جستجوی استاد راهنمای دانشگاهی

Andrea Arpaci-Dusseau is the Susan Beth Horwitz WARF Professor of Computer Sciences and Catherine A. Erickson Professor in the School of Computer, Data & Information Sciences at the University of Wisconsin-Madison. She has been a professor at UW-Madison since January 2000 and currently serves as Graduate Advising Chair for the Computer Sciences Department. Her research focuses on computer systems with primary emphasis on file and storage systems, but also making significant contributions in distributed systems, virtualization, and scheduling. According to csrankings.org, she has published the fourth-most papers in premier systems conferences (SOSP and OSDI) and the most at the top file and storage conference (FAST). Professor Arpaci-Dusseau's recent publications demonstrate continued leadership in storage systems research, with increasing focus on cloud architectures, persistent memory technologies, and system reliability. Her work bridges theoretical foundations with practical implementations, consistently addressing real-world challenges in modern computing environments. ACM SIGOPS Mark Weiser Award 2018 (highest honor in systems field) UW-Madison Van Hise Outreach Teaching Award 2017 Multiple Best Paper awards at FAST, SOSP, OSDI, and EuroSys conferences Carolyn Rosner Award for Excellence in Teaching (2010, 2017) Co-chaired major conferences including USENIX ATC '04, FAST '07, OSDI'18, and SOSP'24 Professor Arpaci-Dusseau has co-advised 28 Ph.D. students and is deeply committed to educational outreach through the CaTaPuLT project, which connects UW-Madison students with K-12 schools to teach computational thinking using Scratch. This initiative has reached hundreds of students across Madison and earned her significant recognition for teaching excellence. She leads the Arpaci-Dusseau Systems Lab (ADSL) and is involved with the Wisconsin Institute on Software-defined Datacenters in Madison (WISDoM), where her research group continues to advance state-of-the-art solutions in computer systems.

• File and Storage systems
• Operating systems
• Distributed systems
• +۱ مورد دیگر

Daniel Epstein is an Associate Professor in the Department of Informatics at the University of California, Irvine (UCI), where he leads the Personal Informatics Everyday (PIE) Lab. He holds a courtesy appointment in the Department of Computer Science and is affiliated with the Connected Learning Lab, Institute for Future Health, and Accessibility Research Collective. Epstein earned his Ph.D. in Computer Science & Engineering from the University of Washington and a B.S. in Computer Science from the University of Virginia. His research focuses on how personal tracking technology can better serve diverse users' needs, emphasizing ethical design, health equity, and long-term user engagement. Notable areas include pregnancy tracking, wearable technology for children and ADHD management, and AI-driven health chatbots. Epstein has received grants from NSF, Snap Inc., and UCI programs, totaling over $650k in funding. Epstein's work bridges HCI and health informatics, with over 60 peer-reviewed publications. He advises six Ph.D. students and has mentored numerous undergraduates. Awards include the ACM Senior Member distinction (2025), CHI Best Paper (2023), and NSF CAREER Award (2023). Professional service includes program committees for CHI, CSCW, and UbiComp, plus leadership roles in workshops like the Workgroup on Interactive Systems in Healthcare (WISH). Beyond academia, Epstein enjoys hiking, collecting turtle figures, and advocating for accessible technology.

• Human-Computer Interaction
• Ubiquitous Computing
• Social Computing
• +۶ مورد دیگر

Catherine Lai is a Reader (~Associate Professor) in the Department of Linguistics and English Language at the University of Edinburgh, with strong affiliations to the Centre for Speech Technology Research (CSTR) and the Institute for Language, Cognition and Computation (ILCC) in the School of Informatics. She is based in the School of Philosophy, Psychology and Language Sciences and is actively involved in research, teaching, and academic service. Department: Department of Linguistics and English Language School: School of Philosophy, Psychology and Language Sciences Research Institutes: Centre for Speech Technology Research, Institute for Language, Cognition and Computation Email: C.Lai@ed.ac.uk Her research centers on the role of prosody—non-lexical aspects of speech—in spoken communication. She investigates how prosody contributes to discourse structure, information structure, and affect in dialogue, using interdisciplinary methods from linguistics and machine learning. Her work bridges theoretical linguistics and practical speech technology, aiming to improve spoken language understanding and synthesis systems. She is particularly interested in how prosody shapes listener expectations and how affect and topic are expressed and perceived in conversation. Her recent publications reflect a strong focus on self-supervised learning in speech models, emotion recognition, ASR error correction using large language models, cognitive state classification, and ethical considerations in language technology. She explores topics such as the uncanny valley in synthetic speech, gender expression through voice, and community-centered development of language technologies. Prize from Scopus Profile Catherine Lai has supervised several PhD students, including Leimin Tian and Yuanchao Li, and has been involved in significant research projects, such as a Toyota-funded initiative on spoken dialogue for robot companions. She has secured multiple grants and leads a research agenda that integrates theoretical inquiry with real-world applications in assistive technologies and social science. Her academic service includes organizing major conferences like Interspeech and UK and Ireland Speech. She is a key member of research teams at CSTR and ILCC, collaborating across disciplines to advance the understanding of spoken communication and the development of robust, ethical speech technologies.

