Science Talks最新文献_第5页

LTES with PCM and metal foam in convergent and divergent shell and tube configurations assuming external heat loss LTES与PCM和金属泡沫在会聚和发散壳和管配置假设外部热损失

Science Talks Pub Date : 2025-06-01 Epub Date: 2025-03-19 DOI: 10.1016/j.sctalk.2025.100446

Renato Elpidio Plomitallo , Bernardo Buonomo , Oronzio Manca , Sergio Nardini , Giulia Righetti , Simone Mancin

{"title":"LTES with PCM and metal foam in convergent and divergent shell and tube configurations assuming external heat loss","authors":"Renato Elpidio Plomitallo , Bernardo Buonomo , Oronzio Manca , Sergio Nardini , Giulia Righetti , Simone Mancin","doi":"10.1016/j.sctalk.2025.100446","DOIUrl":"10.1016/j.sctalk.2025.100446","url":null,"abstract":"<div><div>Thermal energy storage (TES) systems have become highly relevant due to the need to cut carbon emissions, and one of the most promising TES systems is the latent heat one (LTES) based on phase change materials (PCMs). However, the low thermal conductivity and poor heat transfer capabilities of PCMs limit their performance. The LTES, which in this study incorporate phase change materials (PCMs) and metal foams, offer key benefits over traditional sensible heat storage options. The inclusion of metal foams increases the thermal conductivity of PCMs. This research examines a vertical shell-and-tube setup with a non-uniform internal tube cross-section, considering two different configurations: convergent internal tube and divergent one. It is also considered an inclination angle variation of the internal tube. In addition, it is made the assumption of external heat losses on the lateral surface. Heat transfer and phase change processes are analyzed using the Brinkman-Forchheimer-extended Darcy model and the enthalpy-porosity approach. The numerical solutions are performed through Ansys-Fluent. Findings indicate that LTES systems using metal foam and PCM have improved heat transfer, particularly in configurations with converging tube sections. Although higher heat loss during the melting, the convergent configuration has the faster melting time at each inclination angle.</div></div>","PeriodicalId":101148,"journal":{"name":"Science Talks","volume":"14 ","pages":"Article 100446"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The development of interprofessional training tools in shared decision-making; a shared journey 共同决策的跨专业培训工具的开发；共同的旅程

Science Talks Pub Date : 2025-06-01 Epub Date: 2025-05-14 DOI: 10.1016/j.sctalk.2025.100464

Alice T. Bakker , Loes J. Peters , Janita Bakker , Dirk T. Ubbink

{"title":"The development of interprofessional training tools in shared decision-making; a shared journey","authors":"Alice T. Bakker , Loes J. Peters , Janita Bakker , Dirk T. Ubbink","doi":"10.1016/j.sctalk.2025.100464","DOIUrl":"10.1016/j.sctalk.2025.100464","url":null,"abstract":"<div><div>The implementation program of Shared Decision Making (SDM) in medical and nursing curricula was part of the national program Uitkomstgerichte Zorg (UZ) (Outcome-Oriented Care) in the Netherlands. This initiative was embedded in evolving policies aiming to restructure care. Together with the Netherlands Patients Federation, Netherlands Federation of University Medical Centres, Dutch Federation of Medical Specialists, and the Dutch Professional Nurse Practitioner Organisation, the project was successfully completed in 2023. The result is a comprehensive educational package with support materials to help educators integrate SDM into national curricula.</div><div>An evaluation among stakeholders and research in three hospitals revealed challenges in implementing SDM in clinical practice. Although healthcare providers report proficiency in SDM, its application, measured with the OPTION-5 instrument, remains limited. Interprofessional collaboration is critical, but role division is often unclear. Nurses, in particular, express uncertainty about their role and see opportunities for improvement. Continuing education on SDM is scarce, with healthcare providers primarily acquiring these skills informally through colleagues or experiential learning.</div><div>This program highlights the need for clear role definitions and structured training to embed SDM into clinical practice effectively, bridging the gap between self-reported competence and observed implementation.</div></div>","PeriodicalId":101148,"journal":{"name":"Science Talks","volume":"14 ","pages":"Article 100464"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144169363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Looking for equivalence between maximum likelihood and sparse DOA estimators 寻找最大似然估计和稀疏DOA估计之间的等价性

