bluuebunny/crossref_metadata_2025 huggingface dataset:
Aulacaspis tubercularis
. [Distribution map].
Authors: CABI  , EPPO
Published: August 2021

A new distribution map is provided for
Aulacaspis tubercularis
Newstead. Hemiptera: Diaspididae. Hosts: mango (
Mangifera indica
). Information is given on the geographical distribution in Africa (Benin, Egypt, Ethiopia, Gambia, Ghana, Cote d'Ivore, Kenya, Liberia, Madagascar, Malawi, Mauritius, Mozambique, Reunion, Seychelles, Sierra Leone, South Africa, Tanzania, Zanzibar, Togo, Uganda, Zambia, Zimbabwe), Asia (China, Guangdong, Hainan, Sichuan, Hong Kong, India, Andaman and Nicobar Islands, Andhra Pradesh, Bihar, Gujarat, Haryana, Himachal Pradesh, Karnataka, Kerala, Sikkim, Tamil Nadu, Uttar Pradesh, West Bengal, Indonesia, Borneo, Java, Iraq, Israel, Japan, Laos, Malaysia, Peninsular Malaysia, Sabah, Sarawak, Myanmar, Nepal, Pakistan, Philippines, Sri Lanka, Taiwan, Thailand, Vietnam), Europe (Italy, Sicily, Portugal, Madeira, Spain, Canary Islands), North America (Antigua and Barbuda, Aruba, Bahamas, Barbados, Bermuda, British Virgin Islands, Dominican Republic, El Salvador, Grenada, Guadeloupe, Haiti, Jamaica, Martinique, Mexico, Puerto Rico, Saint Lucia, Trinidad and Tobago, United States Virgin Islands, USA, Florida), Oceania (Australia, Queensland, New Caledonia, Papua New Guinea, Vanuatu), South America (Argentina, Brazil, Espirito Santo, Goiás, Maranhão, Minas Gerais, Rio de Janeiro, Rio Grande do Sul, São Paulo, Chile, Colombia, Guyana, Suriname, Venezuela).
Aulacaspis yasumatsui
. [Distribution map].
Authors: CABI  , EPPO
Published: August 2021

A new distribution map is provided for
Aulacaspis yasumatsui
Takagi. Hemiptera: Diaspididae. Hosts: cycads (Cycadales). Information is given on the geographical distribution in Africa (South Africa), Asia (China, Yunnan, Hong Kong, Indonesia, Java, Sulawesi, Malaysia, Peninsular Malaysia, Philippines, Singapore, Taiwan, Thailand, Turkey, Vietnam), Europe (Bulgaria, Croatia, Cyprus, Hungary, Poland, Slovenia, United Kingdom, England), North America (Bahamas, Barbados, Bermuda, Cayman Islands, Costa Rica, Dominican Republic, Guadeloupe, Guatemala, Martinique, Mexico, Puerto Rico, Saint Kitts and Nevis, Saint Vincent and the Grenadines, U.S. Virgin Islands, United States, Alabama, Florida, Georgia, Hawaii, Louisiana, South Carolina, Texas), Oceania (Fiji, Guam, Northern Mariana Islands, Palau), South America (French Guiana).
Manipulation of precession modes in all-permalloy nanostripe-nanopillar structured spin torque nano-oscillator driven by direct current
Authors: Feng Jindi , Li Kunpeng , Zheng Mingkun , Yuan Xiaojuan , Liu Yong , Lu Zhihong , Xiong Rui
Published: August 2021

We investigated the dynamical behaviors of an all-permalloy structured spin–torque nano-oscillator (STNO) composed of a nanostripe with in-plane magneto-anisotropy and a free magnetized nanopillar in the absence of a non-magnetic spacer via a micro-magnetic simulation. It is found the newly-devised STNO exhibits two stable precession modes of magnetization in the nanopillar: out-of-plane precession mode and in-plane precession mode under varying applied DC current densities. The switching between the two modes is generated in a certain current density, depending on geometries of the nanopillar as well as the nanostripe. Given a special nanopillar geometry, both modes demonstrate stable oscillation properties in a certain range of current densities. Pulsed magnetic field can effectively realize transformation of the two modes under application of a proper current density. The realization of synchronous oscillations to significantly enhance the output power is verified in this new type of STNO by etching plenty of nanopillars on the nanostripe to build STNOs array.
Research on Cascade Utilization and Reconfiguration of Decommissioned Power Batteries based on Flexible Control Technology
Authors: Zheng Yongqiang , Xue Hejie , Wang Fengjuan , Chang Dingyuan
Published: August 2021

