| 1. |
- Duy, Duong The, et al.
(author)
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Assessment of the impacts of social capital on the profit of shrimp farming production in the Mekong Delta, Vietnam
- 2022
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In: Aquaculture Economics & Management. - : Informa UK Limited. - 1365-7305 .- 1551-8663. ; 26:2, s. 152-170
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Journal article (peer-reviewed)abstract
- This study assesses capital assets and factors influencing on farmers’ decision to participate in social networks, and how these contribute to and affect household’s profits of small-scale shrimp farmers in four coastal provinces in the Mekong Delta, Vietnam. Data was collected through observations, and informal discussions and interviews with 350 small-scale shrimp farmer households. The results show that farmer’s age, education of household head, dependency ratio, village residence time, village population density are important factors influencing positively on shrimp farmers´ participation in social networks. The study also shows that contacts with fisheries association, traders, wholesale agencies, trust, household savings, labors’ education, household’s agricultural land size, post larvae quality and equipment significantly influenced on the profit variable with 1–10%. The results also indicate that a 10% increase in social capital would bring an increase in household income of 3.9%.
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| 2. |
- Kirkland, Thomas A., et al.
(author)
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Synthesis of glutamic acid analogs as potent inhibitors of leukotriene A(4) hydrolase
- 2008
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In: Bioorganic & Medicinal Chemistry. - : Elsevier BV. - 0968-0896 .- 1464-3391. ; 16:9, s. 4963-4983
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Journal article (peer-reviewed)abstract
- Leukotriene B-4 (LTB4) is a potent pro-inflammatory mediator that has been implicated in the pathogenesis of multiple diseases, including psoriasis, inflammatory bowel disease, multiple sclerosis and asthma. As a method to decrease the level of LTB4 and possibly identify novel treatments, inhibitors of the LTB4 biosynthetic enzyme, leukotriene A(4) hydrolase (LTA(4)-h), have been explored. Here we describe the discovery of a potent inhibitor of LTA(4)-h, arylamide of glutamic acid 4f, starting from the corresponding glycinamide 2. Analogs of 4f are then described, focusing on compounds that are both active and stable in whole blood. This effort culminated in the identification of amino alcohol 12a and amino ester 6b which meet these criteria.
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| 3. |
- Kowal, Marta, et al.
(author)
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Reasons for Facebook Usage : Data From 46 Countries
- 2020
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In: Frontiers in Psychology. - : Frontiers Media SA. - 1664-1078. ; 11
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Journal article (peer-reviewed)abstract
- Introduction: Seventy-nine percent of internet users use Facebook, and on average they access Facebook eight times a day (Greenwood et al., 2016). To put these numbers into perspective, according to Clement (2019), around 30% of the world's population uses this Online Social Network (OSN) site.Despite the constantly growing body of academic research on Facebook (Chou et al., 2009; Back et al., 2010; Kaplan and Haenlein, 2010; McAndrew and Jeong, 2012; Wilson et al., 2012; Krasnova et al., 2017), there remains limited research regarding the motivation behind Facebook use across different cultures. Our main goal was to collect data from a large cross-cultural sample of Facebook users to examine the roles of sex, age, and, most importantly, cultural differences underlying Facebook use.
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| 4. |
- Phu, Vu Dinh, et al.
(author)
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Ventilator-associated respiratory infection in a resource-restricted setting: impact and etiology
- 2017
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In: Journal of Intensive Care. - : BioMed Central (BMC). - 2052-0492. ; 5
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Journal article (peer-reviewed)abstract
- Ventilator-associated respiratory infection (VARI) is a significant problem in resource-restricted intensive care units (ICUs), but differences in casemix and etiology means VARI in resource-restricted ICUs may be different from that found in resource-rich units. Data from these settings are vital to plan preventative interventions and assess their cost-effectiveness, but few are available.
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| 5. |
- Trinh, Lan Anh, et al.
(author)
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Fault Tolerance Analysis for Dependable Autonomous Agents Using Colored Time Petri Nets
- 2017
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In: ICAART. - : SCITEPRESS - Science and Technology Publications. ; , s. 228-235
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Conference paper (peer-reviewed)abstract
- Fault tolerance has become more and more important in the development of autonomous systems with the aim to help the system to recover its normal activities even when some failures happen. Yet, one of the concerns is how to analyze the reliability of a fault tolerance mechanism with regards to the collaboration of multiple agents to complete a complicated task. To do so, an approach of fault tolerance analysis with the colored time Petri net framework is proposed in this work, where a task can be represented by a tree of different concurrent and dependent subtasks to assign to agents. Different subtasks and agents are modeled by color tokens in Petri network. The time values are added to evaluate the processing performance of the whole system with respect to its ability to solve a task with fault tolerance ability. The colored time Petri nets are then tested with simulation of centralized and distributed systems. Finally the experiments are performed to show the feasibility of the proposed approach. From the basics of this study, a generalized framework in the future can be developed to address the fault tolerance analysis for a set of agents working with a sophisticated plan to achieve a common target.
