Heavy Pressure Research Articles

Spatial and Temporal Variation of Selected Water Quality Parameters in the Tanzanian Side of Lake Victoria

Lake Victoria’s water quality is increasingly becoming under heavy pressure mainly due to land based activities and aerial inputs which are taking place within the basin. This study was carried out to assess the spatial, including vertical and temporal, variation of the water quality of Lake Victoria on the Tanzanian side. Historical water quality data for the period from 2000 to 2016 was collected. Temperature, pH, Dissolved Oxygen (DO) and Turbidity were selected for study since they are the mostly measured and monitored water quality parameters. Land use-land cover changes were analysed using ArcGIS. ILWIS 3.7 software was used to classify the land use and land cover for the years 2000, 2010 and 2014. MERIS was used to analyse the spatial variation. One-way ANOVA was employed to test the significant variation between different parameters. The results showed that, for the pelagic zone, the range of temperature, pH, DO, and turbidity were 22.8 oC-28.68 oC, 6.3-10.52, 3.42-10.21 mg/l, 1.0 NTU-15.8 NTU respectively. The corresponding values for the littoral zones were 22.3 oC-26.8 oC, 6.47-10.16, 3.99-8.6 mg/l, 1.3-347 NTU respectively. The ANOVA analysis results show that there was a significant variation of NO3(p<0.01). Temperature, pH and DO decreased with the lake depth to the bottom for both zones. For the littoral zone, a strong correlation was observed between temperature and depth, temperature and DO, and between temperature and pH with R2=0.6, p<0.03, R2=-0.78, p<0.01 and R2=0.96, p<0.01, respectively. The bare soil, urban settlements and farm land increased by 38.9%, 8.4% and 10.7% respectively from the year 2000 to 2014 on the Tanzanian side. This could have led to water quality changes. Water quality parameters varied significantly between pelagic and littoral zones. Littoral zones are mostly polluted and thus should be the priority pollution control intervention areas.

Diversity of Coastal Sand Dune (CSD) Vegetation along the Coast of Maharashtra, India

The sand dunes vegetation in coastal regions of Maharashtra is important ecosystems because of their small size, the different species found in habitat, and the beautiful landscapes they create. The current study investigated the vegetative status of sand dunes on Sindhudurg and Raigad district, west coast of Maharashtra. A survey of sand dune flora along coastal sand dune areas was done from October to December 2020 and 55 species belonging to 46 genera and 26 families are identified from study sites. The families like Fabaceae, Rubiaceae, Poaceae, Asteraceae, Lamiaceae and Malvaceae are dominant in study areas which show halophytic and xerophytic nature. The heavy pressure of tourism and development in coastal area shows negative effects on sand dune vegetation are seen during study.

Hardware-aware liquid state machine generation for 2D/3D Network-on-Chip platforms

The liquid state machine (LSM) is a spiking neural network (SNN) that usually is offline mapped to an NoC-based neuromorphic processor to perform a specific task. The creation of these LSM models does not consider the structure of Network on Chip (NoC) which results in heavy communication pressure on the NoC. This paper proposes a hardware-aware generation framework for the LSM network by considering the spatial distribution of neurons in the NoC. It is the first time for the LSM generation work with combining the characteristics of NoC. This framework also adopts the heuristic algorithm to search the hyperparameter for the LSM networks to achieve state-of-art accuracy. It also reduces the spikes generated by those LSM models. It keeps the communication between neurons within cores as much as possible, which could reduce the communication between cores effectively and improve the performance of NoC, including reducing the traffic flow, reducing the average latency, improving the throughput and reducing the total running time.

PostMan: Rapidly Mitigating Bursty Traffic via On-Demand Offloading of Packet Processing

Unexpected bursty traffic brought by certain sudden events, such as news in the spotlight on a social network or discounted items on sale, can cause severe load imbalance in backend services. Migrating hot data - the standard approach to achieve load balance - meets a challenge when handling such unexpected load imbalance, because migrating data will slow down the server that is already under heavy pressure. This article proposes PostMan, an alternative approach to rapidly mitigate load imbalance for services processing small requests. Motivated by the observation that processing large packets incurs far less CPU overhead than processing small ones, PostMan deploys a number of middleboxes called helpers to assemble small packets into large ones for the heavily-loaded server. This approach essentially offloads the overhead of packet processing from the heavily-loaded server to helpers. To minimize the overhead, PostMan activates helpers on demand, only when bursty traffic is detected. The heavily-loaded server determines when clients connect/disconnect to/from helpers based on the real-time load statistics. To tolerate helper failures, PostMan can migrate connections across helpers and can ensure packet ordering despite such migration. Driven by real-world workloads, our evaluation shows that, with the help of PostMan, a Memcached server can mitigate bursty traffic within hundreds of milliseconds, while migrating data takes tens of seconds and increases the latency during migration.

