bluuebunny/crossref_metadata_2025 huggingface dataset:
An Immune Evolutionary Algorithm with Punishment Mechanism for Public Procurement Expert Selection
Authors: Shen Lijun , Hu Zhineng
Published: February 2021

In the past decade, fairness in public procurement expert selection has attracted research attention. This paper proposes an immune evolutionary algorithm (IEA) with a punishment mechanism for expert selection, in which an ordered weighted aggregation (OWA) operator is applied to adjust the score weights to reduce expert evaluation committee abuse discretion and Grubbs method is employed to test the outliers. The results from a real-life public procurement case demonstrated that the abnormal experts could be effectively suppressed during the selection process and that the proposed method performed better than either the random selection algorithm or IEA, neither of which considers a punishment mechanism. Therefore, the proposed method, which applied the abnormal data detected in the scoring process to the expert selection process with a punishment mechanism, was proven to be effective in solving public procurement problems that may have doubtful or abnormal experts.
Accurate Calibration of a Self‐Developed Vehicle‐Borne LiDAR Scanning System
Authors: Guo Ming , Yan Bingnan , Zhou Tengfei , Pan Deng , Wang Guoli
Published: February 2021

To obtain high‐precision measurement data using vehicle‐borne light detection and ranging (LiDAR) scanning (VLS) systems, calibration is necessary before a data acquisition mission. Thus, a novel calibration method based on a homemade target ball is proposed to estimate the system mounting parameters, which refer to the rotational and translational offsets between the LiDAR sensor and inertial measurement unit (IMU) orientation and position. Firstly, the spherical point cloud is fitted into a sphere to extract the coordinates of the centre, and each scan line on the sphere is fitted into a section of the sphere to calculate the distance ratio from the centre to the nearest two sections, and the attitude and trajectory parameters of the centre are calculated by linear interpolation. Then, the real coordinates of the centre of the sphere are calculated by measuring the coordinates of the reflector directly above the target ball with the total station. Finally, three rotation parameters and three translation parameters are calculated by two least‐squares adjustments. Comparisons of the point cloud before and after calibration and the calibrated point clouds with the point cloud obtained by the terrestrial laser scanner show that the accuracy significantly improved after calibration. The experiment indicates that the calibration method based on the homemade target ball can effectively improve the accuracy of the point cloud, which can promote VLS development and applications.
Modelling the Thin-Layer Drying Kinetics of Marinated Beef during Infrared-Assisted Hot Air Processing of Biltong
Authors: Muga Francis C. , Marenya Moses O. , Workneh Tilahun S.
Published: February 2021

Biltong is a dried meat product that is widely consumed in South Africa. The marinated meat is traditionally dried under ambient winter conditions while commercial biltong producers use hot air driers. Hot air drying is time-consuming and energy-intensive. A combined infrared and hot air drying (IRHAD) is an alternative method of drying meat during biltong processing. The aim of this study was to establish the effect of the infrared (IR) power, the temperature, and velocity of the drying air on the drying kinetics of marinated beef and subsequently select the best thin-layer drying model for IRHAD during biltong processing. Marinated beef samples were dried at IR power levels of 500, 750, and 1000 W; drying air temperatures of 30, 35, and 40°C; and air velocity of 1.5 and 2.5 m∙s-1. Results indicate that increasing the IR power and the drying air temperature increased the IR emitter temperature and the core temperature of the marinated beef sample. Consequently, increasing the drying rate thus reduced drying time. The air velocity had an inverse relationship with the IR emitter temperature, the core temperature of the marinated beef sample, and the drying rate. The drying process was characterised by a rising rate period in the first half an hour, followed by a falling rate period which implies that moisture transport occurred partly by surface evaporation and predominantly by diffusion. The effective moisture diffusivity ranged from

4.560
×

10

−
10

to

13.7
×

10

−
10

 

m

2

∙

s

−
1

, while, the activation energy ranged between 40.97 and 59.16 kJ∙mol-1. The IRHAD of marinated beef during its processing to biltong was best described by the two-term model since it had the highest

R

2

(0.9982-0.9993) and the lowest RMSE (0.0062-0.0099). The power level of the IR emitter of 1000 W combined with a drying air temperature and velocity of 40°C and 1.5 m∙s-1, respectively, showed the highest improvement in the drying kinetics and the lowest drying time of

5.61
±
0.35

hours; hence, it is recommended as a possible drying alternative for the processing of biltong.
Ectoine in the Treatment of Irritations and Inflammations of the Eye Surface
Authors: Bilstein Andreas , Heinrich Anja , Rybachuk Anna , Mösges Ralph
Published: February 2021