Science Talks Pub Date : 2025-06-01 Epub Date: 2025-03-13 DOI: 10.1016/j.sctalk.2025.100449

Thomas Aussaguès , Anne Ferréol , Alice Delmer , Pascal Larzabal

引用次数: 0

Chaos control of brushless direct current motor using sliding mode control with a low cost hardware-in-loop validation 基于滑模控制的无刷直流电机混沌控制，低成本硬件在环验证

Science Talks Pub Date : 2025-06-01 Epub Date: 2025-03-19 DOI: 10.1016/j.sctalk.2025.100453

Arif Iqbal

引用次数: 0

Extracting analytic singular values from a polynomial matrix 从多项式矩阵中提取解析奇异值

Science Talks Pub Date : 2025-06-01 Epub Date: 2025-03-19 DOI: 10.1016/j.sctalk.2025.100452

Faizan A. Khattak, Mohammed Bakhit, Ian K. Proudler, Stephan Weiss

引用次数: 0

Background noise in acoustic-based non-intrusive condition monitoring of steam traps 基于声学的非侵入式蒸汽疏水阀状态监测中的背景噪声

Science Talks Pub Date : 2025-06-01 Epub Date: 2025-03-28 DOI: 10.1016/j.sctalk.2025.100455

Vitaliy Sechenyh, Sean Swift, Piyush Lakhani, Julien Porré

{"title":"Background noise in acoustic-based non-intrusive condition monitoring of steam traps","authors":"Vitaliy Sechenyh, Sean Swift, Piyush Lakhani, Julien Porré","doi":"10.1016/j.sctalk.2025.100455","DOIUrl":"10.1016/j.sctalk.2025.100455","url":null,"abstract":"<div><div>Environmental impact from operation of steam and condensate systems can be reduced by an introduction of condition monitoring. Benefits of condition monitoring include reduction of downtime and repair costs, maintenance schedules optimisation, and potential reduction of safety risks. The use of acoustic-based monitoring provides an advanced approach which is non-intrusive to steam traps operation. However, acoustic signals in an industrial environment can be affected by background noise from neighboring operating equipment which poses a challenge in a development of condition monitoring methods. Acoustic-based methods are sensitive to noise emitted by condensate pumps, blowdown valves, maintenance works, leaking isolation valves, pressure reducing valves, pressure maintaining valves, etc. This study is aiming to highlight the importance of distinguishing operational regimes of monitored steam traps from various background noise sources. This study includes a review with demonstration of different cases of background noise in steam and condensate systems with outcomes of condition monitoring based on analysis of acoustic signals recorded at various manufacturing facilities. This study showed that background noise emitted by pressure maintaining valves and nearby steam traps reduces accuracy of condition monitoring the most. While short events and periodic noise only affect steam leakage rate estimations.</div></div>","PeriodicalId":101148,"journal":{"name":"Science Talks","volume":"14 ","pages":"Article 100455"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143791757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrothermal carbonization of digested sludge from wastewater treatment plants: Processes, potential and key challenges 废水处理厂消化污泥的水热碳化：工艺、潜力和关键挑战

Science Talks Pub Date : 2025-06-01 Epub Date: 2025-04-03 DOI: 10.1016/j.sctalk.2025.100457

Nina Kossińska , Renata Krzyżyńska , Heba Ghazal , Hussam Jouhara , Marzena Kwapińska , Witold Kwapiński