Social Capital, Intellectual Capital, and Audit Fee: Conflicting Evidence from Iran

In the current study, we investigate the impacts of social capital (SC) and intellectual capital (IC) on audit fees among the companies listed on the Tehran Stock Exchange (TSE). Since the criteria for the norms and the networks are extremely correlated, we used a principal component analysis (PCA) to construct an index of social capital for each province between 2011 and 2016. The Pulic model is also used as a proxy for measuring value added intellectual capital (VAIC). The ordinary least squares (OLS) regression is employed in this study to test our research hypotheses as well. According to the research literature, on the one hand, investors and lenders can be more confident in the financial reporting honesty of the firms headquartered in areas with high social capital; on the other hand, auditors judge the trustworthiness of their clients based on where the firm is headquartered. Inconsistent with the prior studies, our findings show that companies headquartered in provinces with high social capital pay higher audit fees. Given that Iranian firms are under heavy financial pressure due to economic sanctions, those companies located in areas with higher social capital likely have abused the high level of trust that auditors and other groups in the market have in them and participated in earnings manipulation to mask their weak financial performance. Among the various components of IC, we found strong evidence that employed capital efficiency (ECE) and audit costs correlated positively. In short, this paper sheds light on the fact that severe financial pressures on managers may sometimes lead them to take advantage of the dark side of social capital and intellectual capital when preparing financial reports.

Spatial-Reuse-Based Efficient Coexistence for Cellular and WiFi Systems in the Unlicensed Band

With the increasing data traffic in the fifth-generation (5G) communication system, the 5G new radio extended to unlicensed bands (5G NR-U) has become a promising approach to relieve the heavy pressure on the cellular system. To achieve the efficient coexistence with the WiFi system and improve the efficiency of temporal, spectral and spatial resource utilization, we first divide the transmission space into two subspaces by leveraging spatial reuse, where the data transmitted by cellular user equipments (UEs) falls into one subspace and the data transmitted by Internet of Things (IoT) devices coexisting with WiFi users through power control is in the other subspace. Then, the coexistence among cellular UEs, IoT devices, and WiFi users is formulated as an optimization model with the aim of maximizing the cellular system throughput via the joint power and subchannel allocation under the interference constraint. Although the resulting optimization problem is a mixed-integer nonlinear programmming, we decompose it into two subproblems and develop an alternating iterative approach to effectively solve them. Also, the closed-form allocations of the power and subchannels are obtained. Simulation results confirm that the proposed scheme can improve the cellular system performance and guarantee the coexistence in the unlicensed band.

Research on Postgraduates’ Physical Exercise Behavior and Motivation

In China, graduate students are facing heavy pressure from study, work and life. In order to change this situation, many colleges and universities have set up PE elective courses, but the proportion of elective courses is generally low, and the health status of students has not been fundamentally improved. The purpose of this study is to investigate the current situation and motivation of Postgraduates' physical exercise, and explore ways to attract more postgraduates to participate in physical exercise and promote their health. The study mainly adopts the methods of experiment and questionnaire. Two classes of students who chose PE elective courses are selected as the experimental objects. Students in Experimental class were given motivation stimulation, while another class were not. Sports stimulation includes combing family health history, inculcating the role through cases, monitoring students' physique, etc. The two classes had same exercise time (once a week, 90 minutes each time), same exercise method (intermittent cycle training for 16 weeks). In addition, this study uses Professor Chen Shanping's sports motivation scale to conduct a questionnaire survey on the graduate students participating in the experiment. Pearson analysis method in SPSS software was conducted to analyze the correlation between sports motivation and sports behavior. The students in the experimental class exercise better after class than those in the control class. Girls' physical and social motivation of physical exercise is much higher than boys, while boys' ability and motivation of physical exercise are significantly higher than boys. Different physical exercise motives have significant effects on physical exercise methods and physical exercise frequency. It is concluded that motivation stimulation is conducive to the formation of exercise behavior and there is a positive correlation between physical exercise motivation and physical exercise behavior.

