with this model and with the Palmgren–Miner rule. On the grounds of which fatigue life has been read off from only characteristics of specimens. An experimental verification shows a satisfactory agreement between the fatigue life calculation results by the proposed methodology and test results. Estimated and experimental lives are found to exhibit good agreement.
Entropy generation due to the mixed convection flow of MWCNT−MgO/water hybrid nanofluid in a vented complex shape cavity
Authors: Benzema Mahdi , Benkahla Youb Khaled , Boudiaf Ahlem , Ouyahia Seif-Eddine , El Ganaoui Mohammed
Published: February 2020

This paper reports a numerical study of mixed convection heat transfer with entropy generation in a vented complex shape cavity filled with MWCNT−MgO (15:85 vol %) /water hybrid nanofluid. A hot source is placed at the mid potion of the inclined plate of the enclosure, while the rest of the rigid walls are adiabatic. A thermo-dependent correlations proposed by [12] for the dynamic viscosity and the thermal conductivity, especially developed for the considered fluid, are used. After validation of the model, the analysis has been done for a Reynolds numbers ranging from 10 to 600 and total nanoparticles volume fraction ranging from 0.0 to 0.02 using the finite volume method. The predicted results of streamlines, isotherms, isentropic lines, average Nusselt number, average entropy generation and average Bejan number are the main focus of interest in the present paper.
Simulation and comparison of combined ejector-absorption and single effect absorption refrigeration systems
Authors: Ben Zid Nihel , El Ganaoui Mohammed. , Hajji Nejib
Published: February 2020

Refrigeration by absorption is gaining more and more importance nowadays especially in applications where the source of energy used in the generator is renewable. However the major problem of this type of refrigeration lies in the COP, which seems to be weaker than compression machines. The use of an ejector is one of the means that can help overcome this problem. In this work, we are interested in the ammonia-water absorption cycle comprising a gas-gas ejector interposed between the generator and the condenser. We suppose that adding a flash tank between the condenser and the evaporator could help improve the entrainment ratio of the ejector. Simulations using the Hysys software are performed in order to look for the optimal conditions for the work of this machine and to make a comparison in terms of performance with single effect cycles. Results showed a significant improvement in the COP and proved therefore that it has better performance than single effect cycles.
Progress on numerical simulation of nanofluids: impact of an isothermal spherical partition on the mixed convection of nanofluids within cubic enclosures
Authors: BOUTRA A. , RAGUI K. , LABSI N. , BENKAHLA Y.K. , BENNACER R
Published: February 2020

The main objective of our work is to light out the three-dimensional flow of an Ag-water nanofluid within a lid-driven cubical space which equipped with a spherical heater into its center. Due to its crucial role in the characterization of the main transfer within such configurations, impact of some parameters is widely inspected. It consists the Richardson value (0,05 to 50), the solid volume fraction (0% to 10%), as well as the heater geometry (10% ≤ d ≤ 25%). To do so, a numerical code based on the Lattice-Boltzmann method, coupled with a finite difference one, is used. The latter has been validated after comparison between the present results and those of the literature. It is to note that the three dimensions D3Q19 model is adopted based on a cubic Lattice, where each pattern of the latter is characterized by nineteen discrete speeds.
Energy efficient building envelope using waste PET in concrete
Authors: Thakur Gitanjali , Asalam Mohamad , El Ganaoui Mohammed
Published: February 2020

One of the major environmental threat in the world today is the increased production of plastic and its usage. The inept plastic waste management system with regard to its recycling and energy recovery in the developing countries creates a global threat as a major land and water body pollutant. However, its durability, thermal properties, and chemical resistance make plastics an alternate choice as a building material. This study investigates the use of plastic in concrete mixture with an objective to improve the thermal performance of the building. The shredded plastic fibers from plastic bottles (polyethylene terephthalate, PET) were used as a partial weight replacement (2.5%, 5%, and 7.5%) of coarse aggregate in concrete blocks. The cubes were cast using the Indian standards (IS 456) and the essential tests were performed. Additionally, experiments were designed to investigate the change in the thermal conductivity of the concrete block due to the varying amount of plastic. It was found that the use of PETs affected the compressive strength and also decreased the thermal conductivity of the concrete blocks. The experimental results suggest that PETs can be used in the construction of energy-efficient building to handle the environmental concerns because of its abundance.
About the Oscillatory Flow Phenomenon within 3D Cylindrical Annulus: Critical Buoyancy and Annulus’ Aspect Ratio for Oscillation Stability
Authors: Ragui Karim , Bennacer Rachid , Boutra Abdelkader
Published: February 2020

