{"results":[{"id":"doaj_10.1186/s12954-025-01391-w","title":"Perspectives on hepatitis A and B screening and immunization at a syringe services program: a mixed-methods study","authors":[{"name":"Subul Malik"},{"name":"Marina Plesons"},{"name":"Monica Faraldo"},{"name":"Tyler S. Bartholomew"},{"name":"Hansel E. Tookes"},{"name":"Edward Suarez"},{"name":"David W. Forrest"}],"abstract":"Abstract Background People who inject drugs (PWID) are at increased risk for viral hepatitis, yet hepatitis A virus (HAV) and hepatitis B virus (HBV) screening and immunization rates remain low. Although offering HAV and HBV services at syringe services programs (SSPs) is effective, few U.S. SSPs currently offer them. Limited qualitative research exists on the advantages and optimization of these services at SSPs. This study explored PWID and SSP staff perspectives regarding barriers to HAV and HBV prevention and care services in traditional healthcare, facilitators for SSP-based provision, and opportunities to improve service delivery. Methods This study was conducted at an SSP in Miami, Florida serving over 2500 PWID annually. Quantitative data on vaccine administration from August 2023 to May 2025 were abstracted from the SSP database. Prior to implementation, in May 2022, we conducted in-depth interviews with 15 PWID and 11 SSP staff. Transcripts were analyzed using codebook thematic analysis in Dedoose. Results From August 2023 to May 2025, the SSP administered 114 HAV and 176 HBV vaccine doses. Qualitative interviews from May 2022 revealed several key findings. Barriers included limited knowledge, stigma and discrimination, resource and transportation challenges, navigation difficulties, and limited prioritization. Facilitators for SSP-based services included the benefits of co-located, on-demand care, and non-stigmatizing and supportive environment. Opportunities for improvement included offering incentives, expanding outreach, and increasing communication. Conclusion PWID face significant barriers to HAV and HBV services in traditional healthcare, including stigma, logistical challenges, and limited awareness of viral hepatitis. Integrating these services into SSPs enhanced accessibility and uptake by leveraging trust, convenience, and harm reduction principles.","source":"DOAJ","year":2026,"language":"","subjects":["Public aspects of medicine"],"doi":"10.1186/s12954-025-01391-w","url":"https://doi.org/10.1186/s12954-025-01391-w","is_open_access":true,"published_at":"","score":70},{"id":"doaj_10.3389/fpubh.2025.1717697","title":"Does the targeted poverty alleviation program improve the subjective well-being of poor households? Empirical evidence from China","authors":[{"name":"Dazhe Wang"},{"name":"Xiaolei Yang"}],"abstract":"Enhancing the subjective well-being of poor households is crucial for the world’s sustainable development. Using a comprehensive household-level dataset from the China Household Finance Survey (CHFS) spanning 2011 to 2019, this study employed a multi-period difference-in-differences (DID) approach to systematically identify the causal effect and underlying mechanisms of the Targeted Poverty Alleviation (TPA) program on the subjective well-being of poverty-stricken households. Then it explored the heterogeneous effects of different assistance measures on their subjective well-being. We found that the TPA program significantly improves the subjective well-being of rural poor households after a series of robustness checks. The analysis indicated that the TPA program improves the happiness of poor households by reducing their relative poverty and promoting their labor participation to eliminate poverty. We found that providing basic public services, means of agricultural production, and communication infrastructure all enhance the positive impact of TPA on happiness, while the housing relocation program, transportation infrastructure investment, and agricultural technical support do not. The conclusions of this study have important policy implications for ensuring equitable access to basic public services, consolidating the effective link between poverty alleviation achievements and rural revitalization in the post-poverty era, thereby promoting the common prosperity of rural households.","source":"DOAJ","year":2026,"language":"","subjects":["Public aspects of medicine"],"doi":"10.3389/fpubh.2025.1717697","url":"https://www.frontiersin.org/articles/10.3389/fpubh.2025.1717697/full","is_open_access":true,"published_at":"","score":70},{"id":"doaj_10.1038/s41598-025-15011-x","title":"Vehicular ad hoc networks verification scheme based on bilinear pairings and networks reverse fuzzy extraction","authors":[{"name":"Zaid Ameen Abduljabbar"},{"name":"Vincent Omollo Nyangaresi"},{"name":"Ahmed Ali Ahmed"},{"name":"Junchao Ma"},{"name":"Mustafa A. Al Sibahee"},{"name":"Mohammed Abdulridha Hussain"},{"name":"Zaid Alaa Hussien"},{"name":"Ali Hasan Ali"},{"name":"Abdulla J. Y. Aldarwish"},{"name":"Husam A. Neamah"}],"abstract":"Abstract Vehicular Ad-Hoc Networks (VANETs) have facilitated the massive exchange of real-time traffic and weather conditions, which have helped prevent collisions, reduce accidents, and road congestions. This can effectively enhance driving safety and efficiency in technology-driven transportation systems. However, the transmission of massive and sensitive information across public wireless communication channels exposes the transmitted data to a myriad of privacy as well as security threats. Although past researches has developed many vehicular ad-hoc networks security preservation schemes, several of them are inefficient or susceptible to attacks. This work, introduces an approach that