With the development and popularization of electric vehicles, the number of decommissioned power batteries increases progressively year after year, urgently requiring the cascade utilization and resource regeneration. In view of the difficulties in assembling decommissioned power batteries, the inflexible system access, and the difficulty in improving the availability of decommissioned batteries, based on the flexible control technology, this paper proposes the architecture of common DC bus for multiple bidirectional DC/DC converters and its energy control technology. Through the supporting source of the DC bus voltage, the coordinated control of the common DC bus architecture is realized. According to the proportion of the capacity of each battery pack, the output depth of each is balanced to realize the energy control between the multiple bidirectional DC/DC converters. In this paper, the multi-port flexible access devices based on flexible control technology is summarized as the research object, the reconfiguration and control strategy of multi-type and multi-cascade decommissioned power batteries are studied, and the prospect of the cascade utilization of decommissioned power batteries is forecasted.
Remote Real Time Monitoring System of Slope and Its Application in Sustainable Mining of Open Pit Coal Mine
Authors: Hou Dinggui , Song Xinyue , Li Sifan , Lu Chenmei , Ma Kelin , Li Jianing
Published: August 2021

The mining of open-pit coal resources will form a large number of mine slopes and the geological hazard of slope landslide restricts the sustainable production of open-pit coal mine, monitoring and early warning of landslide disasters can reduce the losses caused by landslide disasters but now the most widely used displacement monitoring technology can not achieve the function. Based on the mechanism of landslide mechanics, the new remote real time monitoring method is proposed and its equipment system is developed, the remote real-time monitoring and early warning work of Antaibao open-pit coal mine slope is carried out. The monitoring locations are determined by finite difference numerical simulation method, through the remote monitoring results and slope stability analysis indicate that the slope is at a stable state. It has been proved by engineering practice that the monitoring of slope mechanics can ensure security of the continuous mining of the mine.
Research on the Collaborative Clearing Model of Ancillary Service and Electric Energy Market
Authors: Zhang Fan , Ma Gaoquan , Yang Zheling , Xie Mengfei , Liu Yunren , Su Yaojia , Zhang Qian
Published: August 2021

There is a coupling relationship between the ancillary service market and the electric energy market. The joint clearing mechanism between the ancillary service market and the electric energy market is one of the urgent problems in the electric power development and electric power market construction. This paper studies the collaborative clearing mechanism of the frequency modulation market and reserve and electric energy market. Firstly, the separation sequence method and collaborative optimization method in CAISO power market are introduced, and the advantages and disadvantages of these two ancillary service clearing methods are compared and analyzed. Finally, the rationality and effectiveness of the above analysis are verified by an example, and the corresponding suggestions on the way of clearing should be adopted in the construction of power market are put forward.
A review on heavy metal contamination at mining sites and remedial techniques
Authors: Karn Rama , Ojha Nishita , Abbas Sadiqa , Bhugra Sonal
Published: August 2021

Urbanization is taking place at a rapid pace resulting in an increased amount of pollution. Eventually, the extraction of precious metals and minerals releases hazardous metallic substances into the atmosphere increasing their existing quantity. Many health problems and illnesses in humans are associated with heavy metal toxicity. Plants, microorganisms and aquatic organisms are also affected. Toxic heavy metals include arsenic, zinc, etc. Physical and chemical methods of remediation have many drawbacks. Whereas the biological approach is a clean, inexpensive method, and a promising emerging field. This review article briefly summarizes the heavy metal impacts and their removal techniques.
Determination of PCU values for mixed traffic conditions along the hilly road of East Sikkim
Authors: Bomzon Upama , Sherpa Uden K , Sarkar Sajal , Chettri Sunil , Jyoti Das Dibya , Sushib Rishu
Published: August 2021

The road space in India is shared by different travel modes with different physical dimensions. On top of this, lane disciple is also not followed in India. All these factors influence the evaluation of traffic characteristics, roadway capacity, defining model for traffic flow and other transportation design factors. Passenger car unit (PCU) is a frequently used unit for calculating and expression of heterogeneous traffic volume to a simpler equivalent traffic unit where a passenger car is taken as a standard vehicle and all other classes of vehicle are expressed in terms of the standard car. For the present study, 11 km stretch of NH-10 in East Sikkim was taken into consideration. Data collection was done by video graphic survey. PCUs of different classes of vehicle are estimated using the speed area method by using traffic volume data. The PCU is calculated by multiplying the speed and area ratios of standard cars by the PCU of the subject vehicle type. The methodology adopted in this study is very much suitable for making proper PCU model under different conditions of heterogeneous traffic and road conditions of the study area..
RETRACTED: Design of Base Isolation System for a Six Storey Reinforced Concrete Building
Authors: Chinchole Akshay , Singh Tumrate Charanjeet , Mishra Dhaneshwar
Published: August 2021

The aim of the seismic design is to protect the important building such as museums, hospitals, official buildings etc.., and reduce the damages after a seismic event. Many researchers have done a lot of research to get the best solutions to resist earthquakes and protect survival. One of those solutions is base isolation, the main goal of seismic isolation is to shift the fundamental frequency of a structure away from the dominant frequencies of earthquake ground motion and the fundamental frequency of the fixed base-superstructure, the other purpose of an isolation system is to provide an additional means of energy dissipation, thereby reducing the transmitted acceleration into the superstructure. In the present study, a six-story RCC building has been designed and analyzed according to IS Code for seismic analysis by (STAAD PRO V8i) software using response spectrum analysis, the study considered two models one of the models represents conventional building and the second model represents base isolation (BI) building. The results obtained shows the reduction in base shear and storey drift in both direction and increase in the displacement and the time period for the base isolated structure. Finally, parameters such as storey displacement, storey drift, mode and base shear are compared and obtained result where presented by both graphically and in tabular format.
Properties of concrete containing industrial waste as a fine aggregate: A review
Authors: Kumar Sharma Prateek , Tripathi Bhavna
Published: August 2021