The ocular surface is facing various unspecific stress factors resulting in irritation and inflammation of the epithelia, causing discomfort to the patients. Ectoine is a bacteria‐derived extremolyte with the ability to protect proteins and biological membranes from damage caused by extreme environmental conditions like heat, UV‐light, high osmolarity, or dryness. Evidence from preclinical and clinical studies attest its effectiveness in treating several epithelium‐associated inflammatory diseases, including the eye surface. In this review, we analysed 16 recent clinical trials investigating ectoine eye drops in patients with allergic conjunctivitis or with other unspecific ocular inflammations caused by e.g. ophthalmic surgery. Findings from these studies were reviewed in context with other published work on ectoine. In summary, patients with irritations and unspecific inflammations of the ocular surface have been treated successfully with ectoine‐containing eye drops. In these patients, significant improvement was observed in ocular symptoms of allergic rhinoconjunctivitis, postoperative secondary dry eye syndrome, or ocular reepithelisation after surgery. Using ectoine as an add‐on therapy to antihistamines, in allergy patients accelerated symptom relief by days, and its use as an add‐on to antibiotics resulted in faster wound closure. Ectoine is a natural substance with an excellent tolerability and safety profile thus representing a helpful alternative for patients with inflammatory irritation of the ocular surface, who wish to avoid local reactions and side effects associated with pharmacological therapies or wish to increase the efficacy of standard treatment regimen.
Unexplained Variation in Benefit of Treatment of Congenital Unilateral Aural Atresia: A Review of the Literature
Authors: Vogt Katharina , Desmet Jolien , Janssen Arno M. , Agterberg Martijn J.H. , Snik Ad F.M.
Published: February 2021

Objective: A review of published data regarding binaural hearing after treatment of congenital unilateral conductive hearing loss (UCHL) due to aural atresia. Treatment options concern atresia surgery (reconstructive surgery), application of a bone conduction device (BCD), or application of a middle ear implant (MEI). Data Sources: Database PubMed was searched for articles published in English and German between January 1, 1994, and January 1, 2019. Study Selection: The initial search identified 52 studies, of which 9 met the inclusion criteria. Data Synthesis: Comparison of studies was based on a structured review. Meta-analysis was not feasible because of the heterogeneity of outcome measures, the limited number of relevant papers (9), and diverse types of treatment (5). Conclusions: Treatment of UCHL results in bilateral hearing instead of binaural hearing. The large intersubject variability in benefit of treatment is unexplained with a clear improvement in the minority of listeners and a limited improvement or binaural interference in most listeners after atresia repair or amplification with a BCD or MEI.
Birthweight Differences in Adolescent Monozygotic Twins Influence Androgens, Psychological Morbidity, and Health-Related Quality of Life
Authors: Schmitz Lioba , Schulte Sandra , Stoffel-Wagner Birgit , Bartmann Peter , Plamper Michaela , Schreiner Felix , Woelfle Joachim , Gohlke Bettina
Published: February 2021

Background: Adverse prenatal conditions can exert a long-lasting impact in later life. Patients and Methods: Thirty-eight post-pubertal monozygotic twin pairs (16 female pairs) with divergent birthweight (bw) due to twin-to-twin transfusion syndrome were examined at a median of 15.1 years. Auxological and endocrine parameters were measured. To evaluate effects of intra-twin bw and hormone differences on mental health, adolescents and their parents completed the Strengths and Difficulties Questionnaire (SDQ), identifying psychological problems. Twins answered the questionnaire on health-related quality of life (HrQoL, KIDSCREEN-52). Results: Parents attributed a higher number of psychological challenges to the formerly smaller twins, for example, total difficulties (8.8 vs. 6.5, p = 0.009). Differences in bw were associated with differences in parental evaluation of problems, for example, peer relationship problems (r = −0.57 and p = 0.0001). In contrast, bw differences did not affect subjects’ self-assessment of psychological factors but on physical well-being (r = 0.42, p = 0.017). The formerly smaller discordant twins showed significantly lower HrQoL regarding psychological well-being (24.9 vs. 26.6, T1,15 = −2.2, and p = 0.043) and moods and emotions (29.8 vs. 32.0, T1,15 = −2.3, p = 0.039). Higher concentrations of androstenedione were linked to greater psychological well-being (r = 0.39 and p = 0.036) in all twin pairs. Conclusion: Our results show that the prenatal environment leading to bw differences exerts a long-lasting impact on diverging parental evaluation of mental health. Formerly smaller discordant twins showed significantly lower HrQoL regarding psychological well-being and moods and emotions. Higher androstenedione concentrations were linked to greater psychological well-being.
Environmental Tobacco Smoke Exposure and Brain Functioning Associated with Smoking Cue-Reactivity and Inhibitory Control in Nonsmoking Adolescents
Authors: Boormans Anna Johanna Maria Gemma , Dieleman Joyce , Kleinjan Marloes , Otten Roy , Luijten Maartje
Published: February 2021