leverages reverse fuzzy extraction, bilinear pairing, and Physically Unclonable Function (PUF) to design an efficient and anonymity-preserving authentication scheme. We conduct an elaborate formal security analysis to demonstrate that the derived session key is secure. The semantic security analyses also demonstrate its resilience against typical VANET attacks such as impersonations, denial of service, and de-synchronization, instilling confidence in its effectiveness. Moreover, our approach incurs the lowest computational overheads at relatively low communication costs. Specifically, our protocol attains a 66.696% reduction in computation costs, and a 70% increment in the supported security functionalities.","source":"DOAJ","year":2025,"language":"","subjects":["Medicine","Science"],"doi":"10.1038/s41598-025-15011-x","url":"https://doi.org/10.1038/s41598-025-15011-x","is_open_access":true,"published_at":"","score":69},{"id":"doaj_10.3390/logistics9030094","title":"Digital Planning Tools in Intermodal Transport: Evidence from Poland","authors":[{"name":"Mateusz Zajac"},{"name":"Tomislav Rožić"},{"name":"Justyna Swieboda-Kutera"},{"name":"Martin Starčević"}],"abstract":"\u003ci\u003eBackground\u003c/i\u003e: The increasing complexity of global supply chains and environmental expectations has highlighted the strategic importance of digital transformation in the transport, forwarding, and logistics (TFL) sector. Despite a growing portfolio of available tools, adoption rates—particularly among small and medium-sized enterprises (SMEs) in Central and Eastern Europe—remain low. This study investigates the barriers and motivations related to the implementation of digital planning tools supporting intermodal transport planning. \u003ci\u003eMethods\u003c/i\u003e: A structured online survey was conducted among 80 Polish TFL enterprises, targeting decision-makers responsible for operational and digital strategies. The questionnaire included 17 closed and semi-open questions grouped into three thematic sections: tool usage, implementation barriers, and digital readiness. \u003ci\u003eResults\u003c/i\u003e: The findings indicate that only 20% of respondents use dedicated route planning tools, and merely 10% report satisfaction with their performance. Key barriers include lack of awareness, organizational inertia, and the prioritization of other initiatives, with financial cost cited less frequently. While environmental sustainability is declared as a priority by most enterprises, digital support for emission tracking is limited. The results highlight the need for targeted education, integration support, and differentiated platform functionalities for SMEs and larger firms. \u003ci\u003eConclusions\u003c/i\u003e: This study offers evidence-based recommendations for developers, policymakers, and logistics managers aiming to accelerate digital adoption in the intermodal logistics landscape.","source":"DOAJ","year":2025,"language":"","subjects":["Transportation and communication","Management. Industrial management","Transportation and communications"],"doi":"10.3390/logistics9030094","url":"https://www.mdpi.com/2305-6290/9/3/94","is_open_access":true,"published_at":"","score":69},{"id":"doaj_10.3390/logistics9010038","title":"Analyzing Airline Fleet Resilience Using the Disruption Funnel Framework","authors":[{"name":"H. A. Elhamy"},{"name":"A. B. Eltawil"}],"abstract":"\u003ci\u003eBackground\u003c/i\u003e: Defining the optimal fleet portfolio is a crucial process in airline planning. The published efforts in literature provide ways to anticipate the disruption effects on the passenger demand; however, the proposed solution in this paper provides visibility on the impact of sustainable disruption and the way an airline can resist it. \u003ci\u003eMethods\u003c/i\u003e: This paper proposes a two-stage methodology to find the best portfolio for airline operational requirements under the impact of disruption. The first stage considers optimization for normal airline operations under a specific fleet portfolio using an Integer Linear Programming (ILP) model. The second stage of the analysis is a mapping for the scenario-based methodology to find a way out for an airline subjected to some given disruption in operations. \u003ci\u003eResults\u003c/i\u003e: The result of the two-stage analysis shall define the best fleet portfolio to withstand sustained disruptions by mapping the results in a disruption funnel and showing the impact of the supply and demand gap on the airline’s sustainable profitability. \u003ci\u003eConclusions\u003c/i\u003e: This paper provides a novel, practical way of evaluating strategic decisions to choose the best fleet portfolio and make airlines rely on the mapping of the disruption funnel to modify their network while increasing supply chain resilience.","source":"DOAJ","year":2025,"language":"","subjects":["Transportation and communication","Management. Industrial management","Transportation and communications"],"doi":"10.3390/logistics9010038","url":"https://www.mdpi.com/2305-6290/9/1/38","is_open_access":true,"published_at":"","score":69},{"id":"doaj_10.3390/s24113433","title":"Design and Evaluation of a Low-Power Wide-Area Network (LPWAN)-Based Emergency Response System for Individuals with Special Needs in Smart Buildings","authors":[{"name":"Habibullah Safi"},{"name":"Ali Imran Jehangiri"},{"name":"Zulfiqar Ahmad"},{"name":"Mohammed Alaa Ala’anzy"},{"name":"Omar Imhemed Alramli"},{"name":"Abdulmohsen Algarni"}],"abstract":"The Internet of Things (IoT) is a growing network of interconnected devices used in transportation, finance, public services, healthcare, smart cities, surveillance, and