Search results

The purpose of this paper is to obtain an optimal mobile robot path planning by the hybrid algorithm, which is developed by two nature inspired meta-heuristic algorithms, namely, cuckoo-search and bat algorithm (BA) in an unknown or partially known environment. The cuckoo-search algorithm is based on the parasitic behavior of the cuckoo, and the BA is based on the echolocation behavior of the bats.

The developed algorithm starts by sensing the obstacles in the environment using ultrasonic sensor. If there are any obstacles in the path, the authors apply the developed algorithm to find the optimal path otherwise reach the target point directly through diagonal distance.

The developed algorithm is implemented in MATLAB for the simulation to test the efficiency of the algorithm for different environments. The same path is considered to implement the experiment in the real-world environment. The ARDUINO microcontroller along with the ultrasonic sensor is considered to obtain the path length and time of travel of the robot to reach the goal point.

In this paper, a new hybrid algorithm has been developed to find the optimal path of the mobile robot using cuckoo search and BAs. The developed algorithm is tested with the real-world environment using the mobile robot.

The purpose of this study is to create a new fuel flow rate model adopting cuckoo search algorithm (CSA) for the climbing phase of the flight.

Using the real flight data records (FDRs) of B737-800 passenger aircraft, a new fuel flow rate model for the climbing phase of the flight was developed by incorporating CSA. In the model, fuel flow rate is given as a function of altitude and true airspeed. The aim is to create a model that yields results that are closest to the real fuel flow rate values obtained from flight data records. Various error analysis methods were used to test the accuracy of the obtained values. Finally, the effect of change of some CSA parameters on the model was investigated.

It was observed that the derived model is able to predict real fuel flow rate values with high accuracy. It has been deduced that increasing the number of nest (n) and discovery rate of alien nests (pa) values of CSA parameters to a certain value gradually decreases the model’s accuracy.

This model is considered to be useful in air traffic management decision support systems, simulation applications, aircraft trajectory prediction models and aircraft performance modelling studies because of the high accuracy accomplished by the CSA model.

The originality of this study is the development of a new fuel flow rate model using CSA as a first attempt in the literature. The use of real flight data is important for the originality and reliability of the model.

Intelligent prediction of node localization in wireless sensor networks (WSNs) is a major concern for researchers. The huge amount of data generated by modern sensor array systems required computationally efficient calibration techniques. This paper aims to improve localization accuracy by identifying obstacles in the optimization process and network scenarios.

The proposed method is used to incorporate distance estimation between nodes and packet transmission hop counts. This estimation is used in the proposed support vector machine (SVM) to find the network path using a time difference of arrival (TDoA)-based SVM. However, if the data set is noisy, SVM is prone to poor optimization, which leads to overlapping of target classes and the pathways through TDoA. The enhanced gray wolf optimization (EGWO) technique is introduced to eliminate overlapping target classes in the SVM.

The performance and efficacy of the model using existing TDoA methodologies are analyzed. The simulation results show that the proposed TDoA-EGWO achieves a higher rate of detection efficiency of 98% and control overhead of 97.8% and a better packet delivery ratio than other traditional methods.

The proposed method is successful in detecting the unknown position of the sensor node with a detection rate greater than that of other methods.

The growing incidence of precarious employment across many sectors is a serious challenge for a developing country like India. Neo-liberal arguments justify precarity as essential for the development of the free market economy and advocate realigning human resource practices with an ever-changing business environment and labor cost conditions. This chapter seeks to identify the determinants and dynamics surrounding precarity of workers engaged in temporary employment in India. It uses the unique Employment and Unemployment Survey data set published by the National Sample Survey Organisation of Government of India for two time periods 2009–2010 (66th Round) and 2011–2012 (68th Round) to bring out the dimensions of precarity and identify the determinants (both micro- and macro-levels) of participation in temporary employment. We find that precarious employment is most likely to affect the young, women, non-union members, those belonging to minority and socially deprived communities with low land holding and low educational status. Precarious employment is also most pronounced in states where labor-intensive industries are exposed to global import competition and where labor laws are rigid. The chapter concludes by discussing the implications of these findings for the economic and social policies that Indian governments have adopted in recent years.