Use of latent profile analysis and k-means clustering to identify student anxiety profiles

BackgroundAnxiety disorders are often the first presentation of psychopathology in youth and are considered the most common psychiatric disorders in children and adolescents. This study aimed to identify distinct student anxiety profiles to develop targeted interventions.MethodsA cross-sectional study was conducted with 9738 students in Yingshan County. Background characteristics were collected and Mental Health Test (MHT) were completed. Latent profile analysis (LPA) was applied to define student anxiety profiles, and then the analysis was repeated using k-means clustering.ResultsLPA yielded 3 profiles: the low-risk, mild-risk and high-risk groups, which comprised 29.5, 38.1 and 32.4% of the sample, respectively. Repeating the analysis using k-means clustering resulted in similar groupings. Most students in a particular k-means cluster were primarily in a single LPA-derived student profile. The multinomial ordinal logistic regression results showed that the high-risk group was more likely to be female, junior, and introverted, to live in a town, to have lower or average academic performance, to have heavy or average academic pressure, and to be in schools that have never or occasionally have organized mental health education activities.ConclusionsThe findings suggest that students with anxiety symptoms may be categorized into distinct profiles that are amenable to varying strategies for coordinated interventions.

Personal resources and their relationship to job crafting and burnout: a challenge for male nurses as a minority group

The heavy workload and pressure to which nurses are subjected leads to an increase in stress-related problems, such as burnout. Personal resources, such as job crafting, proactive personality, self-efficacy and regulatory focus are fundamental in palliating negative effects in the work environment and reducing quitting by male nurses. The objective of this study was to analyze individual differences, with attention to proactive personality, regulatory approach and general self-efficacy in job crafting, and to determine the predictive power of these variables for burnout in nurses. The sample was made up of 643 nurses. After correlation and descriptive analyses, multiple linear regression models were computed to find out the possible predictor role of the individual variables on burnout. The results showed that job crafting, proactive personality, general self-efficacy and the promotion regulatory focus were associated with a decrease in burnout in nurses. Similarly, the predictive models for each of the factors in burnout in all cases included the increase in structural resources dimension of job crafting as the variable with the most weight. Furthermore, self-efficacy, increase in job crafting social resources and proactive personality were mediators in this relationship for personal impact, social climate and job dissatisfaction factors of burnout. These findings are significant for improving performance of nurses and increasing their retention, which could be especially significant among male nurses.

Practice & SWOT Analysis of Drop-and-Pull Transportation Mode in Ningbo City

Entering the 21st century, the world’s road transportation industry has been developing rapidly. Many cargos were loaded and transshipped by road from one side of a country to the other side, instead of staying on boats, to save time. However, road transportation has been facing heavy pressures like high energy consumptions and pollution emissions. Therefore, an efficient and low-emission transportation mode, drop-and-pull (DP), emerged and was widely acknowledged all over the world. China’s Ministry of Transport started a pilot project of DP transportation in 2010. Several provinces and cities, including Ningbo City in Zhejiang Province, across the country were selected as pilot zones for DP transportation. Here, the practice of DP transportation mode in Ningbo is clearly depicted according to a dozen of logistics and shipping companies’ activities and an all-round SWOT analysis about Ningbo city is fully presented as a valuable reference for decision makers to precisely grip Ningbo’s advantages and further tailor Ningbo to suit the DP transportation mode better.

An Industry 4.0 Conceptual Model Proposal for Cable Harness Testing Equipment Industry

Nowadays, consumers search for organizations that can provide customized services at affordable prices. Therefore, it becomes essential for companies to meet those requirements by creating flexible and resilient production systems. Technological pathways such as industry 4.0 can represent a positive impact in the creation of those systems, through the integration of smart processes and technologies that can contribute to the automation of several activities within the shopfloor. Electrically controlled functions in passenger, commercial and special vehicles are becoming increasingly complex. If the signal and power cables were to be damaged, the vehicle’s operation would be affected, resulting in quality issues that can have a direct impact on safety, which can negatively affect the manufacturer’s reputation. Automotive manufacturers are thriving to achieve ever-growing mass customization, by offering a wide range of products, allowing for all clients to fulfill their needs. This scenario puts heavy pressure upon the cable harness industry, which must be as flexible as possible to supply all types of cables required by the automotive industry. This pressure is also extended to the enterprises that build test equipment for cable harnesses. In this context, the research group was able to plan an Industry 4.0 Network of Solutions that meets the requirements of the machining process of a cable harness testing equipment company, while compensating its flaws and optimizing it. The network is expected to promote the reduction of production cycle times in multiple activities, resulting in a production process that is expected to be more efficient and less prone to flaws.

