bluuebunny/crossref_metadata_2025 huggingface dataset:
Sensitivity analysis based artificial neural network approach for global solar radiation prediction in India
Authors: Meenal Rajasekaran , Selvakumar A. Immanuel , Michael Prawin Angel , Rajasekaran Ekambaram
Published: August 2020

The objective of this paper is to build an artificial neural network model to predict Global Solar Radiation (GSR) with improved accuracy using less number of best input parameters selected using sensitivity analysis. In this work, the input parameters used for training the artificial neural network (ANN) models are bright sunshine duration, maximum and minimum temperature, day length, months, extra terrestrial radiation (H0), relative humidity and geographical parameters of the locations namely the latitude and longitude. Sensitivity analysis is used to discover how the output data are influenced by the changeability of the input data.Three ANN models namely   T-ANN, S-ANN and TS-ANN are proposed with most suitable input parameters selected using sensitivity analysis. The principle of this feature selection using sensitivity analysis is to improve the prediction accuracy of solar radiation models with less number of inputs. The proposed ANN model is also tested under noisy data and proved that ANN is able to perform reasonably good in GSR prediction on practical applications where the data is affected by noise caused by errors on measuring, fault of data acquisition system, recording problems, and so on.
Fast lightweight block cipher design with involution substitution permutation network (SPN) structure
Authors: A. Dawood Omar
Published: August 2020

In the present paper, a new cryptographic lightweight algorithm has been developed for the Internet of Things (IoT) applications. The submitted cipher designed with the involution Substitution Permutation Network SPN structure. The involution structure means that the same encryption algorithm is used in the decryption process except the ciphering key algorithm is applied in reverse order. The introduced algorithm encrypts the data with a block size of 128-bit 192-bit or 256-bit, which iterative with 10, 12 and 14-rounds respectively similar to the AES cipher. The design aspect supports an elegant structure with a secure involution round transformation. The main round is built without S-Box stage instead that it uses the on-fly immediate computing stage and the involution of mathematical invertible affine equations. The proposed cipher is adopted to work in a restricted environment and with limited resources pertaining to embedded devices. The proposed cipher introduces an accepted security level and reasonable Gate Equivalent (GE) estimation with fast implementation.
Multimodal access control system combining RFID, fingerprint and facial recognition
Authors: El Beqqal Mohamed , Azizi Mostafa , Louis Lanet Jean
Published: August 2020

Monomodal biometry does not constitute an effective measure to meet the desired performance requirements for large-scale applications, due to limita-tions such as noisy data, restricted degree of freedom and unacceptable error rates. Some of these problems can be solved through multimodal biometric systems that involve using a combination of two or more biometric modali-ties in a single identification system. Identification based on multiple biomet-rics represents an emerging trend. The reason for combining different modal-ities is to improve the recognition rate. In practice, multi-biometric aims to reduce the False Acceptance Ratio (FAR) and False Rejection Ratio (FRR) which are two standard metrics widely used in the accuracy of biometric sys-tems. In this paper, we will examine the different possible scenario in multi-modal biometric systems using RFID, fingerprint and facial recognition, that can be adopted to merge information and improve the overall accuracy of the system.
Multiverse optimisation based technique for solving economic dispatch in power system
Authors: Haziq Suhaimi Muhammad , Musirin Ismail , Hidayab Muzaiyanah , Jelani Shahrizal , Helmi Mansor Mohd
Published: August 2020

Economic dispatch (ED) is one of the many important components in a power system operation. It is designed to calculate the exact amount of power generation needed to ensure a minimum cost of generation. A power system with multiple generators should be running under an economic condition. The operating cost has to be minimised for any feasible load demand. The increase of power demand is getting higher throughout the year. Economic dispatch is used to schedule and control all output of the fossil-fuel or coal-generators to satisfy the system load demand at a minimum cost. This paper presents the Multiverse Optimisation (MVO) for solving the economic dispatch in a power system. The proposed Multiverse optimisation engine developed in this study is implemented on the IEEE 30-Bus Reliability Test System (RTS). It has five generators, all of which are denoted as the control variables for the optimisation process. To reveal the superiority of MVO, a similar process was conducted using Evolutionary Programming (EP). Results from both techniques were compared, and it was revealed that MVO had outperformed EP in terms of reduced cost of generation for the system.
ICT-supported for participatory engagement within E-learning community
Authors: Natrah Aziz Noor Hida , Haron Haryani , Fathiyah Harun Afdallyna
Published: August 2020

This paper presents ICT-supported for participatory engagement learning within the e-learning community. Effectively tools in e-Learning facilitate interactive learning and the achievement of desired learning outcomes for learners. However, the intensity of its usage is not very remarkable; there is a need to understand ICT- supported for learners from the perspectives of participatory engagement. Therefore, integrating suitable technology into e-learning is expected to strengthen learner's engagement within the e-learning community. The objective of the study is to identify technology that could effectively support learners' engagement. This study analyzes the available technology in the market to integrate into e-learning using the technology evaluation process. Interview sessions with experts were held to validated and suggested other technology uses in e-learning. This research is carrying out with three experts (academic staff) of the e-technologies within the University. This study uses semi-structured interviews to captured expert suggestions, knowledge, and expertise about technologies. Understanding learner's requirements toward technology are essential to ensure learners can reap the benefits of technology usage.  This study uses a thematical analysis to identify and organize key themes from qualitative data. The result reveals mobile technology, wireless technology, live streaming technology, authoring tool, summative assessment, cloud computing, gamification and Instagram is suitable technologies that support participatory engagement activities.
Developing a real time navigation for the mobile robots at unknown environments
Authors: Haider Abdulredah Sarah , Jasim Kadhim Dheyaa
Published: August 2020