This paper presents a discussion of work reported on properties of concrete prepared using industrial wastes as partial replacement of fine aggregate. Industrial wastes such as waste generated during mining and dressing of marble and granite; refining of zinc and lead waste i.e. jarosite, WFS (Waste Foundry Sand), broken glass waste, ISF (Imperial Smelting Furnace) slag, and Waelz slag as fine aggregate have been studied. The effect of these materials on compressive strength, flexural strength, water absorption, carbonation, sulphate resistance, chloride resistance and freeze thaw resistance were studied. The review of reported results indicated that the particle size distribution of industrial waste significantly influences the properties of fresh and hardened concrete. It was observed that replacement of natural fine aggregate with an industrial waste possessing particle size proximal to that of natural sand does not significantly alter the properties of concrete. Moreover, it was observed that waste materials that are finer than natural sand may have a negative effect on the properties of concrete. Majority of the waste materials indicated comparable to control compressive/flexural strength, resistance to water absorption, carbonation, sulphate attack, chloride ion permeability, and freeze-thaw properties of concrete containing waste materials as replacement of fine aggregate.
Seismic Behaviour of Double Arched Tunnel: A Review
Authors: Khan Md Shahab , Abedin Khan Zainul , Sadique M. R. , Masroor Alam Mohd.
Published: August 2021

Major earthquakes will cause multi-hazard issues for tunnels. Yet, advantages associated with it in terms of sustainability, time, land and fuel saving have made tunnels a vital option in modern cities. Double-arch tunnels are generally accepted for their effective and economical solutions as they have significant advantages in adjusting to the characteristics of the region and environmental safety. Experimental, numerical and analytical studies had been conducted by the researchers to understand its static and dynamic behavior. In the present study, authors have categorized and critically summarized the researches on double arch tunnel. It is essential for platform of higher research and development in this field.
Response of Twin Transportation Tunnel in Earthquake Loading: A Review
Authors: Abedin Khan Zainul , Khan Md Shahab , Sadique M. R. , Samanta Manojit , Masroor Alam Mohd.
Published: August 2021

Tunnels are a major underground structure used for transporting passengers, water, wastewater, etc. Design of a tunnel/twin tunnel requires fixing the spacing between tunnels, assessment of hazards to surface structure due to tunnelling and protection measures, etc. Experimental, numerical, analytical methods or a combination of the above techniques are used to design and investigate the stability under static and dynamic conditions. Ground settlement due to tunnel construction, the spacing between the tunnels, the tunnel response during earthquake loading, influence of alignment, etc., have been reviewed and summarized from the past published literature. A summary of the different design criteria for twin tunnels is reviewed and presented here. The present paper will be helpful for engineers and researchers working in this area.
A Study on Effect of Shear Wall in Seismic Analysis of Building
Authors: Anya Boria , Ghosh Tamal
Published: August 2021

With the proliferation of population and increasing demands for the space in urban areas, the need for tall structures has been grown up significantly. Tall structures are susceptible under dynamic loading which mainly threatens in form of time dependent lateral loading caused from mainly earthquake and wind. Response spectrum analysis is widely used in such cases to evaluate the seismic capacity of a structure. The present literature focuses on two different models with and without using shear walls at different positions. The article showcases the parametric study in terms of storey drift, displacement and base shear comparison for different location of shear wall in the building. The results are unique and fruitful for future attention.
Artificial neural network techniques for evaluation of pollution
Authors: Bhagat S.R. , Suryawanshi G.A. , Mahajan Monali , Mahajan Lomesh S.
Published: August 2021

Undesirable scent emanations are considered as toxins which will cause inconvenient impact to the environment as well as a marker of unfortunate to influenced people coming about irritation and wellbeing related issues. These poisons are challenging to handle due to their intangibility to the exposed eye and can as it were be felt by the human jolts. A technique are available to address these issues are in artificial neural network to attain a vigorous result. The use of AI as advancement in controlling on environmental mapping. The various AI methods available for non-linear input. The AI technology is one of the striking advancement since last couple of decades for control and observed natural contamination at number of sources within stipulated timeframe. Which considered as effective elective strategies to handle the complexities of dubious, intelligently and dynamic natural issues.
Experimental and numerical prediction of California bearing ratio of expansive soil stabilized by bagasse ash and geotextile reinforcement
Authors: Rajakumar C. , Kodanda Rama Rao P. , Reddy Babu G. , Sreenivasulu A.
Published: August 2021