How Harmful Is the Commercialization of Higher Education for the Academic and Social Environment?

The commercial market for higher education in Europe is expanding as governments cut spending on universities in the wake of the 2008 global economic crisis, and universities must be self-sufficient to survive. This commercialization is mainly reflected in the fact that universities begin to pay more attention to fund accumulation rather than improving academic value. With the continuous increase of tuition fees in colleges and universities, students are regarded as consumers and universities are essential commodities needed by consumers. Although commercialization of higher education has some beneficial aspects, such as more funds for schools to provide students with more advanced equipment and more comfortable learning environment, overall, the threat of commercialization to academic quality and social environment cannot be compensated for by those advantages. This paper aims to find out the two main reasons for the commercialization of higher education and the three threats to the social and academic environment brought by the marketing of higher education. Also, the paper also puts forward corresponding solutions for the three major risks; the two reasons analyzed in this paper are mainly the economic crisis and the development of globalization. The three threats are mainly aimed at the teaching quality of educational value and the financial pressure of students. At the same time, the paper gives three corresponding solutions to the threats. This paper argues that the commercialization of higher education severely hinders the improvement of educational value, reduces teaching quality, and brings heavy pressure to students' economy, which directly hinders the healthy development of higher education. If higher education institutions can adopt corresponding strategies to mitigate the threat of commercialization, the commercialization market of higher education may bring many opportunities for the development of higher education industry.

Differential equation to verify the validity of the model of the whole-person mental health education activity in Universities

Abstract College students are prone to psychological changes and personality distortions under heavy pressure. It will lead to catastrophe if it is not promptly guided or improperly used to reduce stress and relax. Now we integrate holistic education into the construction of the mental health education system in colleges and universities. This is conducive to solving practical problems and improving the effectiveness of system construction. We set up a differential equation model (DCE) based on the discrete choice to study mental health due to practice. At the same time, we adopt the mutual influence model of penetrating dissemination of thoughts and public opinion and human behaviour, and establish the SEIR DCE with constant input and bilinear incidence rate. The experiment verifies the algorithm’s effectiveness on the model of whole-person mental health education activities in colleges and universities.

Comparative Evaluation of the Stress Distribution and Transverse Displacement of the Circummaxillary Sutural System by Four Different Designs of Rapid Maxillary Expansion Appliances Using 3D Finite Element model: A Study Protocol

Background: In adolescent patient’s Rapid maxillary skeletal expansion (RME) is used with predictable clinical results for correcting transverse maxillary skeletal contraction. During RME, heavy force is directed towards the maxillary skeletal base. These forces also have effect on the palatal bone, adjacent skeletal structures and dentition. Tooth supported RME apply significant pressure on the teeth leading to varying amount of buccal inclination of premolars and molars and dental expansion. Implant assisted expanders take skeletal anchorage thus minimizing or negating the effect of heavy pressure on the teeth and supporting structures. Finite Element Analysis is a form of computer simulation. It is a non-invasive, precise method for obtaining quantitative and comprehensive knowledge about the physiological responses that occur in tissues. It outperforms other experimental methods because it creates a three-dimensional model that allows for simulation and analysis of orthodontic force systems in all three dimensions.
 Objective: The present study intends to make an assessment of four different RME designs (Banded HYRAX, Banded MARPE, MSE expander, Orthoeasy PAL expander) in terms of distribution of stress in the circummaxillary Sutural system and resulting displacement of the bones in the craniofacial complex upon activation of the respective appliance.
 Methodology: CBCT scan data of an adolescent patient will be taken from archives of a reputed scan centre. 3D skull model will be generated using CBCT data and .stl/ DICOM format will be converted into Finite Element model. The different types of RME appliances will be designed over the FE model. The expanders will be activated and the stresses generated at the sites of interest would be studied.
 Results: The study is expected to permit a clinician to select the design of RME appliances, which will produce suitable stress and displacement that will help to increase transverse width of maxilla to correct the underlying skeletal discrepancy.
 Conclusion: This study will help to arrive at a conclusion about which designs of RME will best suit clinical application of mechanics for orthopaedic expansion in a particular case.