This research deals with the feasibility of a mobile robot to navigate and discover its location at unknown environments, and then constructing maps of these navigated environments for future usage. In this work, we proposed a modified Extended Kalman Filter- Simultaneous Localization and Mapping (EKF-SLAM) technique which was implemented for different unknown environments containing a different number of landmarks. Then, the detectable landmarks will play an important role in controlling the overall navigation process and EKF-SLAM technique’s performance. MATLAB simulation results of the EKF-SLAM technique come with better performance as compared with an odometry approach performance in terms of measuring the mean square error, especially when increasing the number of landmarks. After that, we simulate and evaluate a mobile robot platform named TurtleBot2e in Gazebo simulator software to achieve the using of the SLAM technique for a different environment using the Rviz library which was built on Robot Operating System in Linux. The main conclusion comes with this work is the simulation and implementation of the SLAM technique using two software platforms separately (MATLAB and ROS) in different unknown environments containing a different number of landmarks so a few number of landmark will make the mobile robot loses its path.
A Review of Control Algorithm for Autonomous Guided Vehicle
Authors: Gul Faiza
Published: August 2020

The autonomous guided vehicle is a efficient and
effective platform for control system. Their non-linear nature helps
in analysing the control algorithms more efficiently and effectively.
The main objective of path planning is to find the optimal and
shortest path avoiding the time complexity so environment can be
modelled completely for vehicle. The paper includes explanation
of different systems together with numerous algorithms have been
discussed with advantages and disadvantages for example: Fuzzy
control, Neural Control, Back-stepping control, Adaptive control,
Sliding mode control and PID control and linear quadratic regulator.
The conclusion includes the hybrid system integration based
on the advantages and disadvantages presented in this paper.
E-wallet: factors influencing user acceptance towards cashless society in Malaysia among public universities
Authors: Abdullah Norulhuda , Redzuan Fauziah , Aziah Daud Nor
Published: August 2020

The evolution of financial technology into digital payment has led to a new era of cashless society. In line with the global trend, the Malaysian Government has been committed to strengthen the agenda of a cashless society by actively promoting the use of e-Wallet through the establishment of the Interoperable Credit Transfer Framework (ICTF) policy in 2018. Although e-Wallet has been implemented since 2016, several previous studies have found that the level of acceptance is still relatively low while the main factors that influence the acceptance of e-Wallet in Malaysia still remain unclear. This study aims to identify the factors that influence the acceptance of e-Wallet towards establishing cashless society in Malaysia. Online survey using closed-ended questionnaires have been conducted among 400 respondents from students and employees of Malaysian public universities in Klang Valley. Collected data have been analyzed using descriptive statistics and inferential statistics which consist of Factor Analysis, Pearson Correlation and Multiple Linear Regression in Statistical Package for the Social Sciences (SPSS). Based on the findings, four factors are found to significantly influence e-Wallet acceptance, which consist of Performance Expectancy (PE), Social Influence (SI), Facilitating Conditions (FC) and Trust (T). Facilitating Conditions (FC) is the most influential significant factor behind the acceptance of e-Wallet among Malaysians.
IMU sensor-based data glove for finger joint measurement
Authors: Wa’ie Hazman Muhammad Ajwad , Aimi Mohd Nordin Ili Najaa , Mohd Noh Faridah Hanim , Khamis Nurulaqilla , M. Razif M. R. , Athif Faudzi Ahmad , Mohd Hanif Asyikin Sasha
Published: August 2020

The methods used to quantify finger range of motion significantly influence how hand disability is reported. To date, the accuracy of sensors being utilized in data gloves from the literature has been ascertained yet need further analysis. This paper presents an inertial measurement unit sensor-based data glove for finger joint measurement developed for collecting a range of motion data of distal interphalangeal, proximal interphalangeal and metacarpophalangeal finger joints of an index finger. In this study, three inertial measurement sensors, MPU-6050 and two flexible bend sensors which are capable to detect angle displacement were attached to the distal interphalangeal, proximal interphalangeal and metacarpophalangeal finger joint points on the glove. The data taken from inertial measurement unit sensors and flexible bend sensors were acquired using Arduino and MATLAB software interface. The data obtained were compared with the reference data measured from goniometer to allow for accurate comparative measurement. The percentage of error resulted from MPU-6050 sensor unit were ranged from 0.81 % to 5.41 % were very low which indicates high accuracy when compared with the measurements obtained using goniometer. On the other hand, flexible bend sensor shows low accuracy (11.11 % to 19.35 % error). In conclusion, the inertial measurement unit sensor-based data glove using MPU-6050 sensors can be a reliable solution for tracking the progress of finger rehabilitation exercises. In order to motivate patients to adhere to the therapy exercises, interactive rehabilitation game will be developed in the future incorporating  MPU-6050 sensors on all five fingers.
Transient analysis of systems exhibiting inverse response and their control with CSTR as a case study
Authors: Lakhani Rohan , Srinivasan C. R. , R Srividya
Published: August 2020