There are ten universal principles of United Nations Global Compact in four areas namely human rights, labour, environmental and anti-corruption, and this chapter will explore the sixth principle of labour standard on elimination of discrimination in employment and occupation, in particular the doctrine of constructive dismissal in Malaysian labour relations. Constructive dismissal is creating a new challenge in labour relation in Malaysia.

This chapter specifically analyses some of the constructive dismissal awards and its implication to labour relations in Malaysia. The methodology employed in this chapter is the analysis of case laws using criterion-based sampling from the Industrial and Superior Court awards on constructive dismissal.

There has been an increasing number of awards on constructive dismissal made by the Malaysian Industrial Court over the last nine years. From the year 2009–2013, the Industrial Court has made 663 awards on constructive dismissal, mostly against employers. With compensation awarded to each employee amounted to as much as 24 months of back-pay salary plus a month’s pay for every year of service, employers can no longer neglect this pressing issue.

The concept of constructive dismissal falls within the purview of section 20 of the Industrial Relations Act 1967 in Malaysia. Constructive dismissal is a ‘deemed dismissal’ if an employer is guilty of a breach of the employment contract which goes to the root of the contract. It arises when a workman terminates his/her contract of employment and considers himself/herself discharged from further obligations because of the employer’s conduct.

With a good understanding of the constructive dismissal awards, it is expected that organizations will manage and treat their human resources as their greatest assets and prevent constructive dismissal claims from taking place. This will eventually help to improve and maintain harmonious labour relations. This chapter is likely to provide insights into the Malaysian labour relations environment for international business operations.

In the context of Malaysian labour relations, studies on constructive dismissal are limited as it is considered as a new area and a specific area of study. This chapter therefore hopes to fill the existing gap in the literature, to highlight some of the recent awards and lessons to prevent constructive dismissal claims from taking place and generally to contribute to the constructive dismissal literature.

Fall detection is a primary necessity for elderly people with medically tested nervous problems. This paper aims important to detect fall and prevent fatal injuries and untreated attention for long hours.

The project is focused on developing a smart shoe with force-sensitive resistors placed at plantar pressure points to detect fall. This could draw immediate medical attention to the patient. The device is developed using sensors, microcontroller and accelerometer integrated into a compact module. A rule-based detection algorithm helps in transmitting the alert to an Internet of Things device when a fall is detected.

Based on the pressure applied, there is a change in resistive value of force sensitivity resistor. When it reaches the threshold value, fall gets detected and alert gets triggered through telegram bot with latitude and longitude details of the location.

The challenge in developing this device is to make it wearable reducing the overall hardware complexity. The entire module placed inside the sole of the shoe avoids inconvenience to the patients.

The present chapter explicates urban and rural childhoods in India. It presents childhood as a dynamic product arising out of an intersection of children's experiences in different familial–socio-cultural contexts, and children's positions within parent–child interactions and relations. These contexts and interactions tend to colour and shape the childhoods that children inhabit. Drawing on fieldwork conducted in urban and rural India, the chapter documents (1) nature of children's engagements and (2) parent–child relations, explicitly observed in parent–child interactions, provisioning warmth and care; parental control and supervision over children and children's participation in the overall fabric of family life and so forth. Forty-eight parents (24 urban and 24 rural) of children aged 7–11 years participated in the study. Qualitative data gathered through semi-structured interviews and home observations revealed distinctions in urban and rural Indian childhoods. Urban childhood is characterised by rights and privileges, and the centrality of academic pursuits, while rural childhood is featured with subtle induction into economic and social fabric of rural life. Although the world of ‘Indian childhood’ seemed plural, childhood playfulness and learning seemed to be the unifying themes. Geared to the fact that children have to make a living with limited means in the future, both childhoods were accelerated in preparation for future. Dwelling on the complexities in children's lives, this article appreciates diversity and multiplicity in childhoods.