Introduction: Despite its well-established negative effects, environmental tobacco smoke (ETS) exposure remains highly prevalent worldwide. ETS exposure is associated with a wide range of physical and mental health-related problems among youth, including an increased likelihood to develop nicotine dependence. Up till now, neurocognitive effects of ETS exposure are largely unknown, while such effects could explain the role of ETS exposure in the development of nicotine dependence. Therefore, this preregistered study investigated the role of current ETS exposure in brain functioning associated with smoking cue-reactivity and inhibitory control. Method: Concurrent with functional magnetic resonance imaging, nonsmoking adolescents aged 14–18 years (N = 51) performed a smoking cue-reactivity task, assessing brain functioning to smoking cues, and a Go/NoGo task measuring inhibitory control. ETS exposure was measured using a self-report questionnaire and biochemically verified. Results: No significant associations were observed between current ETS exposure and brain functioning associated with smoking cue-reactivity and inhibitory control. Conclusion: These findings suggest that low-to-moderate levels of current ETS exposure are not associated with increased salience of smoking cues or deficits in inhibitory control in nonsmoking adolescents. Longitudinal research is needed to further clarify the exact effect of lifetime ETS exposure on brain functioning, as well as research focusing on the effects of higher levels of ETS exposure.
Clinical Importance of a Peritoneal Interposition Flap to Prevent Symptomatic Lymphoceles after Robot-Assisted Radical Prostatectomy and Pelvic Lymph Node Dissection: A Systematic Review and Meta-Analysis
Authors: Deutsch Sebastian , Hadaschik Boris , Lebentrau Steffen , Ubrig Burkhard , Burger Max , May Matthias
Published: February 2021

Background: Robot-assisted radical prostatectomy (RARP) including pelvic lymph node dissection (PLND) is the current state of the art in surgical therapy of localized prostate cancer with intermediate or high risk. PLND in particular is associated with morbidity inherent to this method; the rate of symptomatic lymphoceles (sLCs), for example, ranges up to 10%. Objective: Various intraoperative modifications have been developed with the aim of reducing the sLC rate. Based on current studies, a peritoneal interposition flap (PIF) appears to be one of the most effective methods for this purpose. Under the criteria of a systematic review, 5 retrospective studies have been identified until now, 4 of which showed a positive effect of PIF on the sLC rate. Results and Limitations: A total of 1,308 patients were included in the aggregated analysis of these 5 studies. The amount of sLCs was 1.3% (8/604) and 5.7% (40/704) in the PIF and standard groups, respectively (p < 0.001). The resulting odds ratio (OR) was 0.23 (95% confidence interval [CI]: 0.05–0.99), taking in­to account a noteworthy heterogeneity of the 5 studies (Q = 9.47, p = 0.05; I2 = 58%). In addition, a prospective randomized and blinded study (Pianoforte trial) with corresponding sLC rates of 8.3% (9/108) versus 9.7% (12/124) (p = 0.820) exists. In this study, the OR was 0.85 (95% CI: 0.34–2.10, p = 0.722). Conclusion: Despite positive results from retrospective studies with indirect evidence, the role of the PIF in the reduction of sLC in RARP could not be conclusively assessed yet. The results of the first prospective randomized study do not show a positive effect of PIF, declaring a research gap for further studies with direct evidence.
Subclinical Onychomycosis in Apparently Healthy Adults
Authors: Angulo-Rodríguez Alejandra , Hernández-Ramírez Heidi , Vega-Memije María Elisa , Toussaint-Caire Sonia , Moreno-Coutiño Gabriela
Published: February 2021

Introduction: Onychomycosis is a frequent chronic nail infection, with a worldwide prevalence of 5.5% making it the most common nail disease, and its incidence increases with age. Clinically, it causes discoloration and thickening of the nail plate and may be accompanied by onycholysis. However, little is known of the subclinical infection. Methods: We studied adult male and female outpatients auto-referred as healthy and that had healthy appearing toenails. Nail distal clippings were obtained from the right first toenail. This sample was stained with PAS and observed by an expert dermatopathologist searching for fungal structures. Results: A total of 32 samples were included: 8 from men (25%) and 24 from women (75%), with ages ranging from 27 to 66 years (mean age of 43 years). Twenty-four patients did not present any histopathological finding suggestive of infection (75%), while 7 patients had a single finding (spores or hyphae) (21.8%), and 1 patient had both findings (3.12%). Discussion/Conclusion: We found 4 patients with yeasts, 3 with hyphae, and 1 patient with a combined infection with both yeasts and hyphae (3.1%). These add up to 25% of the clinically apparent healthy nails. Our results show that we still have much to learn from the initial stages of onychomycosis and that our population probably has higher incidence of this nail disease, so we must be alert to subtle nail changes. As our participants signed an informed consent, we will contact those that resulted positive for follow up consultations.
Obstacle Avoidace Robot Using LabView
Authors: Sheikh Tasher Ali , Dutta Swacheta , Baruah Smriti , Sharma Pooja , Roy Sahadev
Published: February 2021

The concept of path planning and collision avoidance are two of the most common theories applied for designing and developing in advanced autonomous robotics applications. NI LabView makes it possible to implement real-time processor for obstacle avoidance. The obstacle avoidance strategy ensures that the robot whenever senses the obstacle stops without being collided and moves freely when path is free, but sometimes there exists a probability that once the path is found free and the robot starts moving, then within a fraction of milliseconds, the robot again sense the obstacle and it stops. This continuous swing of stop and run within a very small period of time may cause heavy burden on the system leading to malfunctioning of the components of the system. This paper deals with overcoming this drawback in a way that even after the robot calculates the path is free then also it will wait for a specific amount of time before running it. So as to confirm that if again the sensor detects the obstacle within that specified period then robot don’t need to transit its state suddenly thus avoiding continuous transition of run and stop. Thus it reduces the heavy burden on the system.
Kinematic Modelling of Multi-Terrain Pine Needle Collecting Robot (PiNCoR) for the Hilly areas of Uttarakhand
Authors: Dubey Shival , Prateek Manish , Saxena Mukesh
Published: February 2021