The main purpose of our investigation is to providethe impact of some pertinent parameters,asthe thermal buoyancy and the geometryratio,on the oscillatory flow’stability of a Newtonian fluid which occurs within an annulus, found between a cold outer circular cylinder and a hot inner one, to come out at the end with critical conditions that couldpredict this phenomenon intosuch an industrial geometry. To do so, aphysical model is developed using the Lattice-Boltzmann approachside by side with the finite difference one. The validity of the latter is ascertained after comparison between our primary predictionsand various experimental & theoretical ones. By usinganunsteady-state regime, both Isotherms and velocity profiles of ourconvective fluidare widely inspected. Going far with its value, the use of a critical aspect ratio could die-out the impact of any investigated parameter on the oscillatoryflow. Then, only a conductive regime will take control intothe annulus. It is tonote that athree dimensions D3Q19model was adopted based on a cubical Lattice.
Fractal dimension of concrete mix gradation: a quantitative parameter for some concrete properties
Authors: Sebsadji Soumia Kheira , Chouicha Kaddour
Published: February 2020

This study is based upon the fractal feature of ideal Particle Size Distributions (PSD) suggested by numerous concrete mix designs, i.e. ideal PSD can be shown to be equivalent to a power law distributions EC(ϕi) ∝ ϕi− DF, EC(ϕi) is the number of grains of size greater than ϕi, and DF is a nonwhole number called fractal dimension. This fact allows us to analyze the solid skeleton of a concrete mix (all solid components of the mixture) as a fractal structure, thus to determine some of physical properties of the concrete mixture. For DF ranging from 2.5 to 3, and based upon many parameters of the concrete mix (as the granular range, the volumetric fraction of solids in the concrete mixture…), analytical formulas have been proposed relating DF and some properties of the concrete in the solid state. The required properties are the coarse-to-fine aggregate ratio, the fineness modulus of the sand fraction, the average grain size and volume of the fine fraction in the concrete mix. The focus of this research is to develop formulas by which concrete properties can be predicted knowing the concrete mix gradation, i.e. the mix design method used.
Der schwierige Atemweg auf der Intensivstation
Authors: Kandaouroff Timm , Bone Hans-Georg
Published: February 2020

Etwa 20% aller Atemwegssicherungen auf der Intensivstation werden als schwierig beschrieben. Die eingeschränkte physiologische Reserve des Intensivpatienten in der oft dringlichen Situation, die räumliche Enge und die Inhomogenität der ärztlichen Besetzung stellen wesentliche Unterschiede gegenüber der Atemwegssicherung im OP dar. Dieser Beitrag gibt einen Überblick über diese Besonderheiten und skizziert eine mögliche Herangehensweise.
Sequentielle Immuncheckpoint-Inhibition beim Merkelzellkarzinom
Authors: Mohr A. , Langan E. A. , Terheyden P.
Published: February 2020

Das Merkelzellkarzinom (MCC) ist der Hauttumor mit der höchsten Mortalität. Auf eine Therapie mit Immuncheckpoint-Inhibitoren spricht zwar mehr als die Hälfte der metastasierten Patienten an, es ist aber nicht bekannt, wie bei Patienten, die nur unzureichend oder nicht mehr von einer PD-1- oder PD-L1-Blockade profitieren, vorzugehen ist.