agriculture. IoT devices are increasingly integrated into mobile assets like trains, cars, and airplanes. Among the IoT components, wearable sensors are expected to reach three billion by 2050, becoming more common in smart environments like buildings, campuses, and healthcare facilities. A notable IoT application is the smart campus for educational purposes. Timely notifications are essential in critical scenarios. IoT devices gather and relay important information in real time to individuals with special needs via mobile applications and connected devices, aiding health-monitoring and decision-making. Ensuring IoT connectivity with end users requires long-range communication, low power consumption, and cost-effectiveness. The LPWAN is a promising technology for meeting these needs, offering a low cost, long range, and minimal power use. Despite their potential, mobile IoT and LPWANs in healthcare, especially for emergency response systems, have not received adequate research attention. Our study evaluated an LPWAN-based emergency response system for visually impaired individuals on the Hazara University campus in Mansehra, Pakistan. Experiments showed that the LPWAN technology is reliable, with 98% reliability, and suitable for implementing emergency response systems in smart campus environments.","source":"DOAJ","year":2024,"language":"","subjects":["Chemical technology"],"doi":"10.3390/s24113433","url":"https://www.mdpi.com/1424-8220/24/11/3433","is_open_access":true,"published_at":"","score":68},{"id":"doaj_10.3390/app14167035","title":"Multiple Learning Strategies and a Modified Dynamic Multiswarm Particle Swarm Optimization Algorithm with a Master Slave Structure","authors":[{"name":"Ligang Cheng"},{"name":"Jie Cao"},{"name":"Wenxian Wang"},{"name":"Linna Cheng"}],"abstract":"It is a challenge for the particle swarm optimization algorithm to effectively control population diversity and select and design efficient learning models. To aid in this process, in this paper, we propose multiple learning strategies and a modified dynamic multiswarm particle swarm optimization with a master slave structure (MLDMS-PSO). First, a dynamic multiswarm strategy with a master–slave structure and a swarm reduction strategy was introduced to dynamically update the subswarm so that the population could maintain better diversity and more exploration abilities in the early stage and achieve better exploitation abilities in the later stage of the evolution. Second, three different particle updating strategies including a modified comprehensive learning (MCL) strategy, a united learning (UL) strategy, and a local dimension learning (LDL) strategy were introduced. The different learning strategies captured different swarm information and the three learning strategies cooperated with each other to obtain more abundant population information to help the particles effectively evolve. Finally, a multiple learning model selection mechanism with reward and punishment factors was designed to manage the three learning strategies so that the particles could select more advantageous evolutionary strategies for different fitness landscapes and improve their evolutionary efficiency. In addition, the results of the comparison between MLDMS-PSO and the other nine excellent PSOs on the CEC2017 test suite showed that MLDMS-PSO achieved an excellent performance on different types of functions, contributing to a higher accuracy and a better performance.","source":"DOAJ","year":2024,"language":"","subjects":["Technology","Engineering (General). Civil engineering (General)","Biology (General)","Physics","Chemistry"],"doi":"10.3390/app14167035","url":"https://www.mdpi.com/2076-3417/14/16/7035","is_open_access":true,"published_at":"","score":68},{"id":"doaj_10.1080/15384047.2023.2221879","title":"CX43 down-regulation promotes cell aggressiveness and 5-fluorouracil-resistance by attenuating cell stiffness in colorectal carcinoma","authors":[{"name":"Yue Han"},{"name":"Haowei Wang"},{"name":"Hui Chen"},{"name":"Tianyuan Tan"},{"name":"Yiqing Wang"},{"name":"Hongjun Yang"},{"name":"Yanqing Ding"},{"name":"Shuang Wang"}],"abstract":"Chemotherapy is one of the most commonly treatments of advanced colorectal cancer (CRC). However, the drug resistant following chemotherapeutic treatment is a significant challenge in the clinical management of CRC. Therefore, understanding the resistance mechanisms and developing new strategies for enhancing the sensitivity are urgently needed to improve CRC outcome. Connexins contribute to the formation of gap junctions among neighboring cells and then advance gap junctional intercellular communication (GJIC) for transportation of ions and small molecules. Although the drug resistance resulted from GJIC dysfunctional by aberrant expression of connexins is relatively well understood, the underlying mechanisms of mechanical stiffness mediated by connexin responsible for chemoresistance are largely unknown in CRC. Here, we demonstrated that connexin 43 (CX43) expression was downregulated in CRC and that loss of CX43 expression was positively correlated with metastasis and poor prognosis of CRC patients. The CX43 overexpressing suppressed CRC progression and increased the sensitivity to 5-fluorouracil (5-FU) via enhanced GJIC in vitro and in vivo. Moreover, we also highlight that the downregulation of CX43 in CRC increases the stemness of cells via reducing the cell stiffness, thus promoting the drug resistance. Our results further suggest that both effects, that is changes in the mechanical stiffness of the cell and GJIC mediated by CX43 deregulated, are closely related to drug resistance in CRC, which indicating CX43 as a target