Uttarakhand – a northern state of India in the foothills of Himalayas has approximately 64.8% of forest. Pine (Pinus roxburghii) is an important tree species which is because of its numerous uses becomes more prominent in this hilly state. Pine Needle Collecting Robot (PiNCoR) is a machine designed to collect pine needles from the high altitude pine forest regions. The robot is capable to maneuver over rough terrains, can navigate through craters and can stock the collected pine needles. After analyzing the design constraints for navigation on the hilly terrains, a small rover was designed and the kinematics portion is discussed in this paper. With the use of a versatile rocker bogie suspension mechanism, this paper also presents the kinematic modelling of a wheeled mobile robot being the best for hilly areas with super stability and traction control being its assets. It analyzes the different inputs from the information provided by the on-board sensor system for maneuvering. The robot has five degrees of freedom (DoF) providing it the flexibility to work in x and z axes as along with the standard pitch, roll and yaw directions.
Adaptive Sliding Mode Controller Design For Attitude Small UAV
Authors: Amini Samaneh
Published: February 2021

The dynamic of Unmanned Aerial Vehicle (UAV) is nonlinear, strongly coupled, multi-input multi-output (MIMO), and subject to uncertainties and external disturbances.  In this paper, an adaptive sliding mode controller (ASMC) is integrated to design the attitude control system for an inner loop fixed wing UAV. In the proposed scheme, sliding mode control law parameters due to uncertainty are assumed to be unknown and are estimated via adaptation laws. The synthesis of the adaptation laws is based on the positivity and Lyapunov design principle. Navigation outer loop parameters are regulated via PID controllers. Simulation results indicate that the proposed controller design can stabilize the nonlinear system, and it is robust to parametric model uncertainties and external disturbance.
Design and Development of Leg-Wheel Hybrid Hexapod along with Machine Learning Algorithm implementation
Authors: Madhusudanan Harikrishnan
Published: February 2021

The conventional mobile robotic platforms which either uses wheels or legs are quite familiar and each one of them has its own advantages and disadvantages. The wheeled robot is suitable for only plain and smooth terrain, whereas the legged robot can travel in any kind of terrain but is comparatively slower than the wheeled robot. So, a hybrid of both wheeled and legged platform would be quite suitable for any kind of terrain. The primary focus of this paper is to design and develop a leg-wheel hybrid robotic platform with a concurrent engineering and mechatronics approach to produce results with optimised design metrics at each and every stage of its development. An overall view of the entire mechatronics system is considered for design and development of the robot at each and every stage rather than a sequential engineering approach.
Two-Degree-of-Freedom PID Controller, Its Equivalent Forms and Special cases
Authors: A. Suthar Haresh
Published: February 2021

The design of control systems is a multi-objective problem so, a two-degree-of-freedom (abbreviated as 2DOF) control system naturally has advantages over a one degree- of-freedom (abbreviated as 1DOF) control system. The main objective of 2DOF control is to control both set point tracking and disturbance rejections.Various 2DOF PID controllers and its equivalent transformations were proposed for industrial use by different researchers. Most of the above researches were published in Japanese language and have not been translated into English language yet. An objective here is to provide detail analysis regarding structure of 2DOF controller, its equivalent forms and its special cases. A system transfer function having transport delay and load disturbance is considered as a test bench to verify various 2DOF control strategies. MATLAB is used as software tool to verify the various 2DOF control strategies. The analysis will be helpful to the engineers and researchers to understand the topic in detail for further exploration.
Nonlinear dynamic modeling and optimal motion analysis of two-link manipulators
Authors: Taheri Moein
Published: February 2021

Manipulators are used in various industrial applications to perform variant operations such as conveying payloads. Regarding to their applications, dynamic modeling and motion analysis of manipulators are known as important and appealing tasks. In this work, nonlinear dynamics and optimal motion analysis of two-link manipulators are investigated. To dynamic modeling of the system, the Lagrange principle is employed and nonlinear dynamic equations of the manipulator are presented in state-space form. Then, optimal motion analysis of the nonlinear system is developed based on optimal control theory. By means of optimal control theory, indirect solution of problem results in a two-point boundary value problem which can be solved numerically. Finally, in order to demonstrate the power and efficiency of method, a number of simulations are performed for a two-link manipulator which show applicability of proposed method.
Embedded Fuzzy Based Boiler Control
Authors: S Celin
Published: February 2021