In this paper the phenomenon of inverse response from systems was investigated and its transient response thoroughly analyzed. Inverse response is shown by non-minimum phase systems and some minimum phase systems. Transient analysis of these systems is lacking in literature A case study was done for a non-linear, non-minimum phase CSTR (Continuous Stirred Tank Reactor), which was identified and a novel optimized trajectory for temperature feed was synthesized, which is a non-linear dynamic constrained optimization problem solved using ACADO for a particular chemical reaction. Different control schemes were also implemented on other systems as well, which exibhit inverse responses, including model reference adaptive control. The finding shows that PID-ZN goes with the inverse response, is unable to suppress it and requires large control effort which can have serious hardware limitations. Robustness is another area where PID is lacking with these systems. MRAC shemes were able to overcome all these issues. For CSTR also, these findings hold true thus points at using advance stratigies in process control industries for maximzing product yield.
A variant of hybrid conjugate gradient methods based on the convex combination for optimization
Authors: Hassan Basim Abbas , Owaid Ahmed Obeid , Yasen Zena T.
Published: August 2020

On some studies a conjugate parameter plays an important role for the conjugate gradient methods. In this paper, a variant of hybrid is provided in the search direction based on the convex combination. This search direction ensures that the descent condition holds. The global convergence of the variant of hybrid is also obtained. Our strong evidence is a numerical analysis showing that the proposed variant of hybrid method is efficient than the Hestenes and Stiefel method. 
Utilizing the ATM technology in e-distance learning
Authors: Abbas Hieder Inaam , Mohammad Abdullah Sara , Ahmed Ali Rawaa
Published: August 2020

There is an Increasing demand for the education in the field of E-learning specially the higher education, and to keep contiuity between the user and the course director in any place and time. This research presents a proposed and simulation multimedia network design for distance learning utilizing ATM technique. The propsed framework determines the principle of ATM technology and shows how multimedia can be integrated within E- learning conteext. The first part of this research presents a theoretical design for the Electricity Department, university of technology. The purpose is to illustrate the usage of the ATM and Multimedia in distance learning process. In addition, this research composes two entities: Software entity by using image, sound and a mix between them to be transfered across the ATM network.. The MATLAB was used to validate the implementation of the required design objectives: (hardware entity) where a prototype is designed (experimental trial) , which aims to carry out the connectivity process between the user and course director, where multiple PCs are connected via unshielded twisted pair (UTP) and a web camera with microphone have been attached to PCs. To finalize this stage, an interface is implemented to show the data transmission process for multimedia by the ATM network and it has been realized through the Visual Basic language. Finally, to validate the level of success by using the ATM technique, some important factors have been determined through the analysis phase, which are: time delay, throughput and efficiency. The propsed design manages to minimize the impat of noise and improve the throuput ratio by 30% while minizing the delay with a ratio of 22%.
Clotting detection in the vascular network
Authors: A. Salman Shatha , Abd-Almeer Abeer H.
Published: August 2020

A lot of side effects accusers which the humans have suffered from a scan either by CT phrases, rays and magnetic resonance. Different methods were used to eliminate these affects depends on segmentation of vascular networks then represents it as a graph, where the intersection of the vessel as a vertex and the line between them as an edge. The place of the clot can be found by representing the weight of each edge as the amount of the blood in the vessel. Sign the place; if the amount is less than the normal flux that represents thrombosis. An algorithm in a graph theory is used to find the minimum distance, if more than one thrombosis exists to reach the nearest one and sign it alternately.
Review of space charge measurement by pulsed electro-acoustic technique
Authors: Asyraf Shee Kandar Mohd Haris , Mohd Jamail Nor Akmal , Azlin Othman Nordiana , Ezani Kamarudin Qamarul , Mohd Jamail Nor Shahida , Bagchi Susama
Published: August 2020

Pulsed electro-acoustic (PEA) is well known as a non-destructive technique for testing and describing space charge profiles in the insulation. Degradation due to moisture, ageing, external flashover, partial discharge and space charge are considered as insulation defects that is an issue in high voltage insulator. Space charge may distort the internal electric field that may lead to an electrical breakdown. For instance, a method based on an acoustic phenomenon can be used to describe the space charge profiles. This paper compares several earlier researches on different specimen of PEA method and reviews their results to find the space charge distribution profiles. The scope of the review includes types of methods used. The acoustic technique is considered for this study. It has been observed that the PEA technique successfully gives the same result as theoretical that is based on the obtained profile. Linear low-density polyethylene (LLDPE) composite demonstrates about 89 % lower charge density value compared to cross-linked polyethylene (XLPE) and polypropylene (PP) composite. While the electric field value of ethylene-vinyl acetate (EVA) sample is 75 % lower than low-density polyethylene (LDPE) sample. This study found that the time interval, specimen thickness and the electric field sway the space charge profiles. 
Comparison of microarray breast cancer classification using support vector machine and logistic regression with LASSO and boruta feature selection
Authors: Mohd Ali Nursabillilah , Ab Aziz Nor Azlina , Besar Rosli
Published: August 2020