The target of this paper is to predict the CBR value by correlating the optimum moisture content, maximum dry density, Plasticity Index, proportion of sugarcane bagasse ash and also the variety of Geotextile layers. The linear relationships between the higher than mentioned properties and CBR worth exploitation Multiple rectilinear regression Analysis resulted during a sturdy correlation between the parameters. ANN model is developed exploitation ANN tool of MATLAB R2014a software. A multilayer perceptron network with feed forward back propagation is used to model variable the number of hidden layers. The graph aforethought between the predicted and experimental values shows that everyone the values are getting ready to equality line, indicating foreseen values are regarding the discovered values.
Identification of MDR resistance bacterial isolates from industrial wastewater
Authors: Soni Kanchan , Bagaria Ashima
Published: August 2021

One of the major environmental issues today industrial wastewater sewage and wastewater microorganisms has the ability to survive in extreme conditions and during this adaption process; they develop distinctive properties which could be of immense significance for mankind. Extremophiles come in this category and are further classified based on the environmental challenge they are facing, which constitute one of the major qualities to survive in presence of the pathogenic microorganisms. The purpose of this study is to investigate the performance of isolated bacteria with various test pathogens to get anti-microbial activity and other enzymes produced by the microbial flora in its attempt to enhance the process of microbial resistivity, three bacterial isolates showed the maximum antimicrobial activity against pathogenic bacteria, the above study showed that the isolated bacteria have MDR property and this will be further investigated with another pathogenic microorganism.
Effect of electrolyte concentrations on swelling behaviour of sand- and marble dust-bentonite mixes
Authors: Kumar Jain Ankush , Kumar Jha Arvind , Akhtar M.P.
Published: August 2021

The major concern of the impermeable landfill liner design is to retard the passage of pollutants to the ground water. So, for waste management purposes various environmental regulations are to be followed for the design of landfill liner. Sand-bentonite mixture generally used as a liner or barrier material in waste contaminates sites. Permeability, plasticity and swelling are the most important criteria’s of sand-bentonite mixture to design the liner of the waste contaminates sites. The electrolyte concentration in the pore fluid also affects the geotechnical properties of sand-bentonite mixture which ultimately impact on the regulation of the liner material. The present study attempts to investigate the effect of electrolyte concentration on swelling of sand-bentonite and marble dust bentonite mixtures.
A study on workability of silica fume and iron dust added concrete
Authors: Jain Bhupesh , Jain Vaibhav , Sancheti Gaurav
Published: August 2021

Workability of concrete is one of the important parameters which decide flowability and ease of placing the concrete. This is influenced by various factors such as shape and gradation of aggregate, water to binder ratio, admixture dosage, supplementary cementitious material, mixing time, rate of mixing, etc. Generally, slump cone test is used to decide the workability of concrete. In this paper, the effect on the workability of concrete after replacing cement with silica fume and sand with iron dust is discussed. Silica fume is replacing cement in the range of 2.5%-15% and iron dust with sand in the range of 5%-30% respectively. Also, the combined effect of silica fume and iron dust on the workability of concrete is discussed.
Exploration and Thinking on the Integrated Model of Overseas Investment, Construction and Operation of Chinese Electric Power Enterprises
Authors: Wenjing Ruan , Hanxiong Xiao , Xinxin Feng
Published: August 2021

With the advancement and implementation of the “One Belt, One Road” strategy, Chinese companies are paying more attention to the pursuit of mutual benefit and win-win development concepts overseas. The “integration of investment, construction, and operation” model that integrates project investment, planning, design, construction, and operation and maintenance has become an important transformation direction for power companies’overseas investment and a strategic choice for Chinese companies to deeply integrate into the local market and achieve sustainable development.
New Energy and Sustainable Development: A Scientometric Analysis
Authors: Cao Jidi , Qiu Rui
Published: August 2021

New energy has become a focus of public and scientific scrutiny for the sustainable development. This paper reviews related literature of new energy involving sustainable development, and studies the evolution of emerging trends by a scientometric analysis to evaluate all relevant academic publications. The literature summary is conducted and the publication trend of the related literature is revealed. Research fields of new energy and sustainable development related articles are discussed, and then literature distributions involving journals and countries are analysed. A scientometric analysis for new energy and sustainable development involves a precise observation of new energy development trends, providing new research ideas that could be extended to other fields about sustainable development.
Evaluation model of key driving factors for different types of demand side distributed power resources to participate in market transactions
Authors: Xue Song , Wu Zechen , Zhang Han , Zhang Gao , Cong Pengwei
Published: August 2021

Customer side distributed power resources are of great significance for low-cost guarantee of supply and demand balance and system peak shaving, and participation in market transactions is conducive to reducing project operation costs. Connotation and types of customer side comprehensive resources are analyzed, constructing the driving factor index system for customer side resources to participate in market transactions, including three indicators: internal rate of return of project investment, cost performance of participating in transactions and meeting their own electricity demand, and the perfection of supporting policies for participating in transactions, and evaluating the key driving factors for current relatively mature gas-fired CCHP, distributed photovoltaic power generation, electrochemical energy storage and demand side response resources to participate in market trading, putting forward the implementation path suggestions, promoting the large-scale and normalized trading of qualified customer side resources.
Research on the Path of Organizational Resources’ Utilization and Development of State-Owned Energy Enterprises in the New Era
Authors: Yue Yuanqu , Zhang Penghui , Liu Shuxiao
Published: August 2021