Boiler control in a power station is a very important criteria in regulation of uninterrupted electricity. In existing power plants, the control of its features and parameters are done by PI and PD controllers. The parameters that control the regulation of boiler conduction are drum level, steam flow, feed water flow, steam temperature and light intensity. It is necessary to produce the steam required to run the generator. When the load in the generator changes, there must be corresponding change in the steam volume. This may cause adverse effect in the boiler. In order to avoid the effect in the boiler, the parameters mentioned above must be maintained constant, which is attained by regulating the corresponding valves. This project work has a feasibility of using fuzzy logic controllers in the place of conventional controllers is done by using embedded system. It is found that the rule based fuzzy logic technique can be implemented by stringent operating conditions. 
Modeling and Simulation of Hexapod Kinematics with Central Pattern Generator
Authors: M.T. Aju
Published: February 2021

The revealed secrets of nature always led humans to their aspiring achievements. The fastest animal on land is Cheetah and similar robot has developed by engineers so far to attain a record speed of 20mph among legged robots. But in nature there are some insects those are far ahead of cheetah in speed with a unit of body length per second. Insects are small in their body size with legs usually countable from 4 to 12 or more. With more legs they can have more stability and can adapt to different terrain faster while walking. Six legged robot (hexapod) is generally expect to attain higher speed in terms of body length per second, since the nature has proof for it. Bio-inspired Central Pattern Generator (CPG) is in use for so far in robotic world to mimic the locomotion patterns of insects and other animals. Currently the hybrid controller of CPG and reflex is going on and this paper suggests a new architecture for the system. Neural Network modeled CPG acts as the motor neuron for each joint of the leg. In each instant a neural network models the gait of the robot by learning procedure from the reflex system. This is like the Central Nervous System (CNS) selecting gait of an animal according to the terrain that travels. CNS takes sensory feedback from eyes, force on each leg and body balance from cochlea to adapt the gait for current terrain. This paper in first place tries to simulate the gait patterns for a hexapod.
Accelerometer Based Control of Robotic Arm
Authors: Sawant Yogita
Published: February 2021

Abstract— Robots are very smart and interactive machines that can be programmed and used in many areas such as industry, manufacturing, production lines, household or health, etc. These robots can perform hard, dangerous, and accurate work to facilitate our life and to increase the production. Humans are trying to minimize the time required to do the similar kind of jobs. The task in which picking & placing of an object is to be done, can be carried out with the help of robots. These robots can minimize the human efforts. The robotic arms can be also used in the industries to assemble the small parts, in chemical industries to pick and place small types of object such as tablets. Artificial robotic arms thus can be used to control gestures. In this paper an  idea of controlling robotic arm is implemented using an accelerometer which is placed on the human hand, capturing its behavior (gestures and postures) which are then transmitted at some distance and the robotic arm assembly connected wirelessly moves accordingly.
Local Path Planning of Mobile Robot Using Critical-PointBug Algorithm Avoiding Static Obstacles
Authors: DAS SUBIR KUMAR
Published: February 2021

Path planning is an essential task for the navigation of Autonomous Mobile Robot. This is one of the basic problems in robotics. Path planning algorithms are classified as global or local, depending on the knowledge of surrounding environment. In local path planning, the environment is unknown to the robot, and sensors are used to detect the obstacles and to avoid collision. Bug algorithms are one of the frequently used path planning algorithms where a mobile robot moves to the target by detecting the nearest obstacle and avoiding it with limited information about the environment. This proposed Critical-PointBug algorithm, is a new Bug algorithm for path planning of mobile robots. This algorithm tries to minimize traversal of obstacle border by searching few important points on the boundary of obstacle area as a rotation point to goal and end with a complete path from source to goal.
Design and Fabrication of Voice Controlled Unmanned Aerial Vehicle
Authors: Anand S. Sakthi , Mathiyazaghan R.
Published: February 2021

Unmanned Aerial Vehicles have gained well known attention in recent years for a numerous applications such as military, civilian surveillance operations as well as search and rescue missions. The UAVs are not controlled by professional pilots and users have less aviation experience. Therefore it seems to be purposeful to simplify the process of aircraft controlling. The objective is to design, fabricate and implement an unmanned aerial vehicle which is controlled by means of voice recognition. In the proposed system, voice commands are given to the quadcopter to control it autonomously. This system is navigated by the voice input. The control system responds to the voice input by voice recognition process and corresponding algorithms make the motors to run at specified speeds which controls the direction of the quadcopter.
Structural Analysis and Five-Layered Control Frame Work for Underground Pipe Inspection Robot
Authors: Kumar Gopal Satheesh , M Ajin
Published: February 2021

Design of a robot generally involves various types of analyses that invariably include structural, numerical, kinematic, dynamic and experimental analysis. A robot designed as a solution for social problems would have to undergo all these stages before it is incorporated in-situ. The authors in continuation to their earlier work [1] are presenting the results of structural analysis in this paper. Initially a detailed description of the anatomy of the proposed robot is provided for clarity along with the identified design parameters. The primary design parameter ‘load to power ratio’ establishes certain geometric and structural constrains on the design of links comprising the robot. This relationship is studied in order to improve to the load to power ratio of the robot. A significant reduction in weight is achieved by working on these variables which leads to the improvement in the functional aspects too, viz., reduced torque requirement from the motor. Upon finalizing on the choice of motors and sensors the 5 layered control architecture based on statespace representation is also presented. Fuzzy logic based control algorithm is proposed to unite the layered approach depending on the task allocated to the robot.
Wireless Gesture Controlled Semi-Humanoid Robot
Authors: Fegade Toshika , Kurle Yogesh , Nikale Sagar , Kalpund Praful
Published: February 2021

Robotics is a field concerned with the “intelligent connection of perception of action”. The most common manufacturing robot is the robotic arm with different degree of freedoms. Today, these humanoids perform many functions to assist humans in different undertakings such as space missions, driving and monitoring high speed vehicles. They are called semi-humanoids because they resemble to upper part of human body.