against cancer growth and chemoresistance in CRC.","source":"DOAJ","year":2023,"language":"","subjects":["Neoplasms. Tumors. Oncology. Including cancer and carcinogens"],"doi":"10.1080/15384047.2023.2221879","url":"http://dx.doi.org/10.1080/15384047.2023.2221879","pdf_url":"http://dx.doi.org/10.1080/15384047.2023.2221879","is_open_access":true,"published_at":"","score":67},{"id":"doaj_10.2478/ttj-2023-0020","title":"Traffic Monitoring System for Vehicle Detection in Day and Night Conditions","authors":[{"name":"Slimani Ibtissam"},{"name":"Zaarane Abdelmoghit"},{"name":"Atouf Issam"}],"abstract":"In this work, a day and night time vehicle detection system for traffic surveillance is proposed. Our system is composed of two main processes, day time and night time processes. In the night time, the vehicles are detected based on their taillights and headlights. First of all, the 2D-DWT (Two Dimensional Discrete Wavelet Transform) and the background subtraction are applied to the input image. Then, the connected component technique is used to extract the region of interest. If it is the daytime, the connected component candidates are taken as potential vehicles after applying a pre-processing algorithm to improve the result. If it is the night-time, a filtering operation is used to keep only the bright white and red connected component candidates (which represent potential headlights and taillights, respectively). Finally, potential lamp sets are formed by grouping the extracted components on the basis of their positions, sizes, and colours. The potential extracted vehicles are classified as a vehicle or non-vehicle by using a pre-trained CNN (Convolutional Neural Network) classifier. The proposed system was tested and evaluated using different works from the literature. The experiments show that our proposed system has reached a high accuracy in terms of vehicle detection process whether in day or night time. The experiments were performed using four different videos and were implemented using the C++ language, which facilitates mathematical computation, and its OpenCV library, which is used to run the image processing algorithms used, as well as the TensorFlow library, which facilitates transfer learning of pre-trained CNN models.","source":"DOAJ","year":2023,"language":"","subjects":["Transportation and communication"],"doi":"10.2478/ttj-2023-0020","url":"https://doi.org/10.2478/ttj-2023-0020","is_open_access":true,"published_at":"","score":67},{"id":"doaj_10.1049/cmu2.12344","title":"Identification and evaluation of the effective criteria for detection of congestion in a smart city","authors":[{"name":"Anita Mohanty"},{"name":"Subrat Kumar Mohanty"},{"name":"Bhagyalaxmi Jena"},{"name":"Ambarish G. Mohapatra"},{"name":"Ahmed N. Rashid"},{"name":"Ashish Khanna"},{"name":"Deepak Gupta"}],"abstract":"Abstract The delay in transportation of necessary items is due to traffic congestion throughout the world. This is a serious phenomenon which results in waste of time and fuel. The detection of road conditions and dissemination of traffic information efficiently and effectively is a big challenge to authorities. Recently, the technologies of vehicular ad hoc networks (VANETs) have been utilized and become an important part of the intelligent transportation system (ITS). For this existing problem, vehicle‐to‐vehicle (V2V) communication provides a means for cooperation and route management in transport networks. This paper proposed a novel congestion detection system based on the combination of k‐means clustering and analytical hierarchy process. In the simulation of urban mobility (SUMO) simulator, a transport network is created and parameters of vehicles facing congestion are taken to extract the key parameter by using the k‐means clustering technique and mathematical mean algorithm. This parameter is utilized in analytical hierarchy process to detect the highest priorities parameter and based on that the congestion is detected in particular lane. The result can be a better technique for congestion detection as it requires low installation cost and can be incorporate in vehicles for congestion avoidance which will alternatively improve the traffic flow.","source":"DOAJ","year":2022,"language":"","subjects":["Telecommunication"],"doi":"10.1049/cmu2.12344","url":"https://doi.org/10.1049/cmu2.12344","is_open_access":true,"published_at":"","score":66},{"id":"doaj_10.3390/logistics6020028","title":"Impact of Additive Manufacturing on the Supply Chain of Aerospace Spare Parts Industry—A Review","authors":[{"name":"Binoy Debnath"},{"name":"Md Shihab Shakur"},{"name":"Fahmida Tanjum"},{"name":"M. Azizur Rahman"},{"name":"Ziaul Haq Adnan"}],"abstract":"\u003ci\u003eBackground:\u003c/i\u003e Additive manufacturing (AM) applications in producing spare parts are increasing day by day. AM is bridging the digital and physical world as a 3D computer-aided manufacturing (CAM) method. The usage of AM has made the supply chain of the aviation spare parts industry simpler, more effective, and efficient. \u003ci\u003eMethods:\u003c/i\u003e This paper demonstrates the impacts of AM on the supply chain of the aircraft spare parts industry following a systematic literature review. Hence, centralized and decentralized structures of AM supply chains have been evaluated. Additionally, the attention has been oriented towards the supply chain with AM technologies and industry 4.0, which can support maintenance tasks and the production of spare parts in the aerospace industry. \u003ci\u003eResults:\u003c/i\u003e This review article summarizes the interconnection of the industry findings on spare parts. It evaluates the potentiality and