Under the multiple-pressure of macroeconomic situation, self-reliance of science and technology, enterprise management reform, industrial transformation and upgrading, state-owned energy enterprises need to comprehensively examine the important value of organizational resources in the development of enterprise reform and transformation. Meanwhile, on the basis of grasping the external demands, expectations and key constraints faced by state-owned energy enterprises in the new era, it is critical to clarify the evolution direction of the organizational system of state-owned energy enterprises in the new era, and find the key path for state-owned energy enterprises to tap the potential of organizational resources and introduce high-quality organizational resources.
Research on the impact of infrastructure network on urban development
Authors: Zhang Meixia
Published: August 2021

Infrastructure network is a fundamental factor of city size and urban expansion. The successful experience of many cities shows that increasing investment in infrastructure construction has significantly improved the speed and scale of urban development. Therefore, a quantitative analysis of the impact of urban infrastructure construction on urban development can lay the foundation for sustainable development of cities. This paper adopts the data of 264 cities in China from 2006 to 2018 from the aspect of road transportation network, Internet, ecological environment and industrial structure, and uses the gray correlation model and regression analysis to study the relationship and influence between China’s infrastructure and urban development.
Research on Environmental Information Disclosure of Polluting Industry Enterprises from the Perspective of Impression Management
Authors: Haiyan Zheng , Xinyu Wang
Published: August 2021

Environmental information disclosure is the main way for enterprises to convey their performance of environmental responsibility, and also an important tool for the government to carry out environmental protection work. Based on stakeholder theory, impression management theory and information asymmetry theory, this research regression analyzed the impact of corporate performance on environmental information disclosure for 112 listed companies in heavy polluting industries. The results show that the quality of environmental information disclosure of high-performing enterprises is higher than that of low-performing enterprises. The self-interested impression management greenwashing behavior adopted by enterprises in heavy polluting industries reduces the quality of environmental information disclosure. This study breaks through the previous single research from the perspective of financial information manipulation, analyzes the impression management behavior of enterprises on text information reflecting circular thinking, and enriches literature on environmental information disclosure.
A Comparative Study Between Different NCAPs and The Future of BNVSAP
Authors: Salhan Pranav , Jain Prasoon
Published: August 2021

India is the third largest road network which is used by one percent of the world’s total vehicle population. On this road network six percent of the total of global road traffic accidents occur. India is the sixth-largest car market in the world but is still the only country amongst the global top 10 car markets to not have a testing program. To reduce the number of road traffic accidents, many countries have come up with safety programmes such as Euro NCAP (New Car Assessment Program), US NCAP, Latin NCAP, etc. In 2014, Indian government proposed a similar safety assessment program called as Bharat New Vehicle Safety Assessment Program (BNVSAP) but it is since delayed in its implementation due to a number of reasons. The aim of this study is to compare existing NCAPS and the new BNVSAP and propose some improvements in it by studying the experiences gained by the older NCAPS and observing the difference in the situation of road traffic in India and in other countries by analysing real world accident data.
Multi-Response Optimization of Weld-process variables for Micro-Friction Stir Welding of Al6061(T6) and Cu101 sheets using TOPSIS method
Authors: Srujan Manohar M V N , Mahadevan K
Published: August 2021

This work is an attempt to identify the optimum weld-process variables for micro-friction stir welding of Al6061(T6) and Cu101 sheets using multi-response optimization. The experiments were conducted according to L9 orthogonal array with selected input variables namely tool-rotational speed and tool-travel speed. The response variables considered in this study are ultimate tensile strength, micro-hardness and surface-roughness which determine the strength of the welded-joint. The multi-response optimization approach namely Technique for Order Preference by Similarity to Ideal Solution(TOPSIS) method is used to determine the optimum process variables that provides the best value among all response variables. Finally, the optimal solution shows that multi-responses of micro-friction stir welds can be improved through TOPSIS method.
Comparative Study of Electric Tractor and Diesel Tractor
Authors: Dhond R , Srivastav U , Patil B T , Vaishnav H
Published: August 2021

The increase in population day-by-day causes a direct and indirect effect on country’s pollution and resources. These have adverse effects on the environment and contributes directly to climate change. A transition from an internal combustion engine to an electric vehicle is vital, since with a lot of motor and battery technology available globally. This paper focuses on different types of motors and batteries that can be sourced in India, for the conversion of a diesel tractor to an electric tractor and the running costs related to the same is compared.
An Application of Analytical Hierarchy Process in Selection of Coating Material Composition in Lost Foam Casting Process
Authors: Varshney Gagan , Husain Syed Qaisar , Raja Avinash Ravi , Bhati Girendra
Published: August 2021

In modern industrial era, the dimensional accuracy and surface finish are two major criteria in the selection of casting process. To achieve this paradise, lost foam casting is one of the casting processes. In this casting process, the shell is made by removal of expandable polystyrene or foam pattern with the application of heat. During the foam decomposition process, many problems have been generated such as bending, expansion, distending and crack of the shell. These problems may be eliminated by selecting the optimum ratio of coating materials. In this research work, zircon and aluminium silicate refractory coating materials with sodium silicate binder have been used with different composition and prepared the four test samples from them. For selection of best shell material composition, analytical hierarchy process is used.
CFD simulation of NACA airfoilsat various angles of attack
Authors: Rama Rao Y Seetha , Srujan Manohar M V N , Siva Praveen S V V
Published: August 2021