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| 6. |
- Trinh, Lan Anh, et al.
(author)
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Petri Net Based Navigation Planning with Dipole Field and Dynamic Window Approach for Collision Avoidance
- 2019
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In: International Conference on Control, Decision and Information Technologies CoDIT. - 9781728105215 ; , s. 1013-1018
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Conference paper (peer-reviewed)abstract
- This paper presents a novel path planning system for multiple robots working in an uncontrolled environment in the presence of humans. The approach combines the use of Petri net to plan the movement of multiple robots to prevent the risk of congestion caused by routing several robots into a narrow region, together with a dipole field with dynamic window approach to avoid collisions of a robot with dynamic obstacles. By regarding the velocity and direction of both humans and robots as a source of magnetic dipole moment, the dipole-dipole interaction between the moving objects will generate repulsive forces to prevent collisions. The whole system is presented on robot operating system platform so that its implementation can be extendable into real robots. Experimental results with Gazebo simulator demonstrates the effectiveness of the proposed approach.
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| 7. |
- Trinh, Lan Anh
(author)
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Toward Dependable Multiple Path Planning for Autonomous Robots with Obstacle Avoidance and Congestion Control
- 2022
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Doctoral thesis (other academic/artistic)abstract
- Over decades, automatic robots that are pre-programmed to perform repetitive tasks in industrial production has been reaching the cutting edge of technology. There is emerging the next development with autonomous control, where a robot is able to have some levels of its own decision, i.e. self-governing, without direct controls from humans. This brings autonomous robots extensively applicable not only in industry but also in commonly accessible services in our daily life such as self-driving cars, automated health care, or entertainment. Yet, one of the backbone of the robotic system, the navigation and path planning, has to face more and more challenges including unstructured environments, uncertainty of moving objects, coexist with humans, and multiple robotic agents. Aiming toward a dependable, i.e. available, reliable, and safe, path planning system to overcome such challenges, this thesis proposes the development of multiple path planning along with obstacle avoidance and congestion control algorithms. At first, a novel dipole flow field, which is constructed from a flow field to drive robots to their goals and a dipole field to push robots far away from potential collision directions, is proposed. The algorithm is efficient in implementation yet is able to overcome the drawback of conventional field-based approach, which is easily trapped by a local optimisation of energy functions. Secondly, a congestion control mechanism with Petri net is developed to synchronise the movement of robots when they enter in a cross or narrow area. Different Petri nets are evaluated to find the optimal configuration to reduce the traffic jam through possible conflict regions. In the next contribution, the dead- or live-lock problem of a path planning system is addressed. The solution is based on multiple path planning where each robot has alternative paths to the goal. All robots in the same working space communicate with each other to update their locations and paths so that the appropriate configuration can be chosen to avoid potential deadlocks. The algorithm also takes into account the obstacle avoidance so that the robots are able to avoid mutual collisions as well as collisions with unexpected moving objects like humans. Finally, a distributed multiple path planning algorithm is implemented to help the system to deal with some level of failures, which happens when the central controlling system of robots stops working or a part of communication network between the robots is unexpectedly disconnected. The proposed approaches have been evaluated by extensive experiments to show their effectiveness in addressing collisions, congestion, as well as deadlocks. The implementation of the algorithms has been performed on widely accessible platform, robot operating system (ROS) and transferred into real robots.
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| 8. |
- Walter, Kathryn, et al.
(author)
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Sex Differences in Mate Preferences Across 45 Countries : A Large-Scale Replication
- 2020
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In: Psychological Science. - : SAGE Publications. - 0956-7976 .- 1467-9280. ; 31:4, s. 408-423
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Journal article (peer-reviewed)abstract
- Considerable research has examined human mate preferences across cultures, finding universal sex differences in preferences for attractiveness and resources as well as sources of systematic cultural variation. Two competing perspectives-an evolutionary psychological perspective and a biosocial role perspective-offer alternative explanations for these findings. However, the original data on which each perspective relies are decades old, and the literature is fraught with conflicting methods, analyses, results, and conclusions. Using a new 45-country sample (N = 14,399), we attempted to replicate classic studies and test both the evolutionary and biosocial role perspectives. Support for universal sex differences in preferences remains robust: Men, more than women, prefer attractive, young mates, and women, more than men, prefer older mates with financial prospects. Cross-culturally, both sexes have mates closer to their own ages as gender equality increases. Beyond age of partner, neither pathogen prevalence nor gender equality robustly predicted sex differences or preferences across countries.
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| 9. |
- Aad, G., et al.
(author)
-
- 2012
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swepub:Mat__t (peer-reviewed)
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