• Speech and Language Processing
• Computational Linguistics
• Prosody
• +۱۷ مورد دیگر

Ceren Budak is an Associate Professor at the University of Michigan School of Information and holds a joint appointment as Associate Professor of Electrical Engineering and Computer Science in the College of Engineering. Her work bridges computer science, statistics, and social sciences through computational social science approaches. Her educational background includes a PhD in Computer Science from the University of California, Santa Barbara (2012) and a Bachelors degree in Computer Science from Bilkent University in Turkey (2007). Prior to joining the University of Michigan faculty, she was a Postdoctoral Researcher at Microsoft Research New York. Professor Budak's research centers on computational social science, with particular emphasis on analyzing large-scale datasets to address questions with social, political, and policy implications. Her work spans several interconnected domains: News Media Production & Consumption (examining bias in news outlets and reader preferences), Social Movements & Media (using social media data to study collective action), Social Networks (understanding information diffusion processes), and Measuring and Promoting the Quality of Online Discussions (developing tools to improve online conversations). She teaches SI 608 (Networks) and SI 618 (Data Manipulation and Analysis) at the School of Information. Her publication record demonstrates consistent contributions to understanding how online information ecosystems operate, with recent work focusing on AI-human collaboration, misinformation dynamics, social movement framing, and the application of computational methods to political communication. Her research shows a clear trajectory from foundational work on social network diffusion to increasingly sophisticated analyses of contemporary information challenges. Among her service activities, she has served as Registration chair for COSN (ACM Conference on Online Social Networks) 2015 and as Program Committee Member for numerous prestigious conferences including WWW, ICWSM, WebSci, AAAI, and others. She has also been involved in organizing the MSR NYC Data Science Seminar Series and instructing the Microsoft Research Data Science Summer School.

• Computational Social Science
• Social Media Analysis
• News Media Production and Consumption
• +۷ مورد دیگر

Johan Gustav Bellika is a Professor at the Department of Clinical Medicine, UiT The Arctic University of Norway, based in Tromsø. His work bridges clinical medicine with health informatics, focusing on practical applications that improve healthcare delivery and patient outcomes. Current Position: Professor, Department of Clinical Medicine Institution: UiT The Arctic University of Norway Location: Tromsø, Norway Contact: johan.gustav.bellika@uit.no Professor Bellika's research spans several critical areas in modern healthcare. His primary focus is on health informatics with particular emphasis on medical data privacy, electronic health records, and the application of artificial intelligence in clinical settings. He has made significant contributions to understanding chronic pain management through technology, primary care research networks, and patient-centered care models. His work often involves large population studies such as the Tromsø Study, examining how digital health tools impact healthcare utilization and patient outcomes. His research demonstrates a consistent thread connecting technological innovation with practical clinical applications. Bellika has been instrumental in developing privacy-preserving architectures for healthcare data analysis, which enable researchers to gain insights from sensitive health information without compromising patient privacy. His work on federated learning frameworks represents cutting-edge approaches to analyzing medical data while maintaining strict privacy controls. Health Informatics and Medical Data Privacy Chronic Pain Management through Technology Primary Care Research Networks (PraksisNett) Electronic Health Records and Clinical Decision Support Patient-Centered Digital Health Solutions Federated Learning Applications in Healthcare Professor Bellika's publication record shows a strong trend toward interdisciplinary research that combines clinical medicine, computer science, and public health. His recent work increasingly focuses on the intersection of artificial intelligence and healthcare, particularly how machine learning can be applied to chronic conditions while maintaining rigorous privacy standards. The geographical scope of his research extends across Norway with particular emphasis on Northern Norwegian populations, providing valuable insights into healthcare delivery in Arctic and remote regions. His collaborative approach is evident through numerous co-authored publications with researchers across multiple institutions and disciplines. While specific awards aren't detailed in the available information, his extensive publication record in reputable journals suggests recognition within his field. Professor Bellika has been actively involved in several major research initiatives including the Tromsø Study and PraksisNett, Norway's nationwide practice-based research network. His work on privacy-preserving architectures for healthcare data has significant implications for how medical research can be conducted while respecting patient confidentiality. He appears to be particularly focused on translating research findings into practical tools for clinicians, as evidenced by his work on audit and feedback systems for antibiotic prescribing.