Breast cancer is the most frequent cancer diagnosis amongst women worldwide. Despite the advancement of medical diagnostic and prognostic tools for early detection and treatment of breast cancer patients, research on development of better and more reliable tools is still actively conducted globally. The breast cancer classification is significantly important in ensuring reliable diagnostic system. Preliminary research on the usage of machine learning classifier and feature selection method for breast cancer classification is conducted here. Two feature selection methods namely Boruta and LASSO and SVM and LR classifier are studied. A breast cancer dataset from GEO web is adopted in this study. The findings show that LASSO with LR gives the best accuracy using this dataset.
Low power design of ultra wideband PLL using 90 nm CMOS technology
Authors: Noor Al Amin Fadhilah Binti , Ahmad Nabihah , Ruslan Siti Hawa
Published: August 2020

The rapid growth of the electronic system has become one of the challenges in the high performance of Very Large Scale Integration (VLSI) design and has contributed to the evolution of Phase Locked Loop (PLL) system design as one of the inevitable and significant necessities in the modern days. This design focus on the development of PLL system that can operate at a high performance within the Ultra-Wideband (UWB) frequency but consume low power that may be useful for future device implementation in the communication system. All proposed sub modules of PLL is highly suitable for low power and high speed application as each of them consumes overall power consumption around 2 µW until 1 mW with frequency from 3.1 GHz to 10.6 GHz. All the design architecture, schematic, simulation and analysis are implemented using Synopsys Tool in 90 nm CMOS technology. Through the overall analysis, it can be concluded that this proposed sub modules design of the PLL system has better performance compared to previous work in terms of power consumption and frequency.
Economic power dispatch for an interconnected power system based on reliability indices
Authors: Athab Falah Abodahir , Majeed Wafaa Saeed
Published: August 2020

Reliability indices are always one of the most important factors in the  power systems. In this paper, the problem of the economic load dispatch (ELD) and the problem of economic emission load dispatch (CEELD) have been improved taking into account reliability indices. That is, the problem and reliability of ELD are proposed as  combined economic load dispatch reliability (CELDR) and the problem CEELD is suggested as (CEELDR). In solving CELDR and CEELDR problems, tried to use power generators in a very reliable way to save system load, as well as minimum fuel and emission costs. In this effort, the ELD of power plants is successfully implemented in a single system containing 6 generating units, taking into account the reliability and emissions of the system with and without system power loss, inequality and inequality constraints, and valve point effects using the exchange market algorithm(EMA). The results suggest that reliability indicators in ELD can be used to create greater reliability in providing consumers with uninterrupted power.
TRIGA PUSPATI reactor: model analysis and accuracy
Authors: Abdullah Nor Arymaswati , Che Soh Azura , Mohd Noor Samsul Bahari , Abd. Rahman Ribhan Zafira , Abd Karim Julia
Published: August 2020

There are many challenging issues with research reactor, such as time variation and uncertainty. Since its first criticality in 1982, the biggest changes in TRIGA PUSPATI Reactor system is the replacement of instrumentation and control console system from analogue to digital in 2013. Apart from providing methods of controlling the power reactor via the control rod movement, the Instrumentation and Control Console System also provides monitoring and display for all reactor parameters to protect the reactor from undue influences or abnormal circumstances. Meanwhile, the simulation model of the TRIGA PUSPATI Reactor system has been developed in the Simulink-MATLAB. The simulation model development is based on the research reactor mathematical representatives and the real plant parameters of TRIGA PUSPATI Reactor. However, the performance of this simulation model needs to be evaluated. Since there is no report or paper work found on the performance of the simulation model to represent the real system of RTP, the present study aims to carry out an analysis for more rigorous understanding of the TRIGA PUSPATI Reactor model simulation through validation and verification methods. After analysing the result, it was found that the simulation model has a good representation of a real plant.
A comparative study of hyperspectral unmixing using different algorithm approaches
Authors: Mohd Yusof Ain Zat , Abdul Manap Redzuan , Majid Darsono Abdul
Published: August 2020

Hyperspectral unmixing (HU) is an important technique for remotely sensed hyperspectral data exploitation. Hyperspectral unmixing is required to get an accurate estimation due to low spatial resolution of hyperspectral cameras, microscopic material mixing, and multiple scattering that cause spectra measured by hyperspectral cameras are mixtures of spectra of materials in a scene. It is a process of estimating constituent endmembers and their fractional abundances present at each pixel in hyperspectral image. Researchers have devised and investigated many models searching for robust, stable, tractable and accurate unmixing algorithm. Such algorithm are highly desirable to avoid propagation of errors within the process. This paper presents the comparison of hyperspectral unmixing method by using different kind of algorithms. These algorithms are named VCA, NFINDR, SISAL, and CoNMF. The performance of unmixing process is evaluated by calculating the SAD (spectral angle distance) for each endmembers by using same input of hyperspectral data for different algorithm.
Effects of Soil Profile on the Transient Performance of Substation Grounding System
Authors: Malek Zulkurnain Adul , Yaman Mohammad Shahrin Affendy , Adnan Muhammad
Published: August 2020

