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7 results for “PPO”
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Research ArticleOpen accessIn the keywordsMulti-Satellite Custody of Moving Ground TargetsDavid SchusterMaintaining persistent custody of ground targets from Low Earth Orbit (LEO) is a key challenge in space-based surveillance and reconnaissance. Traditional rule-based tasking strategies struggle with scalability as the number of assets and targets grows. In this paper, we present a centralized Reinforcement Learning (RL) approach using Proximal Policy Optimization (PPO) to coordinate four LEO satellites tasked with tracking two … …Journal of Computer Science, Vol. 22, Issue 3 · 25 Mar 2026 · 1,575 accessesView PDFCite
Research ArticleOpen accessIn the keywordsA Lightweight PyBullet-Based Framework for Fast Reinforcement Learning Prototyping on 6-DOF Robotic ArmsNgoc Kim Khanh Nguyen, Anh Thu Mang, Quang NguyenControlling 6-Degree-of-Freedom (6-DOF) robotic arms for precise manipulation tasks is challenging due to kinematic redundancy and the complexity of existing simulation environments like MuJoCo or ROS-Gazebo. This paper presents ArmReach6DOFEnv, a lightweight, open-source simulation framework built on PyBullet for rapid Reinforcement Learning (RL) prototyping on 6-DOF robotic arms. Using a Universal Robot Description Format (URDF) model, the environment supports a … …Journal of Mechatronics and Robotics, Vol. 9, Issue 1 · 11 Feb 2026 · 3,071 accessesView PDFCite
Research ArticleOpen accessIn the keywordsThe Evolution of Today's Health Care EconomyEldo E. Frezza, Maurizio Chiriva-InternatiThe health care economy has fluctuated in the last 30 years. One of the contributing factors has been the reimbursement schemes used by hospitals and physicians, which has had a considerable impact on the behavior and performance of the health care market. Unlike health care markets in other countries, the U.S. has a multi-payer system. These third-party payers include the … …Journal of Social Sciences, Vol. 1, Issue 1 · 31 Mar 2005 · 6,655 accessesView PDFCite
Research ArticleOpen accessIn the abstractPerformance of Stocker Cattle Managed On Pastures Over-Seeded With Annual ForagesMichael Martinez, Daniela Brown, Sidney Garrison et al.The goal of this study was to determine the performance of stocker calves managed on permanent pastures over-seeded with winter and summer annuals. Twenty-one 7-month-old Angus calves (BW = 263 ± 24 kg) sourced from the university farm, were randomly assigned to three treatments. The treatments were: i) Grass Hay Only (GHO; Control; 5 calves), ii) Permanent Pasture Only (PPO; … …American Journal of Animal and Veterinary Sciences, Vol. 21, Issue 2 · 5 Aug 2026 · 889 accessesView PDFCite
Research ArticleOpen accessIn the abstractCharacterization of Crude Polyphenol Oxidase Activity in Buckwheat SproutsYuedong Song, Yangfang Zhang, Yilin Wang et al.Buckwheat sprouts can not only effectively reduce the trypsin inhibitor in buckwheat grain, but also improve the content of bioactive ingredients such as flavonoids and other effective components. However, Polyphenol Oxidase (PPO) in buckwheat sprouts causes browning of food, which limits the application of buckwheat sprouts in food. In addressing this problem, studying the characteristics of PPO in buckwheat sprouts … …American Journal of Biochemistry and Biotechnology, Vol. 17, Issue 2 · 25 Jun 2021 · 6,486 accessesView PDFCite
Research ArticleOpen accessIn the abstractDistribution of Polyphenol Oxidase in some Cruciferae VegetablesAndi Nur Faidah Rahman, Februadi Bastian, Jumriah Langkong, Shuji FujitaEnzymatic oxidation of polyphenolic compounds in damaged tissue of many fruits and vegetables induced undesirable browning as results in decreased marketability of products. A new type of polyphenol oxidase (PPO) that is “Phloroglucinol Oxidase (PhO)” have been reported in turnip and cabbage, and the purified enzymes also had strong peroxidase (POD) activity. Distribution of PPO from different plant source of … …American Journal of Applied Sciences, Vol. 13, Issue 1 · 31 Jan 2016 · 8,093 accessesView PDFCite
Research ArticleOpen accessIn the abstractChilling Injury in Mamey Sapote Fruit (Pouteria sapota): Biochemical and Physiological ResponsesGuillermo O. Pérez-Tello, Miguel Ángel Martínez-Téllez, Irasema Vargas-Arispuro, Gustavo A. González-AguilarProblem statement: Cold storage is needed in order to delay senescence and achieve a longer commercial life of tropical fruits like mamey sapote (Pouteria sapota), therefore, the physiological and biochemical responses of this fruit to cold storage were evaluated. Approach: Samples from different storage temperature (20, 10 and 2°C) were taken at five-day intervals and Chilling Injury Index (CII), decay … …American Journal of Agricultural and Biological Sciences, Vol. 4, Issue 2 · 30 Jun 2009 · 9,162 accessesView PDFCite