The need for more efficient design has become a main concern to work with a good range for angle of attack (AOA) to reduce the stall formation. In this project, two types of NACA series airfoils i.e., symmetrical and asymmetrical profiles depending on their usage in various sectors are compared. The profile of the airfoils is imported into ANSYS Fluent from the data files. The 2D geometry of the airfoils is simulated under two different wind velocitiesi.e., at 3m/s and 15m/s respectively. The graphs are plotted for comparing coefficients of lift (CL) and drag (CD)withrespect to the angle of attack(α) for symmetrical and asymmetrical airfoils. The stall formation with change of geometry and angle of attack is also observed.
Energy storage using NaOH phase change material for solar thermal application at constant heat flux
Authors: Kumar B , Das M K , Roy J N
Published: August 2021

There is a mismatch between energy demand by consumers and supply from the sun. Therefore, we store Solar Energy in the phase change material (PCM) for storage energy. We used medium temperature range salt, Sodium hydroxide (NaOH), melting temperature at 591 K and heat of fusion 160 kJ/kg. We did the numerical simulation using COMSOL Multiphysics®, we kept radially variable surface flux at the bottom of the container. Linearly variable flux at the centre is 78 kW/m2 and 18 kW/m2 at the periphery. For numerical analysis, we used 3D enthalpy based model. We found that the bulk temperature of NaOH reaches about 800 K after 6 hours and total energy stored by the PCM is about 21 MJ. This amount of energy is very useful for domestic and small industrial process.
Assessment of Electrical and Thermal Performance of Photovoltaic Thermal Air Collector in the Climate of Pantnagar, Uttarakhand
Authors: Samant Tarun Singh , Varshney L , Maheshwari P , Vishnoi P K , Gautam P S
Published: August 2021

The photovoltaic thermal collector (PVT) produces electricity and extracts heat from a common area exposed to solar radiation. The present work provides a methodology to assess the potential of PVT at any location. The climate of Pantnagar (a town situated in the Terai belt of Uttarakhand) is selected for the study. An unglazed PVT air heating collector is modelled, taking account of both electrical and thermal aspects of design. The performance of the collector is then simulated on four days, representing average weather of four seasons observed in North Indian Plains, in correspondence with the typical meteorological year (TMY) data of 2006-2015 for the location. The diode parameters and characteristic curves of PV module selected for PVT are obtained for reference and operating conditions. The operating temperature of solar cell and heated air are plotted after convergence of numerical solution at available data points. Finally, electrical and thermal power output of the PVT with associated optical and thermal losses are obtained. The highest electrical power output of 223 W (136 W/m2) is observed at 12:20 hours (IST) on equinox of September while highest thermal power output of 411 W (251 W/m2) is obtained at 12:20 hours (IST) on summer solstice.
Experimental Investigation of configuration types and array of external heat sources on downward spreading fires
Authors: Malhotra Vinayak , Shekhar Saumya , Thombare Bhushan , Selvakumaran T.
Published: August 2021

Scholars and scientists have been attempting to discover ways to control and lessen the reverberation of concurrent fires such as forest fires, building fires, and other various space fires but no convincing solutions have been concluded from their studies so far. The fundamental genesis of these types of fires concerns the unstable nature of the flames and considerable unpredictability associated with them. This led us to make an effort to study the etiquette of such flames – an experimental setup with rather ideal conditions was devised and an in-depth study was carried out. The present study predominately covers the study of fire propagation phenomena and the zeal of fire control in our daily life. This study includes the review of the varying regression rates and fire spread rates of flames as noticed in matchsticks when spaced in a linear orientation. The deportment instability of the flames will give us an insight into the heterogeneous fire propagation phenomenon and its control. Intuition into the heterogeneous fire propagation is expected for essential fire safety and, on its basis, an algorithm for the same is to be formulated. With this understanding along with the existing information, it might give us some possible solution to the reduction of such kinds of fires in buildings, forests, space propulsion systems and, large-scale fires in industries.
Comparison of the accuracy of DFT methods for reactions with relevance to nitrogenase
Authors: Torbjörnsson Magne , Ryde Ulf
Published: August 2021

We have studied the accuracy of 16 different density functional theory methods to reproduce experimental data for bond lengths, angles, vibrational frequencies, as well as enthalpies and entropies for the binding of N2, H2, CO and hydride ions to various transition-metal complexes (with Fe, Ni, Cr, Mo and W) with relation to nitrogenase. We show that generalized gradient approximation functionals give better structure-related parameters, whereas hybrid functionals often give better energies. However, the BLYP and B97D functionals seem to give reasonably accurate results for both types of properties. Geometries and entropies are converged with split-valence basis sets, but energies and vibrational frequencies (and therefore also thermal corrections) in general require a basis set of triple-zeta quality. Dispersion corrections are important to obtain accurate energies (contributing by up to 57 kJ mol−1), as well as structures.
A dual-memory architecture for reinforcement learning on neuromorphic platforms
Authors: Olin-Ammentorp Wilkie , Sokolov Yury , Bazhenov Maxim
Published: August 2021