Lightning transient characteristic of the grounding grid is fundamental for optimum performance of lightning protection of a substation. In order to design an appropriate grounding system for such substation, it is important to study its transient characteristics because the high impulse current is significantly different compared to power frequency current. In this paper, substation grounding grid model was developed using CDEGS software to analyze the grid transient performance in terms of ground potential rise (GPR), touch voltage and step voltage when the grounding system is struck by a lightning impulse current. Several parameters, such as lightning current amplitude, feed point and the number of sub-grids, were altered to study their relationship with the transient performance. The maximum transient GPR, touch voltage, and step voltage increase as the lightning current amplitude increase. The maximum transient GPR and step voltage are the highest at the corner of the grounding grid while the maximum touch voltage is the highest at the centre of the grounding grid. In addition, the maximum transient GPR and step voltage decrease when the number of sub-grid increases. In contrast, the touch voltage slightly increases as the number of sub-grid increases. The maximum transient GPR, and step voltage are the highest at the 2-layer and the lowest at the uniform soil or single-layer soil.
Compare encryption performance across devices to ensure the security of the IOT
Authors: Pyrkova A.YU. , Temirbekova ZH.E.
Published: August 2020

The Internet of Things (IoT) combines many devices with various platforms, computing capabilities and functions. The heterogeneity of the network and the ubiquity of IoT devices place increased demands on security and privacy protection. Therefore, cryptographic mechanisms must be strong enough to meet these increased requirements, but at the same time they must be effective enough to be implemented on devices with disabilities. One of the limited devices are microcontrollers and smart cards. This paper presents the performance and memory limitations of modern cryptographic primitives and schemes on various types of devices that can be used in IoT. In this article, we provide a detailed assessment of the performance of the most commonly used cryptographic algorithms on devices with disabilities that often appear on IoT networks. We relied on the most popular open source microcontroller development platform, on the mbed platform. To provide a data protection function, we use cryptography asymmetric fully homomorphic encryption in the binary ring and symmetric cryptography AES 128 bit. In addition, we compared run-time encryption and decryption on a personal computer (PC) with Windows 7, the Bluetooth Low Energy (BLE) Nano Kit microcontroller, the BLE Nano 1.5, and the smartcard ML3-36k-R1.
Modelling foreign exchange rates: a comparison between markov-switching and markov-switching GARCH
Authors: Nunian Mohd Azizi Amin , Zahari Siti Meriam , Shariff S.Sarifah Radiah
Published: August 2020

Foreign exchange rate is important as it determines a country's economic condition. It is used to carry out transfers of purchasing power between two or more countries. Volatility in exchange rates may result in difficulty in decision making especially, in financial sectors as high volatility could increase the risk in exchange rates. Thus, Markov switching model is employed in this study as it is believed to be efficient in handling not only volatilility but also nonlinearity characteristics in exchange rates. The aims of this study are to model the foreign exchange rates using two models; Markov Switching (M-S) models and Markov Switching Generalized Autoregressive Conditional Heteroscedasticity (M-S GARCH) and to compare these two models based on log-likelihood, AIC and BIC criteria. This study used the quarterly data of foreign exchange rates for Singapore Dollar (SGD), Korean Won (KRW), China Yuan Renminbi (CNY), Japanese Yen (JPY) and the US Dollar (USD) against Malaysia Ringgit (MYR) which were collected from Quarter 4, 2006 to Quarter 1, 2018. The findings indicate that Markov Switching is the best model since it has the highest log-likelihood value, and the lowest AIC and BIC values. The results show that JPY and SGD have highly persistent trends on regime 1 with probability values 0.96 and 0.84, respectively as compared to CNY, KRW and USD, while the latter have high persistent trends on regime 2 with probability values, 0.99, 0.95, 0.82, respectively.
Reliable data transmission: An IoT health-based paradiam
Authors: Abdulmohsin Hammood Dalal , Shuker Mahmoud Mahmoud , Alkhayyat Ahmed , A. Rahim Hasliza , Badlishah Ahmad R.
Published: August 2020

A WBAN can be spread over a person's body, so; posing, dressing, moving of muscles, degree of heat of bodies as well as weather changes in general affect connections among sensors as well as desired point. Secondly, information collected via every sensor can be connected to a person's course of life; so, it can be considered as significant to guarantee that the collected information ought to be given to desired point competently. In this work, a critical cooperating communicating protocol to WBAN established on information has been suggested, called critical Data Transmission using Transmission Mode Selection (CD-TMS) method established for the architecture of star topology. In the beginning, we performed a studying, also we established a system model can be looked at according to channel los of path, effective transmitting possibility, as well as the out of work time possibility. Thirdly, relaying selecting can be used accompanied by CD-TMS, that lets just the most successful relaying take part in cooperating in a spread manner. Simulating as well as numeral outcomes illustrate that CD-TMS has the ability to develop the performing of a network under common terms comparing with direct transmission mode (DTM) IEEE 802.15.6 CSMA as well as benchmark.
«No he sido juvenólogo»: una conversación con Carlos Mario Perea
Authors: Perea Carlos Mario , Feixa Carles
Published: August 2020