capability of AM in conceptualizing the overall supply chain. Moreover, MROs can adopt the proposed framework technologies to assist decision-makers in deciding whether the logistics hub with AM facilities is centralized or decentralized. \u003ci\u003eConclusions:\u003c/i\u003e Finally, this review provides an overall view to make critical decisions on the supply chain design of spare parts driven by new and disruptive technologies of industry 4.0. The next-generation supply chain may replace the logistics barriers by reducing waste and improving capability and sustainability by implementing AM technologies.","source":"DOAJ","year":2022,"language":"","subjects":["Transportation and communication","Management. Industrial management","Transportation and communications"],"doi":"10.3390/logistics6020028","url":"https://www.mdpi.com/2305-6290/6/2/28","is_open_access":true,"published_at":"","score":66},{"id":"doaj_Knowledge%2C+Attitude%2C+and+Perceived+Risks+Towards+COVID-19+Pandemic+and+the+Impact+of+Risk+Communication+Messages+on+Healthcare+Workers+in+Saudi+Arabia","title":"Knowledge, Attitude, and Perceived Risks Towards COVID-19 Pandemic and the Impact of Risk Communication Messages on Healthcare Workers in Saudi Arabia","authors":[{"name":"Mushi A"},{"name":"Yassin Y"},{"name":"Khan A"},{"name":"Yezli S"},{"name":"Almuzaini Y"}],"abstract":"Abdulaziz Mushi,1 Yara Yassin,1 Anas Khan,1,2 Saber Yezli,1 Yasir Almuzaini1 1The Global Centre for Mass Gatherings Medicine, Ministry of Health, Riyadh, Saudi Arabia; 2Department of Emergency Medicine, College of Medicine, King Saud University, Riyadh, Saudi ArabiaCorrespondence: Abdulaziz MushiPublic Health Directorate, Global Centre for Mass Gatherings Medicine, Ministry of Health, Riyadh, Saudi ArabiaTel +966506830492Email abhmashi@moh.gov.saPurpose: To investigate knowledge, attitude, and perceived risks towards COVID-19 pandemic among healthcare workers (HCWs) in Saudi Arabia. Besides, the impact of risk communication strategy on the attitude and practice of HCWs was investigated.Patients and Methods: We conducted a cross-sectional study that targeted HCWs from various Saudi health facilities. We utilized a self-administrated, online-based questionnaire designed to assess basic knowledge of COVID-19, attitude and disease perception, and the impact of risk communication messages among HCWs.Results: A total of 1691 responses were received in the study. The HCWs exhibited good levels of knowledge (total maximum score is 1) of COVID-19 concerning the modes of transportation of COVID-19 (0.82± 0.16), sample collection method for COVID-19 diagnosis (0.98± 0.08), transmission of infection from asymptomatic individuals (0.99± 0.11), and that antibiotics are not effective against the new COVID-19 (0.83± 0.38). Nearly one-third of the participants considered a high/very high possibility of acquiring COVID-19 infection. HCWs had good attitude scores concerning their willingness to deal with new COVID-19 patients (0.87± 0.33) and their beliefs in being educated on COVID-19 (0.99± 0.11). Almost all participants strongly agree/agree that it is important to take action to prevent the spread of COVID-19 within healthcare facilities and received health information messages. Notably, 93.4% of the participants stated that the received messages changed their attitude towards COVID-19 and its preventive measures. Good knowledge scores were significantly associated with age \u003e 49 years old, higher educational level, and physician occupation. Similarly, good attitude scores were higher among males, HCWs aged 40– 49 years old, non-Saudi nationals, and physician and nurse occupations.Conclusion: HCWs have fair knowledge and attitude towards the COVID-19 pandemic. The risk communication is an effective strategy to improve the attitude and practice of HCWs towards COVID-19 in Saudi Arabia.Keywords: COVID-19 pandemic, knowledge, attitude, risk communication, perceived benefits, Saudi Arabia","source":"DOAJ","year":2021,"language":"","subjects":["Public aspects of medicine"],"url":"https://www.dovepress.com/knowledge-attitude-and-perceived-risks-towards-covid-19-pandemic-and-t-peer-reviewed-fulltext-article-RMHP","is_open_access":true,"published_at":"","score":65},{"id":"doaj_10.22146/jik.v15i1.1515","title":"Tourist Assessment of Tourist Destination Components: Attraction, Amenities, Accessibility, and Ancillary Service in Tourism Object of Liwa Botanical Garden","authors":[{"name":"Machya K. Tsani"},{"name":"Sugeng P. Harianto"},{"name":"Trio  Santoso"},{"name":"Niskan W.  Masruri"},{"name":"Gunardi D.  Winarno"}],"abstract":"The development of a tourist attraction must pay attention to the tourists’necessity. To fulfill these needs there are 4 main components that must be fulfilled. This study aims to determine the assessment of tourists to the 4 main components (attraction, amenities, accessibility, and ancillary service) on the natural attractions of the Liwa Botanical Garden. This research was carried out in the Liwa Botanical Garden located in Kubu Perahu Village, Balik Bukit District, Liwa City, West Lampung Regency. Data was collected for 100 tourists by accidental sampling. Data analysis using a likert scale and data scoring. The results showed that of the 4 components of tourist destinations in the KRL object, only the attraction component had adequate value. The three other components (accessibility, safety and ancillary services) are in the sufficient category so that it would be better if there were improvements to the indicators of the 3 other variables such as: addition of public transportation, control of parking areas, addition of food stalls, procurement of lodging for