• Health Informatics
• Medical Data Privacy
• Electronic Health Records
• +۴ مورد دیگر

Cecilie Schou Andreassen is a Professor at the Department of Clinical Psychology, University of Bergen . She specializes in behavioral addictions , including workaholism, social media addiction, and substance use interactions. Email: cecilie.andreassen@uib.no Visitor Address: Alrek Health Cluster, Årstadveien 17, 5009 Bergen Research Focus: Andreassen's work examines the psychosocial antecedents of addictive behaviors, with emphasis on personality traits , workplace dynamics , and digital platform interactions . Her research spans cross-cultural validation studies and longitudinal health outcomes related to technology and substance misuse. Article Trends (2017-2022): Analyzing 15 recent publications reveals a consistent focus on addiction scale validation , social media epidemiology , and workaholism's health impacts . Key themes include measurement invariance , digital-chemical addiction comorbidity , and psychological withdrawal mechanisms . Scientific Contributions: Co-developer of Bergen Work Addiction Scale Creator of Bergen-Yale Sex Addiction Scale Leadership in behavioral addiction epidemiology Recipient of Norwegian Research Council grants Advising & Collaborations: While no direct advisees are listed, Andreassen collaborates extensively with international researchers in work psychology , social media studies , and public health . Her work involves partnerships with Nottingham Trent University , Yale University , and National Competence Service for Sleep Disorders . Labs & Teams: Affiliated with the Department of Clinical Psychology and previously with the Department of Social Psychology at University of Bergen, she contributes to national health registry studies and cross-occupational research on addiction patterns.

• Behavioral Addictions
• Social Media Psychology
• Workaholism
• +۳ مورد دیگر

Sergio Moreno Gil is a Professor in the Department of Economics and Business Management at Universidad de Las Palmas de Gran Canaria (ULPGC), Spain. He is affiliated with the GIR TIDES research group (Economy, Environment, Sustainability and Tourism) and the Institute of Tourism and Sustainable Economic Development. His academic work focuses on tourism economics, marketing, and sustainability within the Social and Legal Sciences branch. Dr. Moreno Gil's research interests span across multiple dimensions of contemporary tourism. His primary focus areas include sustainable tourism development, destination marketing, sharing economy platforms in tourism, and consumer behavior analysis. He has made significant contributions to understanding tourism in the Canary Islands, particularly through his work with the Canary Islands Tourism Observatory. His research integrates traditional tourism studies with emerging fields like neurotourism and biometric analysis of tourist experiences. His publication record shows a clear trend toward addressing contemporary challenges in tourism. Recent works focus on sustainability in mass tourism destinations, the impact of sharing economy platforms, gastronomic tourism marketing, and collaborative tourism networks. His research demonstrates a strong methodological diversity, employing bibliometric analysis, social network analysis, and empirical studies of tourist behavior. Dr. Moreno Gil has been actively involved in the Canary Islands Tourism Observatory, contributing to annual reports on tourism sustainability in the region. His collaborative work spans across the Ibero-American region, with numerous co-authorships reflecting international research networks in tourism studies.