Reinforcement learning (RL) is a foundation of learning in biological systems and provides a framework to address numerous challenges with real-world artificial intelligence applications. Efficient implementations of RL techniques could allow for agents deployed in edge-use cases to gain novel abilities, such as improved navigation, understanding complex situations and critical decision making. Toward this goal, we describe a flexible architecture to carry out RL on neuromorphic platforms. This architecture was implemented using an Intel neuromorphic processor and demonstrated solving a variety of tasks using spiking dynamics. Our study proposes a usable solution for real-world RL applications and demonstrates applicability of the neuromorphic platforms for RL problems.
Reaffirming the phyllocladoid affinities ofHuncocladus laubenfelsii(Podocarpaceae) from the early Eocene of Patagonia: a comment on Dörkenet al. (2021)
Authors: Andruchow-Colombo Ana , Wilf Peter , Escapa Ignacio H
Published: August 2021

We discuss a recent assessment by Dörken et al. (2021) regarding the affinities of the Eocene fossil species Huncocladus laubenfelsii from Laguna del Hunco (Patagonia, Argentina). We originally (Andruchow-Colombo et al., 2019) assigned this species to the conifer family Podocarpaceae as the first certain South American macrofossil record of the phyllocladoid lineage (Huncocladus+Phyllocladus), based on a combination of numerous macro- and micromorphological vegetative characters. However, Dörken et al. (2021) rejected the podocarpaceous affinity of H. laubenfelsii and considered it to be more closely related to the cycad genera Bowenia or Eobowenia. Their assessment was based almost entirely on two cuticular characters, with only superficial consideration of the abundant additional evidence available that included several diagnostic macromorphological features. We review the two characters mentioned by these authors, and other features, and find that their suggestion is contradicted by the available evidence, maintaining our original assignment. Critical characters include presence/absence of a midvein, secondary venation pattern, arrangement and general morphology of the photosynthetic structures, and morphology and disposition of epidermal cells.
ECCO Topical Review on Clinicopathological Spectrum and Differential Diagnosis of Inflammatory Bowel Disease
Authors: Feakins Roger , Torres Joana , Borralho-Nunes Paula , Burisch Johan , Cúrdia Gonçalves Tiago , De Ridder Lissy , Driessen Ann , Lobatón Triana , Menchén Luis , Mookhoek Aart , Noor Nurulamin , Svrcek Magali , Villanacci Vincenzo , Zidar Nina , Tripathi Monika
Published: August 2021

Introduction

Many diseases can imitate inflammatory bowel disease [IBD] clinically and pathologically. This review outlines the differential diagnosis of IBD and discusses morphological pointers and ancillary techniques that assist with the distinction between IBD and its mimics.

Methods

European Crohn’s and Colitis Organisation [ECCO] Topical Reviews are the result of an expert consensus. For this review, ECCO announced an open call to its members and formed three working groups [WGs] to study clinical aspects, pathological considerations, and the value of ancillary techniques. All WGs performed a systematic literature search.

Results

Each WG produced a draft text and drew up provisional Current Practice Position [CPP] statements that highlighted the most important conclusions. Discussions and a preliminary voting round took place, with subsequent revision of CPP statements and text and a further meeting to agree on final statements.

Conclusions

Clinicians and pathologists encounter a wide variety of mimics of IBD, including infection, drug-induced disease, vascular disorders, diverticular disease, diversion proctocolitis, radiation damage, and immune disorders. Reliable distinction requires a multidisciplinary approach.
Methodology for the development of international clinical data standards for common cardiovascular conditions: European Unified Registries for Heart Care Evaluation and Randomised Trials (EuroHeart)
Authors: Batra Gorav , Aktaa Suleman , Wallentin Lars , Maggioni Aldo P , Wilkinson Chris , Casadei Barbara , Gale Chris P
Published: August 2021

Aims

Data standards are consensual specifications for the representation of data arising from different sources. If provided with internationally harmonized variables, permissible values, and clinical definitions, they have the potential to enable reliable between- and within-country analysis of care and outcomes. The European Unified Registries for Heart Care Evaluation and Randomised Trials (EuroHeart) is a European Society of Cardiology project that allows participating countries to collect patient data to undertake quality improvement, observational studies, drug and device surveillance, and registry-based randomized controlled trials for cardiovascular conditions. This paper describes the methodology for development of harmonized data standards for EuroHeart.

Methods and results

We adopted a five-step process for the development of harmonized data standards. The process includes (i) identification of clinical domains for data standard development by evaluating specific cardiovascular conditions with high prevalence and opportunities for quality improvement; (ii) construction of data standard specifications by systematic review of the literature; (iii) selection of variables by a domain-specific Working Group using a modified Delphi method; (iv) validation of data standards by a domain-specific Reference Group; and (v) implementation of the developed data standards into an IT platform.