public, improvement of central services information, the addition of public toilets, provided a special place to buy souvenirs, giving pictures of the types of rubbish in the trash, and need to add a communication network spot so that tourists feel more comfortable and enjoy their visit.","source":"DOAJ","year":2021,"language":"","subjects":["Forestry"],"doi":"10.22146/jik.v15i1.1515","url":"https://jurnal.ugm.ac.id/v3/jik/article/view/1515","is_open_access":true,"published_at":"","score":65},{"id":"doaj_10.1109/ACCESS.2020.3037635","title":"IEEE Access Special Section Editorial: 5G and Beyond Mobile Wireless Communications Enabling Intelligent Mobility","authors":[{"name":"Ke Guan"},{"name":"Markus Rupp"},{"name":"Thomas Kurner"},{"name":"Cesar Briso"},{"name":"David W. Matolak"},{"name":"Jun-Ichi Takada"},{"name":"Wei Wang"}],"abstract":"Increasing urbanization is one major trend that shapes tomorrow\u0026#x2019;s society; by 2050, more than 85\u0026#x0025; of the developed world\u0026#x2019;s population will live in a comparatively small number of ever-growing cities. Within such cities and their commuter belts, reliable high-rate wireless communication will not only be required for (quasi-) static users but also for hosts of people moving in public and private transportation networks. Yet, wireless connectivity is not restricted to people; frictionless functioning of such a society in motion is supported by Intelligent Mobility, where each connected transportation vehicle (car, train, bus, ship, aircraft, motorcycle, and bicycle) is expected to be a smart object equipped with a powerful multi-sensor platform, communication capability, computing units, and Internet protocol (IP)-based connectivity, such as to be highly efficient in various vehicular and transportation applications. This vision requires a more pervasive and ubiquitous communications and networking core, which will not be only driven by the existing research on 5G but also enabled by future mobile wireless communications that employ new concepts, such as data analytics, artificial intelligence, machine learning, and cloud computing. Therefore, this IEEE Access Special Section focuses on various theoretical and experimental views on researching and developing the required technological enhancements of 5G and beyond mobile wireless communications, to efficiently support the vision of intelligent mobility, providing mobility as a service, and enabling dependable Internet services. Twenty-three high-quality contributions to this Special Section have been selected in a strict peer-review process supported by reputed international experts.","source":"DOAJ","year":2020,"language":"","subjects":["Electrical engineering. Electronics. Nuclear engineering"],"doi":"10.1109/ACCESS.2020.3037635","url":"https://ieeexplore.ieee.org/document/9274542/","is_open_access":true,"published_at":"","score":64},{"id":"doaj_Constrained+Controller+Design+for+Real-time+Delay+Recovery+in+Metro+Systems","title":"Constrained Controller Design for Real-time Delay Recovery in Metro Systems","authors":[{"name":"Sima Najafi"},{"name":"Bijan Moaveni"}],"abstract":"This study is concerned with the real-time delay recovery problem in metro loop lines. Metro is the backbone of public transportation system in large cities. A discrete event model for traffic system of metro loop lines is derived and presented. Two effective automatic controllers, linear quadratic regulator (LQR) and model predictive controller (MPC), are used to recover train delays. A newly-designed real-time algorithms for constrained LQR and constrained MPC in the presence of operational constraint on control actions is introduced. MPC and LQR automatic controllers are compared for traffic regulation in metro loop lines. To facilitate fair comparison of the performance of the automatic controllers, different scenarios are considered. The results are then compared to determine the relative effectiveness of the controllers.","source":"DOAJ","year":2017,"language":"","subjects":["Transportation and communication"],"url":"http://ijrare.iust.ac.ir/article-1-171-en.pdf","pdf_url":"http://ijrare.iust.ac.ir/article-1-171-en.pdf","is_open_access":true,"published_at":"","score":61},{"id":"doaj_10.2478/ttj-2014-0029","title":"Oil Pollution in the Southeastern Baltic Sea in 2009-2011","authors":[{"name":"Lavrova O. Yu."},{"name":"Mityagina M.I."},{"name":"Kostianoy A.G."},{"name":"Semenov A.V."}],"abstract":"From January 2009 to April 2012 a satellite survey of the central and southeastern parts of the Baltic Sea was carried out by the Space Radar Laboratory at the Space Research Institute of Russian Academy of Sciences (RAS). The main attention was focused on the detection of oil pollution as well as biogenic and anthropogenic surfactant films. The basic data are high resolution radar images obtained by advanced synthetic aperture radar (ASAR) on board of the Envisat satellite of the European Space Agency. Remotely sensed data in visual and infrared (IR) bands acquired by sensors MERIS Envisat, MODIS-Terra and -Aqua, and AVHRR NOAA nearly simultaneously with the ASAR images, were processed and analysed in order to facilitate the discrimination between different types of surface pollutants, to understand a comprehensive features of meteorological and hydrodynamic processes in the sea area of investigation, and to reveal factors determining pollutants spread and drift. The regions of the most intense oil pollution are outlined.","source":"DOAJ","year":2014,"language":"","subjects":["Transportation and communication"],"doi":"10.2478/ttj-2014-0029","url":"https://doi.org/10.2478/ttj-2014-0029","is_open_access":true,"published_at":"","score":58},{"id":"doaj_10.15294/jejak.v7i2.3891","title":"CHARACTERISTICS