El artículo aborda la trayectoria del historiador colombiano Carlos Mario Perea, centrándose en sus aportaciones a los estudios sobre juventud. A partir de una conversación con Carles Feixa, se reconstruyen las principales etapas de su vida, como joven, militante político e investigador, desde sus recuerdos como estudiante en la Bogotá de los años setentas, hasta su compromiso con el proceso de paz en los últimos años, pasando por su militancia en el M-19, su trabajo en organizaciones de base en Medellín en los años ochentas, su trayectoria académica en el Instituto de Estudios Políticos y Relaciones Internacionales y sus incluyentes estudios sobre pandillas juveniles. El texto concluye con una lúcida crítica sobre los aportes y déficits teóricos de la juvenología latinoamericana y con una emotiva reflexión sobre la relación del juvenólogo —que no se reconoce como tal— con sus propios hijos.
Dinâmica de curto prazo do desmatamento da Amazônia Legal: análise do papel das políticas públicas no período de 2000 a 2010
Authors: Diniz Marcelo Bentes , Diniz Márcia Jucá Teixeira , Silva Almir Bittencourt da , Simões Jorge Eduardo Macedo
Published: August 2020

Discute-se, em um contexto de um painel dinâmico, GMM-SYSTEM, os determinantes de curto prazo na dinâmica do desmatamento na Amazônia Legal no período de 2000 a 2010, ao encontro de testar o papel das políticas públicas relacionadas ao controle do desmatamento e a política de assentamentos destinados à Reforma Agrária na região. As evidências encontradas confirmam a importância da política regulatória no controle do desmatamento, enquanto a política de assentamentos mostrou-se não significante.
Determinantes do aproveitamento final de pontos das equipes nos campeonatos brasileiro e argentino de futebol
Authors: Alves Jacy De Freitas , Cirino Jader Fernandes , Cunha Cassuce Francisco Carlos da
Published: August 2020

O estudo analisa os determinantes do aproveitamento percentual de pontos dos times ao final dos campeonatos brasileiro e argentino de futebol da primeira divisão no período 2006-2017. Através da regressão beta, verificou-se que o valor de mercado médio dos jogadores da equipe, entendido como proxy da qualidade do elenco, e a manutenção do mesmo treinador ao longo do campeonato foram cruciais para o melhor desempenho dos clubes nas duas ligas. Portanto, visando aumento de receitas para os clubes na forma de premiação e venda de ingressos, produtos licenciados e programas de sócio-torcedor, os gestores devem considerar fortemente tais variáveis.
Determinantes da ecoinovação nas empresas brasileiras: uma análise empírica
Authors: Ervilha Gabriel Teixeira , Vieira Wilson Da Cruz , Fernandes Elaine Aparecida
Published: August 2020

O objetivo deste trabalho é analisar, por meio do método econométrico logit ordenado multinível e da Pesquisa de Inovação (PINTEC 2014), os determinantes da ecoinovação na indústria de transformação brasileira. Os resultados indicaram a importância das heterogeneidades setoriais na probabilidade das empresas ecoinovarem, além dos fatores individuais das firmas. Nesse sentido, sugere-se que o fortalecimento de ações de P&D, os investimentos públicos, a maior interação entre instituições de pesquisa e ensino comas empresas e instrumentos regulatórios específicos podem contribuir para se ter uma indústria de transformação mais aberta a práticas eficientes de gestão ambiental.
Real‐World Analysis of Guideline‐Based Therapy After Hospitalization for Heart Failure
Authors: Wirtz Heidi S. , Sheer Richard , Honarpour Narimon , Casebeer Adrianne W. , Simmons Jeff D. , Kurtz Christopher E. , Pasquale Margaret K. , Globe Gary
Published: August 2020

Background

Patients hospitalized with heart failure (HF) with reduced ejection fraction have high risk of rehospitalization or death. Despite guideline recommendations based on high‐quality evidence, a substantial proportion of patients with HF with reduced ejection fraction receive suboptimal care and/or do not comply with optimal care following hospitalization.

Methods and Results

This retrospective observational study identified 17 106 patients with HF with reduced ejection fraction with an incident HF‐related hospitalization using the Humana Medicare Advantage database (2008–2016). HF medication classes (beta‐blockers, angiotensin‐converting enzyme inhibitors, angiotensin receptor blockers, angiotensin receptor neprilysin inhibitors, or mineralocorticoid receptor antagonists) received in the year after hospitalization were recorded, and categorized by treatment intensity (ie, number of concomitant medication classes received: none [23% of patients; n=3987], monotherapy [22%; n=3777], dual therapy [41%; n=7056], or triple therapy [13%; n=2286]). Compared with no medication, risk of primary outcome (composite of death or rehospitalization) was significantly reduced (hazard ratio [95% CI]) with monotherapy (0.68 [0.64–0.71]), dual therapy (0.56 [0.53–0.59]), and triple therapy (0.45 [0.41–0.50]). Nearly half (46%) of patients who received post‐discharge medication had no dose escalation. Overall, 59% of patients had follow‐up with a primary care physician within 14 days of discharge, and 23% had follow‐up with a cardiologist.

