جستجوی استاد راهنمای دانشگاهی

Christopher Rea is a Professor of Modern Chinese Literature in the Department of Asian Studies at the University of British Columbia's Faculty of Arts. He serves as a faculty member and former Associate Head of the Department of Asian Studies, former Director of the Centre for Chinese Research, an associate of the Hong Kong Studies Initiative, and a Faculty Fellow of St. John's College. His academic journey includes a Ph.D. from Columbia University (2008) and a B.A. from Dartmouth College (1999). Rea's research focuses on the modern Chinese-speaking world, with particular expertise in Chinese literature, cinema, print culture, translation, and the cultural history of humor and deception. His scholarly approach bridges literary analysis, cultural history, and film studies, creating a distinctive interdisciplinary perspective on modern Chinese cultural production. He is particularly known for his work on Republican-era China (1912-1949), exploring how cultural forms evolved during this transformative period. His major publications reveal a trajectory from studies of humor and laughter in modern China ( The Age of Irreverence , 2015) to literary hoaxes and deception ( The Book of Swindles , 2017), Chinese cinema ( Chinese Film Classics , 2021), and research methodology ( Where Research Begins , 2022). His current projects include China on the Make: Stories of Chinese Deception and The Unfinished Comedy , a sequel to The Age of Irreverence . National Endowment for the Arts Translation Fellowship (2024) UBC Dean of Arts Mentorship Award (2024) UBC Killam Research Prize (2022) Joseph Levenson Book Prize (2017) Rea actively supervises graduate students and has developed significant digital resources, including the Chinese Film Classics project (chinesefilmclassics.org) featuring 40+ subtitled Chinese films and 22 video lectures, and a YouTube channel with over 250 videos on Chinese cinema and culture. His teaching extends to free online courses on The Modern Chinese Novel and early Chinese cinema, demonstrating his commitment to making scholarly resources accessible beyond traditional academic boundaries.

• Modern Chinese literature
• Cinema and film history
• Cultural history
• +۵ مورد دیگر

Ben Nobbs-Thiessen is an Assistant Professor of History and Chair of Mennonite Studies at the University of Winnipeg. He holds a PhD from Emory University (2016), with prior roles as a research associate at Arizona State University (2016–18) and a teaching fellow at Washington State University (2018–2020). His research focuses on Mennonite migrations across the Americas, environmental change, and indigenous-settler relations. He teaches courses on Latin American Mennonites and Mennonite Studies II. His research combines archival work, field studies, and oral histories from Bolivia, Paraguay, Mexico, Canada, and the U.S. His 2020 book Landscape of Migration examines Bolivia’s lowland colonization and its intersection with Mennonite and indigenous communities. Current projects include a century-long study of Mexico-Canada Mennonite migrations linked to water scarcity and neoliberal reforms. His publications span journals like Journal of Latin American Studies and Agricultural History , addressing topics like frontier development, foodways, and border conflicts. His transnational approach bridges environmental, migration, and colonial histories. He contributes to interdisciplinary initiatives such as the Newberry Consortium in American Indian Studies and the Centre for Rupert's Land Studies.

• Mennonite Studies
• Environmental History
• Migration and Diaspora Studies
• +۳ مورد دیگر

Herman Barkema is a Professor in Epidemiology of Infectious Diseases at the Faculty of Veterinary Medicine, University of Calgary, with a joint appointment in the Department of Community Health Sciences, Cumming School of Medicine. His research focuses on preventing infectious diseases in cattle herds (e.g., mastitis, Johne’s disease) and antimicrobial resistance, integrating animal and public health perspectives under the One Health framework. He founded the Department of Production Animal Health and leads the AMR – One Health Consortium and CAN-AMR-Net. DVM, Veterinary Medicine, Utrecht University (1988) PhD, Veterinary Science, Utrecht University (1998) His work spans clinical veterinary epidemiology, antimicrobial resistance mechanisms, and zoonotic disease control. He has over 425 publications and collaborates globally, including as a Foreign Expert at China Agricultural University. Recent research trends highlight his focus on multi-omics approaches, ceRNA networks, and antimicrobial stewardship in dairy systems, with significant contributions to Johne’s disease diagnostics and mastitis prevention. Roger Morris ISVEE Award (2024) Plowright Prize (2022) Killam Annual Professorship (2019) Multiple Journal of Dairy Science Most Cited Awards (2011–2024) Fellow, Canadian Academy of Health Sciences (2014) Dr. Barkema supervises graduate students and postdoctoral fellows, emphasizing interdisciplinary mentorship. He co-developed the Veterinary DialogueTrainer for clinical communication training and participates in public engagement initiatives like Breakfast on the Farm. He leads the AMR – One Health Consortium and CAN-AMR-Net, integrating stakeholders across Canada and internationally. His affiliations include the Snyder Institute for Chronic Diseases and strategic initiatives on Infectious Diseases and One Health (2015–2025).