Recurrent pregnancy losses (RPL), a major contributor of reproductive wastage, affect maternal health both physically and mentally. Folate and B12 (Vitamin B12) deficiency anemia is common in the reproductive age group women in developing countries like India. And due to proven role of folate in various maternal and fetal anomalies, women are routinely prescribed folic acid under various national policies. However, B12 supplementation is rare, despite known deleterious effects of its deficiency. The purpose of this paper is to understand RPL through anemia with special reference to folate and B12 imbalance.

Multiparous women with normal obstetric outcomes (n=135) and women with Idiopathic RPL (n=105) were recruited in the study. All women were non-pregnant and belonged to North Indian population. Hb, serum folate and B12 and plasma homocysteine were measured in all the women. Anemia was classified according to WHO guidelines (Hemoglobin (Hb)<12g/dL).

The incidence of Anemia was more among normal multiparous women (73 percent) as compared to women with RPL (60 percent). However, unlike folate deficiency anemia among controls, B12 deficiency anemia was observed in women with RPL. Moreover, these women, despite being less anemic, with high B12 deficiency and folate sufficiency (presumably due to folate supplementation) had more imbalanced vitamin metabolism, as evident from homocysteine levels. The study suggests that anemic or non-anemic deficiencies of B12 and folate among women with RPL may be combated by screening for both vitamins, rather than supplementing folate indiscriminately to all.

One of the limitations is that ferritin levels for iron deficiency anemia could not be measured in this study.

The present study is the first study, to the best of our knowledge, where we looked for the role of imbalance of folate and B12 in women with RPL.

While technical vocational education training (TVET) has been studied in-depth, the evolution and performance patterns of the subject remain unknown and limited. A bibliometric analysis was performed to examine the global scientific literature to assess the state of the art in TVET research over the past 23 years.

The Web of Science (WoS) database was searched to explore TVET-related research from 1999 to 2021, resulting in the identification of 7,512 articles. The VOSviewer software was used to investigate the network of collaboration between authors, institutions, countries and author keywords.

The results reveal that the subject categories of “education” and “educational research” are the most prolific contributors to TVET-related research, with 3,314 articles. Most of the previous studies in Phase I (1999–2006) focussed on human capital resources development in the TVET sector. Phase II (2007–2014) follows with the centralisation of TVET, focussing on technology transition in education. However, in Phase III (2015–2021), researchers appear to focus on vocational studies in higher education towards increasing the productivity of human resources via the implementation of technology transition.

The valuable findings of this study can facilitate better understanding among scholars on the trends of TVET research developments and on the direction of future research.

Flow induced by rotating disks is of great practical importance in several engineering applications such as rotating heat exchangers, turbine disks, pumps and many more. The present research has been freshly displayed regarding the implementation of an engine oil-based Casson tri-hybrid nanofluid across a rotating disk in mass and heat transferal developments. The purpose of this study is to contemplate the attributes of the flowing tri-hybrid nanofluid by incorporating porosity effects and magnetization and velocity slip effects, viscous dissipation, radiating flux, temperature slip, chemical reaction and activation energy.

The articulated fluid flow is described by a set of partial differential equations which are converted into one set of higher-order ordinary differential equations (ODEs) by using convenient conversions. The numerical solution of this transformed set of ODEs has been spearheaded by using the effectual bvp4c scheme.

The acquired results show that the heat transmission rate for the Casson tri-hybrid nanofluid is intensified by, respectively, 9.54% and 11.93% when compared to the Casson hybrid nanofluid and Casson nanofluid. Also, the mass transmission rate for the Casson tri-hybrid nanofluid is augmented by 1.09% and 2.14%, respectively, when compared to the Casson hybrid nanofluid and Casson nanofluid.

The current investigation presents an educative response on how the flow profiles vary with changes in the inevitable flow parameters. As per authors’ knowledge, no such scrutinization has been carried out previously; therefore, our results are novel and unique.