        The idea of this paper is to change perception of controlling robotic arm. This paper provides a way to get rid of old fashioned remote controls and gives an intuitive technique for implementation of Semi-Humanoid Gesture controlled robot. It includes two robot arms which are exactly similar to human arm (5 fingers) increasing sensitivity of the system. It includes motion sensors -flex and accelerometer (used in mobile phones for tilting motion). The system design is divided into 3 parts namely: Robotic Arm, Real time video and Platform.
        The prime aim of the design is that the robot arm and platform starts the movement as soon as the operator makes hand and leg gesture. The Robotic arm is synchronized with the gestures (hand postures) of the operator and the platform part is controlled by the leg gestures of the operator.  The robot and the Gesture device are connected wireless via RF. The wireless communication enables user to interact with the robot in an effortless way.
Current sensorless vector controlled induction motor drive
Authors: Verma Vimlesh
Published: February 2021

This paper presents a current sensorless vector controlled induction motor drive with only speed sensor present in the system. The same performance as that of normal vector control drives (which uses two current and one speed sensor) is achieved with the proposed current sensorless drive. Such an approach is suitable for applications, where speed sensor cannot be eliminated. Thus, elimination of current sensor results in reduction of cost, increases reliability, reduced size and noise immunity. A new current estimation algorithm is proposed in this paper. The current estimation algorithm, estimates the current in two phase stationary reference frame. The proposed current estimation technique can also be used as a fault tolerant algorithm for normal vector controlled drives in case of current sensor failures. The performance of the current sensorless drive using the proposed current estimation technique is verified through MATLAB/SIMULINK. Extensive simulation results are presented to confirm the effectiveness of the algorithm. The algorithm is also experimentally validated with the laboratory developed prototype and the results are presented. The prototype is built around a dSPACE 1104 controller board.
Optimal TCSC placement for congestion management in deregulated power systems using antlion optimization algorithm
Authors: Moazzami Majid , Shahinzadeh Hossein , Gharehpetian Gevork B. , Shafiei Abolfazl
Published: February 2021

Congestion management is one of the important issues in the deregulated power systems. There are several methods to eliminate congestion. Utilizing FACTS devices is an appropriate option for large-scale and quick control of flows of transmission lines. FACTS devices such as Thyristor Controlled Series Capacitor (TCSC) can help to mitigate the transmitting flow of power in the congested lines, which leads to an increase in the network loading ability as well as reduction of both losses and production costs. Due to the considerably high price of FACTS devices, it is important to determine their optimum location on the network. Accordingly, in this paper, the Antlion optimization algorithm (ALO) has been employed to conduct a congestion management analysis to determine the optimal location for the installation of TCSC, which is simulated on an IEEE 14-bus test system subject to satisfy the constraints of the market environment.
Path optimization for robots in a constrained workspace
Authors: Badr Doaa Mahmood , Mahdi Abbas Fadhal
Published: February 2021

In this work, the classical A* algorithm serves as path planner to generate the optimum path that would avoid collisions and take the start, collisions, and goal as an input and give the optimal path as an output. The work was done in a static environment, so the coordinates of the obstacles are predefined for the planner. The obtained path is just a sequence of points in space, and this path may be considered later the task space and the first step for another sequential operation like mapping from Cartesian space to joint space, topology optimization, dimensional synthesis, etc. The case study was Lab-Volt 5150 manipulator; it is an accurate educational five degree of freedom 5DOF stationary robot driven by five stepper motors.
Interval type-2 fuzzy logic controller design for distillation column process
Authors: Hassan Mohammed Y. , Ezzaten Sebal S.
Published: February 2021

Distillation columns are the most units used in oil reﬁneries, and chemical factories. This is a very difficult process and non-linear. Therefore,
 the development of intelligent control systems for the columns of
 the distillation is very difficult. In this paper, an intelligent control strategy using Mamdani type Interval Type-2 PI Like Fuzzy Logic Controller (IT2FLC) is used. The controller consists of PD-Like FLC with integrated output. Kernek Mendel (KM) algorithm is used as the type reduction method for the IT2FLC. This controller is applied to control a continuous binary trays distillation column. The controller has three tunable gains to reach minimum overshoot, minimum error and minimum settling time at least variables can be controlled. The controller is a variable of the molar fraction of distillate and the reflex ratio is the manipulated variable. Integral Time Absolute Error (ITAE) is employed as an objective function to measure the improvement in time response where the error is between desired and output product composition. The performance of IT2FLC is compared with Type-1 PI Like FLC (T1FLC). The results of the simulations have shown that the project of IT2FLC works efficiently to no- disturbance and the effects of disturbance. Improve average is of 85% for a constant set-point without a disturbance and 80% with a disturbance. Furthermore, the average improvement for a step set-point is 53% without disturbance and 74% with disturbance. All results of the simulation confirmed the hardiness and control any consistent inaccurate with obvious advantages for the IT2FLC.
Concurrent asynchronous robotic subsumption using actors & promises
Authors: Srivastav Ratnesh , Nandi G. C. , Shukla Rohit , Verma Harsh
Published: February 2021