{"title":"Hydrothermal carbonization of digested sludge from wastewater treatment plants: Processes, potential and key challenges","authors":"Nina Kossińska , Renata Krzyżyńska , Heba Ghazal , Hussam Jouhara , Marzena Kwapińska , Witold Kwapiński","doi":"10.1016/j.sctalk.2025.100457","DOIUrl":"10.1016/j.sctalk.2025.100457","url":null,"abstract":"<div><div>The presentation reviews hydrothermal carbonization of digested sludge as a complementary technology for sludge management at wastewater treatment plants. The motivation for expanding the knowledge of hydrothermal carbonization is the challenges of wastewater treatment plants: the increasing volume of sludge, high moisture content, the presence of organic and inorganic contaminants, rising disposal costs, and legislative amendments. Hydrothermal carbonization makes it possible to convert wet sludge under conditions (160–250 °C,10–30 bar) into hydrophobic hydrochars, but also liquids and gases, eliminating the need for drying. The process also offers heat recovery and integration into existing wastewater treatment plant infrastructure. A key aspect of implementing hydrothermal carbonization is understanding the impact of individual process parameters and their interactions on chemical reaction pathways, and optimizing operating conditions for specific applications. The presentation discusses two pathways for hydrochar utilization: as soil additives or as fuels in thermal processes, assessing their environmental and legal potential. Process liquids were evaluated as a source of valuable resources that can be recovered or used in situ. Despite the compatibility of hydrothermal carbonization with Green Deal policies, challenges related to energy efficiency, legislative compliance, public acceptance, and high investment costs for integrated thermal technologies still need to be addressed. Overcoming these barriers will enable the implementation of hydrothermal carbonization as a sustainable technology in a circular economy.</div></div>","PeriodicalId":101148,"journal":{"name":"Science Talks","volume":"14 ","pages":"Article 100457"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

FreeFlow: A framework for server-driven mobile apps FreeFlow：一个服务器驱动的移动应用框架

Science Talks Pub Date : 2025-06-01 Epub Date: 2025-03-05 DOI: 10.1016/j.sctalk.2025.100445

Nabhya Sharma, Ravindra Nath Tripathi, Vikas Tripathi

{"title":"FreeFlow: A framework for server-driven mobile apps","authors":"Nabhya Sharma, Ravindra Nath Tripathi, Vikas Tripathi","doi":"10.1016/j.sctalk.2025.100445","DOIUrl":"10.1016/j.sctalk.2025.100445","url":null,"abstract":"<div><div>With the increasing demand for instant user reach in mobile applications, developers are seeking solutions that provide seamless and continuous updates to users without manual intervention. The Freeflow framework addresses this need by enabling fully server-driven mobile applications that update automatically, without requiring distribution through app stores. Freeflow supports devices running Android (version 5.0/API 21 and above) and iOS (version 12 and above), ensuring broad compatibility across platforms. This framework allows the UI to be dynamically constructed and modified on the server side using TypeScript, encompassing all screens the user may interact with. Upon app initialization, a single HTTP POST request is sent from the application to the server, retrieving both data and UI code. The server combines the TypeScript UI code with relevant data, converts it into a JSON structure, which is then transmitted back to the mobile device. The JSON is then parsed on the client side using Flutter's Widget Engine, enabling real-time rendering of UI components based on server-provided instructions. By breaking down JSON into Flutter widgets, Freeflow empowers applications with adaptive, responsive UIs that can be updated instantaneously. The impact of Freeflow is significant: developers can rapidly deploy updates, saving resources and bypassing app store distribution processes. Illustrative applications include eCommerce platforms and geosensing apps, where constant updates are essential. Freeflow's code is publicly available for developers, offering a flexible solution for modern, progressive applications that prioritize user engagement and real-time updates.</div></div>","PeriodicalId":101148,"journal":{"name":"Science Talks","volume":"14 ","pages":"Article 100445"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Perceived food saltiness vs actual NaCl content – An inspiration for innovation of reduced-salt foods 感知到的食物咸度与实际的NaCl含量——对低盐食品创新的启发