Conclusion

This paper describes the approach adopted by EuroHeart for the development of clinical data standards for cardiovascular disease. The methodology has been developed and is used by EuroHeart to create a suite of international data standards for cardiovascular diseases. The EuroHeart data standards may be used to systematically capture individual patient data about clinical care and for research.
DGCR8 microprocessor defect and deregulation of its expression in thyroid cancer
Authors: Rodrigues Lia , Dias Carolina , Macedo Sofia , Soares Paula , Vinagre João
Published: August 2021

Background

The alteration of microRNA (miRNA) processing is a driver event in several tumors including thyroid cancer (TC). Upon the discovery of DICER mutations affecting the miRNA biogenesis in TC, other genes encoding proteins with similar functions have been studied. The DiGeorge Critical Region 8 (DGCR8) gene holds a critical role in miRNA biogenesis as a microprocessor complex component. Previous studies identified a hotspot DGCR8 mutation - the variant c.1552G > A (p.E518K) that alters canonical miRNA production. As miRNAs are necessary to accurately establish thyroid follicles and hormone synthesis, the deregulation of their expression are common in TC. The goal of this study was to characterize the variant p.E518K of DGCR8 in thyroid lesions and evaluate its expression.

Methods

242 samples of 214 patients with tumor or tumor-like lesions of thyroid were evaluated by direct sequencing for the presence of c.1552 G > A (p.E518K). Formalin-fixed paraffin embedded (FFPE) sections of these lesions were studied for DGCR8 immunoexpression. When frozen tissue was available, DGCR8 mRNA expression was analyzed by quantitative PCR (qPCR).

Results

The presence of the variant c.1552G > A (p.E518K) was a rare event in our series. Only 1 case was found mutated, and it corresponded to a poorly differentiated thyroid carcinoma (PDTC). Unexpectedly, mRNA DGCR8 expression and DGCR8 expression shown an aberrant expression in PDTC cases which could lead to a miRNA downregulation.

Conclusions

The results obtained so far point that DGCR8 may have a role in thyroid carcinogenesis. Although mutations are rare, aberrant expression affecting miRNA expression seems to be a common event.
Potentially inappropriate medicines use in older adults
Authors: Figueiredo Inês , Cruz Rui
Published: August 2021

Background

With the increase of the average life expectancy, and the increase in chronic diseases, consequently also increases the consumption of medicines. Polymedication leads to an increase in drug-related problems, particularly in the elderly. Prescription of medications potentially inappropriate, which can have a harmful impact on the quality of life of the elderly. The aims are identifying and classify potentially inappropriate medication according to the recent criteria of Beers.

Methods

We conducted an observational study in the nursing home. The sample consisted of 45 seniors of 65 years of age or older, take at least two different mediations at the same time. The data collection was made to a questionnaire with sociodemographic characteristics and clinical profile.

Results

The female sex predominates with 32 people (71.1%), with a very high average age (86.02 years ± 7.6). In the 45 respondents it appears that they take a minimum of 4 drugs (2.2%) and a maximum of 16 (4.4%), with an average of 9.7 daily drugs per individual. The most prescribed drugs are for the nervous and the cardiovascular system, and 34 drugs were considered potentially inappropriate medication use in older adults, 23 drugs of which were recommended to be avoided and the rest were recommended to be used with caution and dose reduction.

Conclusions

It is necessary more personalised criterion for prescription and dispensation of medication to elderly people. It is necessary to develop habits and practices that create higher prudence when prescribing medication and its rational use.
Antibacterial bioglass in dental implants: a canine clinical study
Authors: Gavinho Silvia , Graca Manuel , Prezas Pedro , Borges João , Silva Jorge , Pires Eduardo , Armes Henrique , Coucelo Jose
Published: August 2021

Background

Peri-implantitis is considered the most challenging biological complication in implantology, as untreated disease can progress and result in implant loss. Therefore, disease prevention is crucial in daily clinical practice. It has been reported that the use of bioactive glass, as an implant coating, can stimulate tissue integration and accelerate tissue regeneration. Besides these properties, it is possible to promote bacterial activity by inserting silver into the bioglass

Methods

Bioglass with composition 45S5 was synthesised by the fusion method, replacing the amount of Na2CO3 by AgNO3 (BG 2% wt). The implants were resealed by the CoBlast® technique. Clinical cases with pathology of the mandible/maxilla were selected and implants dimensioned for the canine bone structure were applied.

Results

Three months after implantation, imaging exams, namely CT scans, showed no signs of early rejection by septic or cytotoxic loss. No decrease or loss of peri-implant bone was observed. In all cases the implants remained without signs of instability, and with sufficient support for the application of the exo-prosthesis or dental crown. The results of histological analysis showed no signs of infection or osteolysis. The zone of peri-implant fibrosis was not observable in the samples, showing a good evolution in implant osteointegration.

Conclusions

The results show promising evidences for the use of this biomaterial as a coating, since aseptic rejection, later on, and that related to the shape and biomaterials used in the implant's design, usually begins during the first 3 months.