Fascinated with robotics open source integrated component MARIE [1], ROS [5] and open source component PLAYER/STAGE [2], CARMEN [3] available in the eld of robotics application. We aim at developing an asynchronous concurrent robotics application based on subsumption [6] architecture using PLAYER, STAGE and already available services freely available on the internet. We used wanderer and wall follower services embedded inside an actor [10][11] and integrated these services to two dierent robots of same congurations on our promise based frame-work that provides actor as service. The two robots switch their services based on color detected (red,green,blue) during their movement in an environment asynchronously. Using actor as a service lls the gap of SOA [4] & EDA [7] by providing
synchronous and asynchronous support for communication. We measured the performance of time taken in completion of services in promise [8] based implementation ,synchronous and asynchronous callback [9] based implementation. We developed a model to prove deadlock freeness in our integrated architecture using petrinet [15] interface composition. We have also been able to justify that component integrated on promise based framework takes less time in service completion than synchronous and asynchronous callback based services.
O arquivamento da memória televisiva em plataformas de aplicativos digitais
Authors: Cajazeira Paulo Eduardo , Souza José Jullian Gomes de
Published: February 2021

O artigo propõe-se a fazer apontamentos iniciais acerca dos estudos sobre televisão por meio de uma conjectura pouco evidenciada no campo científico: o processo de arquivamento, salvaguarda e memória audiovisual televisiva sob as potencialidades das plataformas de aplicativos digitais. Apresenta-se como objetivo geral refletir sobre novas formas de arquivamento da memória audiovisual a partir da descrição da plataforma Globoplay. O estudo ocorre mediante uma investigação e reflexão inicial sobre o uso dessa plataforma digital como recurso e possibilidade de armazenamento, recuperação e disponibilização da produção audiovisual em âmbito televisivo, em diálogo com o cenário atual da ecologia midiática. Assim, o aplicativo Globoplay é identificado como lugar de memória digital, instantânea e móvel fortalecendo o vínculo entre o produto audiovisual, a televisão e o usuário/telespectador. A metodologia é de natureza qualitativa e perpassa um estudo descritivo sobre as possibilidades da plataforma para o arquivamento audiovisual em ambientes multiplataformas. Apontam-se como resultados as múltiplas interações entre as plataformas audiovisuais do Grupo Globo, o resgate de produtos audiovisuais armazenados em seu centro de arquivo e as novas formas de arquivamento sob o uso das potencialidades dos aplicativos digitais na internet.
A violência da vigilância: discursos sobre tecnologia na série You
Authors: Anjos Júlia Cavalcanti Versiani dos
Published: February 2021

O presente artigo analisa os sentidos expressos na produção televisiva You acerca de temas como interações digitais, vigilância e privacidade. A ficção seriada em questão contribui para que se possa ir além da visão simplista de oposição entre mundo real e virtual e, assim, discutir os problemas efetivamente existentes em torno do uso das tecnologias em nossa sociedade: a invasão de privacidade e a vigilância constante a que não apenas a protagonista feminina da série está submetida, mas também, guardadas as devidas proporções, todos os bilhões de usuários dos sites de redes sociais, que se divertem e se expressam por meio dessas ferramentas enquanto seus dados são explorados.
Complexidade narrativa na série Homens? estudo baseado em técnicas de decupagem e categorização
Authors: Lemos Ligia Prezia
Published: February 2021

Este artigo realiza uma exploração metodológica de técnicas de análise de ficção televisiva com características complexas. Investiga elementos de complexidade narrativa (MITTELL, 2012) na série Homens? (Comedy Central, 2019) a partir de dois eixos: seu nível discursivo, que remete ao conceito de merchandising social como recurso comunicativo (LOPES, 2009); e seu nível narrativo, por apresentar um conjunto heterogêneo de artifícios para leitura e compreensão do discurso proposto, alicerçado em técnicas de storytelling. Construímos tal classificação a partir de decupagem das cenas, acompanhando a própria estrutura narrativa desses eixos que se entrecruzam dialogicamente para amplificar a discussão sobre as temáticas propostas.
Fluxos, mediações e narrativas: o processo de comunicação dos gêneros audiovisuais de ficção em webséries brasileiras da Netflix
Authors: Gonçalves Carlos Pereira
Published: February 2021