Wir stellen einen 67-jährigen Patienten mit multiplen Lebermetastasen eines MCC vor. Die Erstdiagnose wurde 5 Jahre vor Auftreten der Fernmetastasierung gestellt. Nachdem es unter einer Chemotherapie mit Paclitaxel und Carboplatin als Erstlinientherapie zu einem Progress der Lebermetastasen gekommen war, wurde eine Therapie mit dem Immuncheckpoint-Inhibitor Avelumab (anti-PD-L1-Antikörper) eingeleitet. Unter dieser Therapie zeigte sich trotz initialen guten Ansprechens im 1. Staging nach 6 Gaben ein Progress einer Lebermetastase bei stabilem Befund weiterer Lebermetastasen. Der Patient wurde wegen der progredienten Lebermetastase hemihepatektomiert. In der Folge bildeten sich weitere Lebermetastasen, sodass eine Therapie mit dem PD-1-Inhibitor Pembrolizumab eingeleitet wurde. Unter dieser Therapie zeigte sich nun eine über mehr als 2 Jahre anhaltende und fortbestehende komplette Remission.

Dieser Fall könnte darauf hinweisen, dass beide Moleküle unterschiedliche Wirkmechanismen haben und ein sequentielles Vorgehen eine sinnvolle Strategie sein kann. Wir empfehlen, zu dieser Frage eine gezielte klinische Studie durchzuführen.
Initial amyopathische Dermatomyositis mit Lungenbeteiligung und Anti-MDA5-Antikörpern
Authors: Schumacher N. , Rudolphi P. , Zillikens D.
Published: February 2020

Die Dermatomyositis ist eine chronisch-inflammatorische Erkrankung mit charakteristischen Hautveränderungen und unterschiedlich stark ausgeprägter Myopathie. Einige Patienten zeigen zwar typische Hauteffloreszenzen, präsentieren sich jedoch zunächst ohne erkennbare (amyopathisch) oder mit geringer (hypomyopathisch) klinischer und laborchemischer Muskelbeteiligung. In diesen Fällen kann die fehlende Muskelbeteiligung zu einer verzögerten Diagnosestellung und daraus resultierender Verschlechterung der Prognose führen. Myositis-spezifische Autoantikörper können in dieser Situation bei der diagnostischen und prognostischen Einordnung helfen. Hierzu zählen unter anderem Antikörper gegen das melanoma differentiation antigen 5 (Anti-MDA5), die mit hoher Spezifität bei der amyopathischen Dermatomyositis, assoziiert mit interstitieller Lungenerkrankung, nachweisbar sind. Wir präsentieren den Fall einer 56-jährigen Patientin mit unspezifischer klinischer und laborchemischer Symptomatik, bei der erst die Korrelation aus Klinik, Histopathologie und Nachweis von Anti-MDA5-Antikörpern zur Diagnosesicherung einer initial amyopathischen Dermatomyositis mit Lungenbeteiligung führte.
Das Spinnhaus an der Spree
Authors: Hardinghaus Christian
Published: February 2020

Ein Magazin wie der klinikarzt verdient eine Kolumne zur Klinikgeschichte. Damit gemeint ist nicht die Geschichte allgemeiner Krankenhausentwicklung, sondern es soll in jeder Folge die Historie einer bedeutenden Klinik vorgestellt werden. Sie alle kennen diese Krankenhäuser. Einige von Ihnen arbeiten in dem ein oder anderen. Doch kennen Sie neben berühmten Ärzten, die Ihre Institution hervorgebracht hat, auch die Umstände ihrer Entstehung, die kleinen Rätsel der Vergangenheit, die Leichen im Keller, die prominentesten Patienten oder spektakulärsten Bauten?

Beginnen wir mit dem ältesten Krankenhaus unserer Hauptstadt: Die Berliner Charité, die heute mit über 3000 Betten und fast 15 000 Beschäftigten zu den größten und bedeutendsten Krankenhäusern Europas zählt.
Swinging-Flashlight-Test – Schritt für Schritt
Authors: Demberg Lilian , Ehrt Oliver
Published: February 2020

Die Abklärung unklarer Sehstörungen ist ein schwieriger Prozess. Dem Swinging-Flashlight-Test kommt aufgrund fehlender Invasivität, schneller Durchführbarkeit und seinem großen differenzialdiagnostischen Wert eine Schlüsselrolle bei der Abklärung unklarer Sehstörungen zu – vorausgesetzt er wird korrekt durchgeführt.