Science Talks Pub Date : 2025-06-01 Epub Date: 2025-04-01 DOI: 10.1016/j.sctalk.2025.100456

Sara R. Jaeger , Hanna Johannesson , Josefin Svensson , Madeleine Jönsson , Anna Calvén , Karin Wendin

{"title":"Perceived food saltiness vs actual NaCl content – An inspiration for innovation of reduced-salt foods","authors":"Sara R. Jaeger , Hanna Johannesson , Josefin Svensson , Madeleine Jönsson , Anna Calvén , Karin Wendin","doi":"10.1016/j.sctalk.2025.100456","DOIUrl":"10.1016/j.sctalk.2025.100456","url":null,"abstract":"<div><div>Globally, dietary salt intake significantly exceeds the WHO's recommendations of 5 g/day. A high salt intake can lead to high blood pressure which increases the risk of serious diseases such as cardiovascular diseases and stroke. It is known that some foods are perceived as saltier than their actual salt content. Such foods may have a “salt substitution potential” to be used in product development of food that are perceived saltier than their actual salt content.</div><div>The aim was 1) to quantify perception of saltiness in a broad range of foods as perceived by consumers; 2) to identify foods that have a high “salt substitution potential”.</div><div>318 participants answered an online survey on perceived saltiness of 59 common foods. By comparing actual salt content with perceived saltiness, a “salt substitution index” was calculated for each of the food items.</div><div>Results showed that balsamic vinegar, followed by tomato puree and cheese pufs had the high salt substitution potential. Perception of a higher salinity than the actual salt content may be explained by the distribution of salt. It may also be explained by associations to saltiness, preferences and sensitivity. This may help guide reduced-salt product innovation efforts and contribute to improved dietary health.</div></div>","PeriodicalId":101148,"journal":{"name":"Science Talks","volume":"14 ","pages":"Article 100456"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Peer patient round table: FNP student evaluation of clinical performance 同侪病人圆桌会议：FNP学生临床表现评估

Science Talks Pub Date : 2025-06-01 Epub Date: 2025-04-29 DOI: 10.1016/j.sctalk.2025.100460

Marjorie Young, Carey Cole, Eunyoung Lee

{"title":"Peer patient round table: FNP student evaluation of clinical performance","authors":"Marjorie Young, Carey Cole, Eunyoung Lee","doi":"10.1016/j.sctalk.2025.100460","DOIUrl":"10.1016/j.sctalk.2025.100460","url":null,"abstract":"<div><h3>Backgrounds</h3><div>Clinical performance is a crucial part of evaluation in FNP education and has traditionally been accomplished through faculty site visits. The evolution of distance learning, online programs, and the COVID-19 pandemic have further complicated the difficulty of completing site visits, requiring innovation in education. The Peer Patient Round Table (PPRT) was developed as the alternative evaluation method of student performance. In the PPRT method, students are involved in the shared role-play of three roles a patient, a nurse practitioner student, and a preceptor in individual scenarios.</div></div><div><h3>Purpose</h3><div>This project evaluated the PPRT experiences of students and faculty.</div></div><div><h3>Methods</h3><div>A mixed-method post-intervention pilot study was conducted using a qualitative and quantitative survey, among 14 NP students and 4 faculty who participated in the PPRT sessions during the COVID-19 pandemic.</div></div><div><h3>Results/conclusions</h3><div>Both students and faculty reported that the PPRT evaluation method effectively measures students' clinical performance, comparable to traditional site visits. Several positive aspects of PPRT were highlighted: the dynamic peer interaction, the evolution of thought processes through three different viewpoints/roles, and students challenging themselves to think out of the box based on each role, along with greater responsibility and independence to complete the patient visit. Limitations and recommendations were discussed.</div></div>","PeriodicalId":101148,"journal":{"name":"Science Talks","volume":"14 ","pages":"Article 100460"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0