• Sustainable Tourism
• Tourism Marketing
• Sharing Economy in Tourism
• +۶ مورد دیگر

Professor Helen Kennedy is a leading scholar in digital society at the School of Sociological Studies, Politics and International Relations , University of Sheffield . She holds the title of Professor of Digital Society and is Director of the £4 million ESRC Digital Good Network. A Fellow of the British Academy (FBA) and the Academy of Social Sciences (FacSS), her work bridges academia and public policy through collaborations with the BBC, DWP, and international media organizations. Her educational background includes a BA in English and American Studies from the University of Birmingham, an MA in Cultural Studies from the Birmingham Centre for Contemporary Cultural Studies (CCCS), and a PhD from the University of East London (2002) on digital identity and multimedia. Helen's research centers on digital inequality, datafication, algorithmic culture, data ethics, and public engagement with data . She investigates how non-expert publics experience and interpret data, visualizations, and AI, with a focus on fairness, transparency, and resistance. Her work also examines data visualization in society , particularly in news media, and the emotional and cultural dimensions of data engagement. Her recent publications reveal a consistent trend in exploring public perceptions of data practices , the politics of data visualization , and ethical dimensions of data use across journalism, public services, and digital platforms. Themes include trust, fairness, emotion, and the socio-political shaping of data systems. Fellow of the British Academy (FBA) Fellow of the Academy of Social Sciences (FacSS) Helen has led numerous major grants from the ESRC, AHRC, Nuffield Foundation, and EPSRC , including projects like Living With Data , Generic Visuals in the News , and Seeing Data . She supervises PhD students on topics ranging from algorithmic bias to digital self-tracking and has completed 13 PhD supervisions. She actively collaborates with policy makers (DWP, BBC, DCMS) , media organizations (Financial Times, Reach PLC) , and NGOs to translate research into impact, particularly in web accessibility and data governance. She leads the Living With Data research programme and is involved in the Everyday Life and Critical Diversities and Science, Technology and Medicine in Society research groups. Her work with the ESRC Digital Good Network brings together academics, practitioners, and civil society to envision equitable digital futures.

• Digital Society
• Datafication
• Big Data
• +۱۲ مورد دیگر

Antony Franklin is an Associate Professor and Head of the Department of Computer Science and Engineering at the Indian Institute of Technology Hyderabad (IITH), India. He leads the Networked Wireless Systems (NeWS) Lab and is actively involved in 5G research, wireless networks, and cybersecurity. He earned his Ph.D. from IIT Madras in 2010. Education: Ph.D. in Computer Science and Engineering, IIT Madras, 2010 Research Interests: His research spans wireless networks , 5G systems , mobile edge computing , low-latency transport protocols , and cybersecurity . He focuses on next-generation mobile systems, especially 5G, aiming to meet the demands of ultra-low latency, high data rates, and quality of experience for services like IoT, autonomous driving, and VR. He has been involved in developing testbeds and prototypes to validate real-world performance of 5G technologies, including network slicing, LTE-WiFi integration, and edge computing. Scientific Awards: Best Academic Demo Award, IEEE COMSNETS 2018 Second Best Paper Award, IEEE ANTS 2017 Grants & Projects: Network Slice Life-cycle Management for 5G Mobile Networks – SPARC, MHRD (2019–2021) DNS/IPv6 for IoT Security – NASSCOM (2018–2019) CCRAN: Energy Efficiency in Cloud RAN – Intel India (2018–2021) End-to-End 5G Test-Bed – DoT, GoI (2018–2021) M2SMART Smart Cities – SATREPS (2018–2023) Ultra-Reliable Low Latency Protocols – STINT, Sweden (2017–2018) Low Latency 5G Protocols – SERB ECR (2016–2019) Lab & Team: He leads the NeWS Lab (Networked Wireless Systems) at IITH, which focuses on 5G, wireless networks, and IoT systems. The lab is actively involved in developing real-world testbeds and publishing in top-tier conferences and journals.

• Wireless Networks
• Mobile Networks
• 5G Networks and Systems
• +۵ مورد دیگر

Kora DeBeck is a Distinguished Professor of Substance Use and Drug Policy in the School of Public Policy at Simon Fraser University, a CIHR Applied Public Health Chair, and Dorothy Killam Fellow. She is also a Research Scientist with the BC Centre on Substance Use and Principal Investigator of the At-Risk Youth Study (ARYS), a longitudinal cohort tracking over 1,200 street-involved youth. Her research focuses on substance use policy, health services for marginalized populations, and the structural drivers of drug-related harms. She has published over 200 peer-reviewed articles challenging ineffective drug enforcement models and advocating for policy reforms. Recent publications analyze trends in opioid use, harm reduction during the COVID-19 pandemic, drug decriminalization, and youth-focused interventions. Her work consistently addresses social inequities through data-driven approaches to the toxic drug crisis. CIHR Applied Public Health Chair Dorothy Killam Fellow Michael Smith Health Research BC Scholar Award Distinguished SFU Professorship She has secured over $50 million in research funding, including $21M as principal investigator for ARYS. Her lab collaborates with healthcare providers, community organizations, and policymakers to translate research into practice.