A proposta do artigo é analisar o consumo cultural de séries exibidas pela Netflix em relação ao processo de comunicação dos gêneros audiovisuais, observando a tecnicidade da plataforma streaming, modelo próprio de classificação “gêneros” e seu fluxo interativo no portal e, por outro lado, uma leitura das características narrativas de produção específica. Tratam-se das webséries brasileiras de ficção, originais e distribuídas globalmente pela empresa. A temática insere-se no atual contexto midiático e mercadológico de alta convergência e migração da produção seriada – da televisão ao meio digital –, sem desconsiderar o campo cinema na formação compartilhada de narrativas tradicionais e contemporâneas do formato multimídia série.
A opinião pública na produção literária e acadêmica de relações públicas no Brasil: 1960-2019
Authors: Becker Gustavo Eugênio Hasse
Published: February 2021

Este artigo relata uma investigação que mapeou a produção literária e acadêmica de relações públicas no Brasil, buscando compreender as abordagens sobre o tema opinião pública no referido corpus. Uma consulta a bibliotecas universitárias, à Fundação Biblioteca Nacional e a programas de pós-graduação stricto sensu ocorreu para a coleta de dados, resultando na identificação de 20 livros e seis teses que discorreram sobre opinião pública, e de onde emergiram sete categorias com abordagens distintas sobre o tema.
A comunicação das organizações diante de públicos, esfera pública e opinião pública: como as plataformas sociais digitais se encaixam nisso?
Authors: Saad Elizabeth
Published: February 2021

Examinamos, por meio de abordagem conceitual, a caracterização do discurso e das ações de comunicação das organizações diante de uma esfera pública híbrida na qual a opinião pública adquire um status paradoxal de autonomia de expressão estando, simultaneamente, sob o determinismo algorítmico das ambiências para expressão de opinião. Iniciamos a discussão pelo entendimento da esfera pública híbrida constituída por uma miríade de ambiências que abrigam redes de sociabilidade; consideramos os fatores intervenientes que impactam a comunicação das organizações – os discursos mediados por modulações algorítmicas e também por influenciadores; e concluímos com reflexões sobre os relacionamentos com públicos, audiências e a formação de opinião que, a despeito de propósitos claros da organização, são impactados por processos de desinformação. Como suporte conceitual, além de material produzido pela autora, tomamos as referências clássicas de Papacharissi (2002), Boyd e Baym (2012), Livingstone (2015), Caplan e Boyd (2016).
Esferas públicas em movimento
Authors: Farias Luiz Alberto de , Reis Daniel , Lopes Valéria de Siqueira Castro , Bezerra Camila Paschoal , Cordeiro Gabriel
Published: February 2021

EntrevistaPablo Ortellado
The Legal Framework of Cybercrime in Palestine
Authors: Elshobake Mohammed R. M. , Laeba Muhammad
Published: February 2021

The rate of committing cybercrimes in Palestine has increased in recent years due to the increased use of the Internet and social media, in addition to the absence of deterrent legislation to combat these crimes. Palestine suffers from legal problems in the field of criminal legislation due to the duplication of penal laws applied in the West Bank and Gaza Strip. This article will discuss the legal framework of cybercrimes in Palestine. The researcher will mainly use historical, analytical, and library research methods for this purpose. The results indicate that the legal framework regulating cybercrimes in Palestine is not unified, and the difference in legislation regulating cybercrimes in Palestine has led to different penalties for cybercrimes, which violates the principle of equality stipulated in the Palestinian Basic Law (Palestinian Interim Constitution). The benefit of this article is to propose some recommendations to develop Palestinian laws in order to combat cybercrimes.
Spegazzinia camelliae sp. nov. (Didymosphaeriaceae, Pleosprales), a new endophytic fungus from northern Thailand

Authors: SUWANNARACH NAKARIN , KUMLA JATURONG , LUMYONG SAISAMORN
Published: February 2021

A new endophytic ascomycete, described herein as Spegazzinia camelliae, was isolated from leaves of Camellia sinensis var. assamica collected from Nan Province, Thailand. This species is characterized by basauxic conidiophores and dark brown to blackish brown α and β conidia. It can be distinguished from previously described Spegazzinia species by the spine length of the α conidia and the size of the β conidia. Multi-gene phylogenetic analyses of the small subunit (SSU), large subunit (LSU) and internal transcribed spacers (ITS) of the nuclear ribosomal DNA (rDNA) and the translation elongation factor 1-alpha (tef1) genes also support S. camelliae is a distinct new species within Spegazzinia. A full description, color photographs, illustrations and a phylogenetic tree showing the position of S. camelliae are provided.
The holomorph of Arthrinium setariae sp. nov. (Apiosporaceae, Xylariales) from China
Authors: JIANG NING , TIAN CHENG-MING
Published: February 2021

Arthrinium is a widely distributed genus occurring on various hosts and substrates. Members of Arthrinium were distinguished based on the phylogeny of combined internal transcribed spacers (ITS), translation elongation factor 1-alpha gene (tef1), and beta-tubulin gene (tub2). In the present study, a specimen of obvious stromata on Setaria viridis was collected in Beijing Forestry University. Identification based on characters of sexual morph on Setaria viridis culms, asexual morph from manual media, and phylogeny indicated that it is different from any known species. Hence, we proposed a new species for this taxon named Arthrinium setariae. Arthrinium setariae has much larger conidia than its phylogenetically close species, A. jiangxiense, and represented the first record of Arthrinium inhabiting the host genus, Setaria.