Conclusions

In real‐world clinical practice, increasing treatment intensity reduced risk of death and rehospitalization among patients hospitalized for HF, though the use of guideline‐recommended dual and triple HF therapy remained low. There are opportunities to improve post‐discharge medical management for patients with HF with reduced ejection fraction such as optimizing dose titration and improving post‐discharge follow‐up with providers.
The taxonomy and nomenclature of Kalanchoe humilis, K. prasina, and K. figueiredoi (Crassulaceae subfam. Kalanchooideae)

Authors: SMITH GIDEON F.
Published: August 2020

The taxonomy and nomenclature of Kalanchoe humilis, K. prasina, and K. figueiredoi (Crassulaceae subfam. Kalanchooideae) are discussed. Based on available evidence K. humilis and K. prasina are accepted as two species from eastern and south-tropical Africa, and K. figueiredoi is included in the synonymy of K. prasina.
A new combination and lectotypification in the genus Desmodium (Papilionoideae: Desmodieae) of Mexico

Authors: TORRES-COLÍN LETICIA , DELGADO-SALINAS ALFONSO
Published: August 2020

During the review of the genus Desmodium for the different regional floras of Mexico, we have identified problems of nomenclature and typification such as the case of Meibomia karwinskii, wrongly cited in the list of Legumes of Oaxaca as Desmodium karwinskii and thus invalidly published. Also, in this list the attached illustration exhibits incorrect interpretations on its floral characters that does not agree with usage of this species. In this proposal, the nomenclature of the species name is discussed and justified here the designation of a lectotype and three isolectoypes. In addition, a more detailed description of the species is given based on recent field collections and illustrated with images of the habit and morphological characters.
Synergus Hartig species group (Hymenoptera: Cynipidae: Synergini) with partially smooth mesopleurae from the New World
Authors: LOBATO-VILA IRENE , EQUIHUA-MARTÍNEZ ARMANDO , ESTRADA-VENEGAS EDITH G. , CIBRIÁN-TOVAR DAVID , BARRERA-RUÍZ URIEL M. , PUJADE-VILLAR JULI
Published: August 2020

Inquiline oak gall wasps from the genus Synergus Hartig (Hymenoptera: Cynipidae: Synergini) that occur in the New World should be classified into the following morphological groups: i) species with the radial cell of fore wings open; ii) species with the radial cell of fore wings closed and mesopleurae completely sculptured, always with transversal striae covering its surface; iii) species with the radial cell of fore wings closed and mesopleurae partially smooth, with the speculum always shiny and not sculptured. The latter group, which appears to be unique to the New World’s fauna, is the focus of this study. An exhaustive taxonomical revision of all the Synergus species within this morphological group is carried out for the first time after the initial treatment by Lobato-Vila & Pujade-Villar (2017). Redescriptions, images and new distribution and biological data are provided. A new species from Mexico, Synergus aurofacies Lobato-Vila & Pujade-Villar, sp. nov., is here formally described and illustrated. Synergus variegatus McCracken & Egbert, 1922 is a junior synonym of S. flavens McCracken & Egbert, 1922 syn. nov.; S. profusus McCracken & Egbert, 1922 is a junior synonym of S. pacificus McCracken & Egbert, 1922 syn. nov.; and S. flavus Kieffer, 1904 and S. varicolor Fullaway, 1911 are junior synonyms of S. pomiformis (Ashmead, 1885) syn. nov. A key to species of this group is provided. The morphological traits of the species with partially smooth mesopleurae are discussed.
Cephalocyclus iohannisgabrielis (Coleoptera: Scarabaeidae: Aphodiinae), a new species from Oaxaca, Mexico
Authors: DELLACASA MARCO , ARRIAGA-JIMÉNEZ ALFONSINA
Published: August 2020

The genus Cephalocyclus Dellacasa, Gordon & Dellacasa, 1998 (Coleoptera: Scarabaeidae: Aphodiinae: Aphodiini) was created for 10 species distributed in southern United States of America and Mesoamerica. Subsequently, 14 species were described or added to this genus (Dellacasa et al. 2000, 2007, 2011, 2013; Deloya & Ibáñez-Bernal 2000; Minor et al. 2015). A.A.-J. collected a large series of specimens from Oaxaca (Mexico) belonging to a new species of Cephalocyclus described here. The specimens of this new species came from “El Cerro del Aguila” in the Mixteca Region, between 2800–3250 m. All specimens were collected with pitfall traps baited with human excrement.
A redefinition of Paragrallomyia Hendel (Diptera: Micropezidae, Taeniapterinae) and a revision of the P. albibasis complex
Authors: FERRO GUSTAVO BORGES , MARSHALL STEPHEN A.
Published: August 2020

A new diagnosis is provided for the genus Paragrallomyia, and the common and widely distributed species Paragrallomyia albibasis (Enderlein) and Paragrallomyia thiemei (Enderlein) are redefined as part of a group of 17 superficially similar Neotropical species. This group, here treated as the ‘P. albibasis complex’, includes P. albibasis, P. inpai (Albuquerque), P. teresacristinae (Albuquerque), P. thiemei, P. vulpes (Cresson) and 12 new species (P. aequorea, P. bifurcata, P. brasiliensis, P. caliensis, P. citrina, P. colombiana, P. diminuta, P. ecuadoriensis, P. nodulosa, P. pseudoalbibasis, P. quadrifurca and P. quaternaria). Paragrallomyia parens (Cresson) is newly recognized as a junior synonym of Paragrallomyia albibasis. Taeniaptera nigriceps Hennig and Taeniaptera vulpes Cresson are transferred to Paragrallomyia and 13 other species previously treated as Paragrallomyia are transferred to Poecilotylus Hennig (Grallomyia aeripennis Enderlein, Taeniaptera aliceae Albuquerque, Grallomyia dilutimacula Enderlein, Calobata latifascia Wulp, Grallomyia lauta Cresson, Grallomyia longifurca Hendel, Calobata nigritarsis Macquart, Calobata rufifacies Macquart, Grallomyia seiuncta Czerny, Tanypoda simillima Hendel, Grallomyia strigata Enderlein, Calobata tibialis Macquart, Calobata vittipennis Coquillett). Grallomyia lineata Enderlein is transferred from Taeniaptera to Poecilotylus. All named species remaining in Paragrallomyia are keyed out at least to the species complex level.
Two new species of Batriscenellus Jeannel from tropical Asia (Coleoptera: Staphylinidae: Pselaphinae)
Authors: YIN ZI-WEI , KLEEBERG ANDREAS
Published: August 2020