OF INDONESIAN HOUSEHOLD’S LIVING EXPENDITURE","authors":[{"name":"Duddy Roesmara Donna"}],"abstract":"\u003cp\u003eThe aim of this study is to estimate and analize the characteristics of Indonesian household expenditure on goods and services, for example food, clothes, household utensils, housing, medical care, education, oil and transportation, gas, electricity and communication. Linear Expenditure System (LES) model and seemingly uncorrelated regression (SUR) estimation method were applied. This study has some conclusions. First, if ones have more incomes, they will proportionally allocate them for housing, oil and transportation, education, food, and medical care. Second, medical care, education and communication are categorized as superior or deluxe commodities. Third, the approximation of minimum living expenditure to survive is Rp 147.236 for a household per week.\u003c/p\u003e\u003cp\u003e \u003c/p\u003e\u003cp\u003e \u003c/p\u003e","source":"DOAJ","year":2014,"language":"","subjects":["Economic growth, development, planning"],"doi":"10.15294/jejak.v7i2.3891","url":"http://journal.unnes.ac.id/nju/index.php/jejak/article/view/3891","is_open_access":true,"published_at":"","score":58},{"id":"doaj_10.1155/2013/639325","title":"Hybrid MAC Scheme for Vehicular Communications","authors":[{"name":"Woong Cho"}],"abstract":"Vehicular communications have been creating new applications in intelligent transportation systems (ITS) areas by converging information and communication technology (ICT) with automobile and road industries. In this paper, we introduce hybrid MAC scheme for vehicular communications which enhances the performance of IEEE 802.11p based communication system. The proposed MAC scheme supports high throughput by combining carrier sensing multiple access/collision avoidance (CSMA/CA) with TDMA. The benefits of proposed schemes are verified by simulations. In addition, we discuss some implementation issues including several application scenarios.","source":"DOAJ","year":2013,"language":"","subjects":["Electronic computers. Computer science"],"doi":"10.1155/2013/639325","url":"https://doi.org/10.1155/2013/639325","is_open_access":true,"published_at":"","score":57},{"id":"doaj_10.3846/tede.2010.40","title":"Development of architecture of embedded decision support systems for risk evaluation of transportation of dangerous goods / Sprendimų paramos sistemos įterptinės architektūros plėtotė pavojingųjų krovinių transportavimo rizikai vertinti","authors":[{"name":"Dalė Dzemydienė"},{"name":"Ramūnas Dzindzalieta"}],"abstract":"The analysis of the risk of transportation processes shows that transportation of hazardous materials is complex process and causes a risk quite a different than that of a fixed facility. Sustainability of surroundings depends on a safe transportation, especially on the safe transportation of dangerous goods by different auto transport kinds. The aims of our research concern an approach for development of the architecture of decision support system with integrated embedded components for monitoring and evaluation of transportation processes of dangerous goods. Mobile technology provides a potentially convenient and truly ubiquitous platform for detection of the objects and the contextual information such as the location, region awareness, etc. A location based reminder application runs on wireless equipments. Reminders can be more helpful when rich contextual information is used to present necessary information at appropriate time moments in appropriate places. Devices sense and interact with their physical environment through sensors. In general terms, any aspect of the device that enables it to sense and interact with its physical environment may be considered as a sensor. The combination of web service protocols (e.g. SOAP) with session initialization protocol (SIP) enables P2P accessibility by introducing sensor's listener and context retriever as programming components in the developing communication architecture of servers and users. We are using an appropriate interface structure (components, scenarios) for service control, and integrate data‐mining, knowledge‐based techniques for recognizing a concrete situation of the moving object. The integration of distributed information systems and the means of wireless communication systems (i.e., programming components, protocols, sensors, and devices) are needed. The paper describes an approach of designing the architecture of the system that uses wireless technologies for monitoring dynamic objects with implementation of probabilistic methods for evaluation of risk of possible types of scenarios of accident events which can occur in transportation of dangerous goods. Some wireless protocols are used in establishing the object's geographical coordinates, monitoring and fixing the state behavior of the moving dangerous transportation objects.