The Association Between Sports, Body Image, and Eating Disorders of Males Teens at Eastside Catholic

In the past 25 years, the number of males who are dissatisfied with their bodies increased threefold. This is prevalent especially in the athletic field, where different physique expectations are closely associated with performance. Heightened focus on dietary rules and fitness level cause males to struggle with body dissatisfaction and shame and increase the risk of them developing eating disorders (ED), some of which are the most fatal mental illnesses. Many disordered eating behaviors stem from negative self-perceptions, which start to develop as early as the beginning of grade school and intensifies during pubertal development. However, most studies that examine this issue either looks at female college athletes who have a heavy exercise load and pressure from society on their physiques or focuses on social factors of peer pressure, family influence, and beauty standard. Therefore, it is imperative to determine whether sports participation is positively correlated with the rapidly growing rate of body image issues and ED symptoms in adolescent boys to help address them promptly and prevent severe and lasting damages. This quantitative case study conducted on male teens at Eastside Catholic High School (ECHS) found positive correlations between aesthetic/strength sports, body image issues, and higher ED risks, suggesting that athletic involvement plays a greater role in a person’s physical perception and mental health than body weight does. The conclusions inform education institutions and guardians of the more effective way to detect male adolescents’ body image issues and eating disorder symptoms, helping to prevent or alleviate mental illnesses.

Intrinsic and extrinsic motivations governing prey choice by hunters in a post-war African forest-savannah macromosaic.

Overhunting typically increases during and after armed conflicts, and may lead to regional-scale defaunation. The mitigation of hunting impacts is complex because, among other reasons, several intrinsic and extrinsic motivations underpin the elevated deployment of hunting practices. Here we present the first study focusing on these motivations in a post-war zone. Following persistently heavy hunting pressure during the 27-year Angolan civil war, the offtake of small to medium-bodied species has increased recently as a result of large mammal depletion. However, prey choice associated with different motivations varied in terms of species trophic level and body size. While most residents hunted large-bodied species to maximize revenues from wildlife trade, many low-trophic level smaller species were harvested to meet local subsistence demands because they were more palatable and could be captured using artisanal traps near hunters' households. Mainly low-trophic level species were killed in retaliation for crop-raiding or livestock depredation. Considering all game species sampled in this study, 96% were captured to attend two or more motivations. In addition, hunting associated with different motivations was partitioned in terms of age and gender, with prey acquisition for the wildlife trade primarily carried out by adult men, while hunting to meet local subsistence needs and inhibit human-wildlife conflicts were carried out by adult men and women, children and even the elderly. In natural savannah areas lacking fish as a source of protein, a higher number of species was selected to supply both the meat trade and subsistence, while more species in forest areas were targeted for trade in animal body parts and conflict retaliation. Finally, local commerce in bushmeat and other body parts accrued higher domestic revenues compared to any alternative sources of direct and indirect income. However, these financial benefits were at best modest, largely unsustainable in terms of prey population collapses, and generated high long-term costs for the local to regional scale economy and native biodiversity.

Environment Problems and Sustainable Development: with Special Reference to Thoothukudi District of Tamil Nadu

Productive resources, which are vital for economic development of nations, are primarily scarce among nations. Capital being an important productive resource is abundant in industrialized economics. Structural adjustments in developing economics due to the introduction of globalization, since 1991, enabled Indian economy to attract these productive resources in a massive scale. Being the second largest populated nations of the world, India is unable to exploit its labour resources fully, due to the scarce availability of capital. This is one of the main reasons, why India had not achieved the desired level of economic growth, as expected. However the flow of capital movements to India during the post reform period is encouraging. As a result, India has achieved the growth rate of GDP at 7.2% per annum recently. But due to the uncontrolled growth of urbanization and industrialization, expansion and massive intensification of agriculture and the destruction of forests has created heavy pressure on land, forests, water and biodiversity. In the era of globalization, water has considered as an economic goods due to the higher demand. Water quality problem arises due to the extractive industries as well as from various manufacturing and agricultural production processes. Various pollutants are generated as the by product in the production of Pesticides, leather goods, detergent, plastic, pulp and paper. These pollutants have led to major environmental issues such as Forest and Agricultural land degradation, Resource depletion (water, mineral, forest, sand, rocks etc.,), Environmental degradation, Public Health, Loss of Biodiversity, Loss of resilience in ecosystems, Livelihood Security for the Poor. In recent years there has been growing concern about degradation and pollution of environment and climate change as they impact on future development of both the developing and developed countries. In 1992, representatives of over 150 countries met at Rio in Brazil to discuss the environmental issues and their implications for future development of the world. This meeting at Rio is called the ‘Earth summit’ or the United Nations Conference on Environment and Development (UNCED).