The genus Batriscenellus Jeannel is recorded from Southeast Asia for the first time, with two species described as new: B. suthepensis Yin & Kleeberg, sp. nov. from Chiang Mai, Thailand, and B. vietnamicus Yin & Kleeberg, sp. nov. from Vinh Phuc, Vietnam. The male of both new species can be readily separated from those of all congeners by the unique shape of the modification on tergites 1 (IV), as well as the structure of the aedeagus.
Assessment of HF Radar in Mapping Surface Currents under Different Sea States
Authors: Wei Guomei , He Zhigang , Xie Yanshuang , Shang Shaoping , Dai Hao , Wu Jingyu , Liu Ke , Lin Rui , Wan Yan , Lin Hang , Chen Jinrui , Li Yan
Published: August 2020

Two Ocean State Monitoring and Analyzing Radar (OSMAR071) (7.8 MHz) high-frequency (HF) radars and four moored ADCPs were operated concurrently in the southwestern Taiwan Strait during January–March 2013. Qualitative and quantitative comparisons of surface currents were conducted between the HF radars and the ADCPs. Except for a location probably affected by shallow water and sand waves on the Taiwan Banks, the HF-radar-derived radial currents (radials) showed good agreement with the ADCP measured results (correlation coefficient: 0.89–0.98; rms difference: 0.07–0.13 m s−1). To provide further insight into the geophysical processes involved, the performance of the HF-radar-derived radials was further evaluated under different sea states (sea states: 2–6). It was found that both the data returns of the radar-derived radials and the differences between the radar-derived radials and the ADCP-derived radials varied with sea state. The HF radar performed best at sea state 4 in terms of data returns. The spatial coverage increased rapidly as the waves increased from sea state 2 to 4. However, it decreased slowly from sea state 4 to 6. Second, the radial differences were relatively high under lower sea states (2 and 3) at the location where the best agreement was obtained between the radar and ADCP radials, whereas the differences increased as the sea states increased at the other three locations. The differences between the radials measured by the HF radars and the ADCPs could be attributed to wave-induced Stokes drift and spatial sampling differences.
Nonlinear differential and integral sliding mode control for wave compensation system of ship-borne manipulator
Authors: Xu Zhiqiang , Wang Zhiyong , Shen Zhixin , Sun Yougang
Published: August 2020

Ship-borne manipulator system is extremely unstable under the complex marine environment, which seriously threatens the safety of operating equipment and operators. In this paper, the dynamics and robust control of wave compensation system for ship-borne manipulator are studied. First, based on the oil circuit variable amplitude control of ship-borne manipulator, the coupling dynamic model of valve-controlled cylinder parallel accumulator is established. Then, since traditional sliding mode needs high-order derivative of feedback angle, it is difficult to implement traditional sliding mode in real hardware system. To solve these problems, a nonlinear differential and integral sliding mode control strategy is proposed. The integral term is introduced to reduce the influence of unmodeled disturbance and parameter perturbation. The stability analysis proves that the system state can track the desired target signal, and the tracking error e( t) tends to zero. In addition, in order to weaken the phenomenon of system chattering, this paper introduces a nonlinear differential control to increase the damping coefficient of the system. The simulation and experimental results show that the control law has good dynamic performance, high control accuracy, and strong anti-disturbance ability without chattering phenomenon. It is of great significance to improve the efficiency and safety of ship-borne manipulator operation, and this paper also provides useful reference for wave compensation system of other marine equipment.
Reaching in: Meaning-making, receiving context and inequalities in refugees’ support networks
Authors: Bernhard Stefan
Published: August 2020

What types of social contacts and support networks do recent migrants build when arriving in their host countries? The literature on social capital stresses the distinction between bonding ties (to people from the same ethnic group) and bridging ties (to people from other groups) and discusses their respective effects on migrants. However, recent critics of these approaches suggest a closer examination of bonding and bridging ties as well as what meaning they have and how they manage the flow of resources. Following this lead, I suggest a dynamic and contextualised approach to social capital that rests upon a detailed understanding of the meaning-making within supportive ties. Empirically, the article investigates bridging ties that ‘reach in’ from recently arrived refugees to more established residents in Germany. I distinguish reaching-in links from reaching-in ties and argue that both interweave in complex ways with institutions and discourses in the host country. Furthermore, the analysis suggests network-related inequalities within the group of refugees. In particular, refugees’ ego-networks vary considerably with respect to possibilities to produce and convert social capital into other forms of capital, such as cultural capital.