\n\r\n\nSantrauka\n\r\n\nTransporto srautų ir avarijų keliuose daugėjimas verčia nagrinėti pavojingųjų krovinių transportavimo problemą sisteminiu – daugiakompleksiniu požiūriu, nustatant galimos rizikos sritis ir pasiūlant operatyvaus valdymo metodus. Transportuojant krovinius, vežančius pavojingas, taršias medžiagas, išauga aplinkos taršos rizika, susijusi su judančių transporto objektų įvykiu pasireiškimo tikimybiniu padidėjimu ir atitinkamu pasekmių galimybėmis. Tikėtinos taršos rizika įgyja daugiafunkci pobūdį ir yra sudėtingesne nei rizikos vertinimas stacionarių objektų aplinkoje. Darnios aplinkos vystymo reikalavimai verčia užtikrinti saugius transportavimo procesus ir ypač saugu pavojingųjų kroviniu transportavimą skirtingose autotransporto priemonėse ir teritorijose. Todėl gana svarbu sukurti tinkamą sprendimus palaikančią aplinką, kuri padėtų stebėti ir operatyviai vertinti transporto objektus, vežamų cheminių medžiagų būkle, kelio ruožų avaringumą. Ypatinga reikšmę įgyja transportavimo kelyje išsidėstančių teritorijų statusas ir padėtis. Šiam tikslui tenka ieškoti metodų, tinkamų vertinti pavojingųjų krovinių transportavimo procesus ir juos aprašyti sprendimų paramos sistemoje (SPS). Mobiliosios technologijos padeda nustatyti objekto būvimo vietos informaciją, leisti sieti ją su vietovės informacija, taikyti atitinkamus jutiklių rodmenis. Vietovės nustatymas grindžiamas priminimų paslauga ir veikia belaidžiuose įrenginiuose. Priminimai gali būti naudingi, kai kontekstinė informacija pateikiama tinkamu metu ir tinkamoje vietoje. Prietaisų jutikliai sąveikauja su fizine aplinka per sensorius. Straipsnyje siūlomi sprendimai, kaip projektuoti atitinkamas sąsajos struktūras – sprendimų paramos sistemų įterptinius komponentus, scenarijus, vykdymo paslaugų kontrolė judančio objekto konkrečiai situacijai atpažinti ir valdyti. Įmontuotoje SPS taikomi išskirstytųjų informacinių sistemų ir belaidžio ryšio sistemų sąveikos komponentai, t. y. programavimo moduliai, protokolai, sensorinių duomenų analizė. Straipsnyje aprašomas SPS projektavimo procesas, pasitelkiant belaides technologijas dinaminiams objektams stebėti, susijusiems su pavojingųjų krovinių transportavimu. Siūloma taikyti bevielio ryšio protokolus nustatant geografines objekto koordinates, pateikiant įspėjimus apie judančio pavojingojo transporto būsena ir galimu prognozių rezultatus panaudoti operatyviam objekto valdymui.\n\r\n\nFirst published online: 10 Feb 2011\n\r\n\nReikšminiai žodžiai: sprendimu paramos sistema, įterptinė komponentinė sistemos architektūra, rizikos vertinimas, darnus vystymas, pavojingųjų krovinių transportavimas, belaidės technologijos","source":"DOAJ","year":2010,"language":"","subjects":["Economic growth, development, planning","Business"],"doi":"10.3846/tede.2010.40","url":"https://journals.vgtu.lt/index.php/TEDE/article/view/5910","is_open_access":true,"published_at":"","score":54},{"id":"doaj_An%C3%A1lisis+y+soluci%C3%B3n+de+aver%C3%ADa+del+acoplamiento+del+sinf%C3%ADn+de+fondo+de+la+Ba%C3%B1era+de+una+Planta+de+Pl%C3%A1stico+Mixto.+%2F%2F+Analysis+and+solution+of+the+coupling+failure+of+the+bottom+worm+conveyor+of+the+bathtub+in+a+Mixed+Plastic+Plant.","title":"Análisis y solución de avería del acoplamiento del sinfín de fondo de la Bañera de una Planta de Plástico Mixto. // Analysis and solution of the coupling failure of the bottom worm conveyor of the bathtub in a Mixed Plastic Plant.","authors":[{"name":"R. Goytisolo Espinosa"},{"name":"J. G. Noa Águila"},{"name":"A. Fernández Cañizares"}],"abstract":"\u003cp\u003eEn el trabajo se realizó una investigación para esclarecer las causas de la avería del acoplamiento del sinfín de fondo de la\u003cbr /\u003ebañera de una planta de plástico mixto. En la misma se concluyó que las causas fundamentales de las obstrucciones del\u003cbr /\u003esinfín de fondo son el hecho de que el sinfín de elevación de la bañera tiene una capacidad cuatro veces menor que el sinfín\u003cbr /\u003ede fondo, lo que provoca que el material se acumule en el fondo de la bañera y por otro lado la comunicación entre el sinfín\u003cbr /\u003ede fondo y el de elevación se produce a través de un tubo vertical de capacidad reducida, que constituye también un cuello\u003cbr /\u003ede botella. Se modificó la relación de transmisión de la cadena del accionamiento del sinfín de elevación para elevar su\u003cbr /\u003evelocidad e igualar la capacidad de transportación de ambos sinfines y se eliminó el tubo de conexión entre los mismos. El\u003cbr /\u003eacoplamiento se fabricó de plástico poliamídico, lográndose una adecuada resistencia.\u003c/p\u003e\u003cp\u003e\u003cbr /\u003ePalabras claves: Bañera de plástico, transportadores sinfín, acoplamiento dentado.\u003c/p\u003e\u003cp\u003e___________________________________________________________________________\u003c/p\u003e\u003cp\u003eAbstract.\u003cbr /\u003eIn this paper is shown the investigation carried out in order to clarify the failure causes of the coupling of the bottom worm\u003cbr /\u003econveyor of the bathtub in a Mixed Plastic Plant. In the same was it was concluded that the fundamental causes of the\u003cbr /\u003eobstructions of the bottom conveyor are the fact that the elevator worm conveyor of the bathtub has a capacity four times\u003cbr /\u003eminor that the bottom conveyor, which causes that the material accumulates in the bottom of the bathtub, and on the other\u003cbr /\u003ehand the communication between the bottom conveyor and the elevator one takes place through a vertical tube of reduced\u003cbr /\u003ecapacity that also constitutes a bottle neck. The transmission relationship of the chain of the elevator working conveyor was\u003cbr /\u003emodified in order to elevate their speed and to equal the capacity of transportation of both conveyors, and the connection\u003cbr /\u003etube was eliminated. The coupling was manufactured of polyimide, being achieved an appropriate resistance.\u003c/p\u003e\u003cp\u003e\u003cbr /\u003eKey words: Bathtub of plastic, worm conveyor, jagged coupling.\u003c/p\u003e","source":"DOAJ","year":2004,"language":"","subjects":["Mechanical engineering and machinery"],"url":"http://www.ingenieriamecanica.cujae.edu.cu/index.php/revistaim/article/view/235","is_open_access":true,"published_at":"","score":50}],"total":1602715,"page":1,"page_size":20,"sources":["DOAJ","CrossRef"],"query":"Transportation and communication"}