• Substance Use
• Drug Policy
• Health Policy
• +۳ مورد دیگر

François Guimbretière is a Professor in the Department of Information Science at Cornell University, with affiliations to the Department of Design & Technology. He holds a PhD in Computer Science from Stanford University and previously served on the faculty at the University of Maryland before joining Cornell in 2009. His research centers on human-computer interaction, human-robot interaction, and interface design, with a strong emphasis on hardware/software co-design to create seamless, sustainable, and innovative interactive systems. His work spans multiple domains including interactive fabrication, remote collaboration, and low-power interfaces. Guimbretière's recent research explores novel fabrication methods such as interactive printing and yarn-based electronics, as well as immersive remote embodiment systems that reduce reliance on physical travel. These efforts reflect a broader trend toward sustainable and accessible interaction technologies. His publications demonstrate consistent contributions to top-tier venues in HCI and ubiquitous computing, focusing on tangible, wearable, and environmentally conscious interfaces. Scientific Recognition: He advises graduate and undergraduate researchers in the development of next-generation interactive systems. His lab supports projects in digital fabrication, remote presence, and sustainable design, often involving interdisciplinary collaboration. While specific grants are not listed, his research trajectory suggests sustained funding in human-centered technology innovation. He leads a research group focused on building practical, user-centered systems that bridge the digital and physical worlds through creative engineering and design. The lab emphasizes hands-on prototyping, real-world deployment, and the integration of traditional craft with advanced technologies.

• Human-Computer Interaction
• Human-Robot Interaction
• Interface Design
• +۷ مورد دیگر

David Bawden is a Professor in the Department of Library and Information Science (CityLIS) at City, University of London. With a publication record spanning over two decades, he has established himself as a leading scholar in information science, particularly known for his work on the philosophical foundations of information, knowledge organization, and information behavior. His research frequently intersects with Luciano Floridi's Philosophy of Information, which he has applied to library and information science theory and practice. Bawden's research interests focus on the theoretical underpinnings of information science, including information behavior, information literacy, knowledge organization, and the philosophical dimensions of information. His work often explores the conceptual frameworks that shape how we understand information in both physical and digital environments. He has made significant contributions to understanding information privacy through a philosophical lens and has examined temporal aspects of information in contemporary society. His recent publications demonstrate a continued focus on theoretical developments in information science, with particular attention to the implications of Floridi's work for library and information practice. Bawden's scholarship shows a consistent trajectory from examining historical aspects of information to contemporary challenges in the digital age, maintaining a strong theoretical orientation throughout. As a frequent collaborator with Lyn Robinson (also at City, University of London), Bawden has co-authored numerous papers exploring transitions between concepts of information across different domains, information overload, and the philosophical foundations of information science. His work has appeared in leading journals including the Journal of Documentation, Journal of the Association for Information Science and Technology, and Information Research. Bawden has been actively involved in the CityLIS program, contributing to innovative approaches to information science education including the development of curricula addressing data librarianship and the 'onlife' nature of contemporary information experience. His scholarship reflects a deep commitment to advancing the theoretical foundations of the field while maintaining relevance to practical information challenges.

• Information Science
• Library Science
• Information Behavior
• +۵ مورد دیگر

Dr. Mbita Mbao is an Assistant Professor in the School of Social Work at Salem State University, where she teaches courses including SWK 700 (Human Behavior), SWK 704/705 (Social Work Practice), and aging-focused courses like SWK 871. Her teaching philosophy emphasizes experiential learning and valuing student experiences. Dr. Mbao's research focuses on behavioral health, aging populations, workforce development, and immigrant issues. She actively works to expand aging-related curriculum and services through her involvement with the Older Adults Behavioral Health Network and Salem for All Ages initiative. Her education includes a BSW from Bowling Green State University, MSW from Rhode Island College, and PhD from Simmons University. As a Licensed Clinical Independent Social Worker, she maintains a clinical practice providing in-home therapy to older adults. Honors include: 2025 North Star Collective Fellow 2019 AGESW Pre-Dissertation Fellow 2021 GSA MCDTAW Early Career Diversity Fellow