Reconfigurable Intelligent Surface for Low-Latency Edge Computing in 6G

Edge computing, as one of the key technologies in 6G networks, establishes a distributed computing environment by deploying computation and storage resources in proximity to end users. However, the dense deployment of base stations, cellular dead zones, and high dynamics of mobile devices may cause serious interference issues and weak signal propagation, which will severely affect the transmission efficiency of edge computing and cannot support low-latency applications and services. Reconfigurable intelligent surface (RIS) is a new technology that can enhance the spectral efficiency and suppress interference of wireless communication by adaptively configuring massive low-cost passive reflecting elements. In this article, we introduce RIS into edge computing to support low-latency applications, where edge computing can alleviate the heavy computation pressure of mobile devices with ubiquitously distributed computing resources, and RIS can enhance the quality of the wireless communication link by intelligently altering the radio propagation environment. To elaborate the effectiveness of RIS for edge computing, we then propose a deep-reinforcement-learning-based computation offloading scheme to minimize the total offloading latency of mobile devices. Numerical results indicate that the RIS-aided scheme can improve wireless communication data rate and reduce task execution latency.

Baikal endemic sponge disease and anthropogenic factor

This article presents the results of observations of the state of the Baikal endemic sponge fauna (Fam. Lubomirskiidae) in the five-year dynamics against the background of their mass mortality. We indicate the change in the projective bottom cover with healthy and diseased sponges at two sites that are radically different from each other in the level of anthropogenic pressure. We also analyse the types of diseases and sponge species exposed to these at the study sites. We observe a significant decrease in the area of the projective bottom cover with healthy sponges both at the site experiencing heavy anthropogenic pressure and at the site where it is almost absent. However, our data have indicated great influence of the anthropogenic factor on the course of the disease and death of sponges. Degradation of sponges at the anthropogenically unfavourable site began much earlier than that at the site with the minimum anthropogenic impact. The most common species are the most susceptible to all types of diseases. At the same time, there is a catastrophic decrease in the abundance of the only branching species in Lake Baikal, Lubomirskia baikalensis.

Energy-Efficient UAV Assisted Secure Relay Transmission via Cooperative Computation Offloading

With the continuous development of B5G/6G cellular networks, the explosive growth of mobile Internet services and the resulting tremendous traffic demand have led to a significantly heavy pressure on how to efficiently satisfy the users’ traffic demands with guaranteed quality of services, especially the coverage at the cell-edge. Thanks to the advantage in flexible deployment, the unmanned aerial vehicle (UAV) has been considered as a promising approach for providing efficient data access for cell-edge users (CEUs), which usually suffer from a poor connection to the cellular base stations (BSs). In this paper, we consider a scenario of a group of CEUs with each CEU having both the task of delivering data to the cellular BS (i.e., the data-transmission task) and the task of completing a given computation workload (i.e., the computation-task). Meanwhile, we consider that the UAV serves as a dual-role (DUAV), i.e., the relay for forwarding CEUs’ data to the cellular BS, and the edge-server for processing the CEUs’ offloaded computation workloads. Taking into account that a malicious node which overhears the DUAV’s relay transmission, we investigate the secrecy driven UAV assisted relay transmission via cooperative computation offloading, in which we exploit the CEUs’ computation-offloading transmission to provide cooperative jamming to the malicious node who overhears the DUAV’s relay transmission. Specifically, we formulate a joint optimization of the DUAV’s hovering position, transmit-power and computation-rate allocation as well as the CEUs’ transmission duration and computation offloading, with the objective of minimizing the total energy consumption of the DUAV and all CEUs. Despite the non-convexity of the formulated joint optimization problem, we propose an efficient algorithm for finding the optimal solution. With the optimal offloading and transmission solutions provided by the polyblock approximation based algorithm (PA-Algorithm) under the given hovering point as a subroutine, we further optimize the DUAV’s hovering position by proposing a precoding-based Cross-Entropy algorithm (PBCE-Algorithm) for finding the DUAV’s optimal hovering position. In particular, by properly precoding the feasible region for hovering, our PBCE-Algorithm can outperform some existing algorithms in terms of accuracy and efficiency. To further reduce the computational complexity, we also propose a low-complexity algorithm for solving the joint optimization problem. Numerical results demonstrate the efficiency of our proposed algorithms and the performance advantage of our proposed secrecy driven UAV assisted relay transmission via cooperative computation offloading.