• Behavioral Health
• Aging
• Workforce Development
• +۳ مورد دیگر

Karyn Moffatt is an Associate Professor in the School of Information Studies at McGill University and holds the Canada Research Chair in Inclusive Social Computing. As Graduate Program Director for the PhD program, she leads the Accessible Computing Technologies Research Group (ACT Lab), focusing on designing inclusive computing applications that support social engagement across diverse lifespans and abilities. Her work bridges human-computer interaction, accessibility research, and real-world community impact. Educational background: PhD in Computer Science, University of British Columbia MSc in Computer Science, University of British Columbia BASc in Computer Engineering, University of British Columbia Research Interests: Dr. Moffatt's work centers on inclusive social computing with emphases on aging populations , disability access , and intergenerational communication . She investigates how technology can overcome barriers to social participation through co-design methodologies, particularly for older adults and individuals with cognitive or physical disabilities. Current projects explore AI-enhanced aging support, dementia-friendly social platforms, accessible financial technology, and respite care coordination systems. Her approach integrates participatory design with rigorous usability testing to create solutions that address real-world challenges in healthcare, finance, and community engagement. Publication Trends: Analysis of her 15 most recent publications reveals consistent focus on aging and accessibility (60% of works), with growing emphasis on AI ethics (2025), dementia support systems (30% of 2023-2024 works), and accessible financial technology (2024). Methodologically, 75% employ co-design or participatory approaches, while 40% involve longitudinal field studies. Key venues include CHI (33%), ASSETS (20%), and ACM Transactions on Accessible Computing (27%), demonstrating leadership in top-tier HCI and accessibility forums. Scientific Awards: Multiple Best Paper Awards from ASSETS, CHI, and CSCW conferences Canada Research Chair in Inclusive Social Computing Advising and Grants: Dr. Moffatt currently supervises PhD candidates Chong Hu and Muhe Yang, having graduated four students since 2022 including Maurício Fontana De Vargas (2023) and Carrie Dai (2023). Her active grants include: NSERC Discovery Grant (2024-2029) as PI: Ethical AI for active aging Canada Research Chair renewal (2022-2027) as PI McGill Nursing Collaborative grant (2023-2025) as Co-I: iRespite mHealth app for palliative care Labs and Teams: She directs the ACT Lab, which partners with healthcare providers, public libraries, and community organizations to develop and deploy inclusive technologies. Current initiatives include the QuickPic AAC system for speech therapy, dementia-focused social programs with Montreal libraries, and Quebec-wide respite care coordination tools, all developed through interdisciplinary collaboration with clinicians, caregivers, and end-users.

• Human-Computer Interaction
• Accessibility
• Social Computing
• +۳ مورد دیگر

Laurent DUPONT is a Research Engineer and Co-coordinator of the IUVTT Master’s program at ENSGSI (École Nationale Supérieure de Géologie et de Sciences Industrielles), part of the Groupe INP in Nancy, France. He also serves as Scientific Manager of the Lorraine Fab Living Lab. His work focuses on user-driven innovation, smart and sustainable territories, collaborative engineering, and immersive environments. He holds a PhD in Industrial Systems Engineering from INPL (2009), a DEA (2004), and a degree in Industrial Systems Engineering (2003) from ENSGSI. Research interests include innovation lab strategies, open innovation spaces, territorial resilience, and digital twin applications in manufacturing. He leads projects like INEDIT, exploring co-design frameworks and circular economy solutions. His articles highlight trends in collaborative innovation networks, systemic impact mapping, and the integration of extended reality in industrial contexts. Key contributions include frameworks for evaluating territorial resilience and tools for monitoring innovation lab networks. He has been involved in initiatives such as the DHDA Project for resilience assessment and the Smagrinet project on smart grid training. His work bridges academia and practice through participatory methods and cross-sector collaborations. Current projects emphasize Industry 5.0, open manufacturing, and community-driven innovation.

• Innovation Engineering
• Sustainable Cities
• Collaborative Innovation
• +۴ مورد دیگر