• Epidemiology of Infectious Diseases
• Antimicrobial Resistance
• Veterinary Epidemiology
• +۳ مورد دیگر

Dr. Carolyn Emery is a Professor in the Faculty of Kinesiology at the University of Calgary, with joint appointments in Pediatrics and Community Health Sciences at the Cumming School of Medicine. She holds leadership roles as Chair of the Sport Injury Prevention Research Centre (an International Olympic Committee Research Centre) and the Alberta Children’s Hospital Research Institute. Her affiliations include the McCaig Institute for Bone and Joint Health, Hotchkiss Brain Institute, and O’Brien Institute for Public Health. Dr. Emery’s education includes a BScPT from Queen’s University (1988), MSc in Epidemiology from the University of Calgary (1999), and PhD in Epidemiology from the University of Alberta (2004). Her research focuses on injury prevention in youth sports, concussion, and pediatric rehabilitation, aiming to reduce long-term health consequences such as osteoarthritis and post-concussion syndrome. She leads major grants including CIHR’s “SHRed Injuries” and NFL-funded concussion surveillance programs. Her research interests emphasize practical interventions for injury prevention, including neuromuscular training and policy changes. Recent work explores concussion outcomes in adolescents, biomechanical injury mechanisms, and global sport safety initiatives. She has published extensively on topics like sport-related musculoskeletal injuries, concussion management, and the epidemiology of youth sports. Dr. Emery has received over 20 awards, including the Royal Society of Canada Fellowship, Killam Professorship, and CIHR Canada Research Chair. Her work bridges clinical practice, policy, and community engagement to enhance public health outcomes in sports and youth recreation. Her lab, the Sport Injury Prevention Research Centre, collaborates internationally to develop evidence-based strategies for injury prevention. Current projects include evaluating the impact of tackle laws in rugby, head acceleration in wrestling, and long-term consequences of pediatric concussions.

• Injury Prevention
• Concussion Research
• Pediatric Rehabilitation
• +۳ مورد دیگر

Geoffrey E. Hinton is a distinguished Professor in the Department of Computer Science at the University of Toronto. He is renowned for his foundational contributions to machine learning, particularly in the development of deep learning and neural networks. His research focuses on understanding learning processes in both artificial and biological systems, with key contributions including Boltzmann machines, backpropagation, and deep belief networks. He teaches advanced machine learning courses such as CSC2535, emphasizing topics like graphical models, variational inference, and deep learning architectures. His work has been published extensively in top journals and conferences, with recent papers exploring forward-forward algorithms, analog diffusion models, and scalable neural network training methods. Hinton has advised numerous PhD and master's students and collaborates with institutions like Vector Institute. He is a central figure in the global AI community, regularly presenting at conferences (e.g., 2023 talks on CBS 60 Minutes, BBC, and PBS). His lab focuses on advancing machine learning theory and applications, addressing challenges in vision, language, and generative models.

• Machine Learning
• Artificial Intelligence
• Neural Networks
• +۳ مورد دیگر

Wiebke von Carolsfeld serves as a Professor in Cinema at Concordia University, where she holds a primary academic appointment focused on film production and creative practice within the university's cinema program. Her research and creative practice spans directing, screenwriting, and editing across multiple cinematic formats including feature film, independent film, documentary, and shorts . She demonstrates particular expertise in narrative genres such as drama and comedy , with significant experience in international co-productions that facilitate cross-cultural collaborations. Her creative work extends beyond film into prose and novel writing , reflecting an interdisciplinary approach to storytelling. Professor von Carolsfeld maintains active engagement with the film community through her practice-based research and creative output, though specific advising relationships and grant activities are not detailed in available institutional documentation. She remains a current faculty member contributing to Concordia University's cinematic arts education mission.

• directing
• screenwriting
• editing
• +۸ مورد دیگر

Dr. Camila Aquino serves as Assistant Professor in both the Department of Clinical Neurosciences and Department of Community Health Sciences at the University of Calgary's Cumming School of Medicine, and is a Full Member of the Hotchkiss Brain Institute. As Medical Director of the Deep Brain Stimulation Program, she specializes in Parkinson's disease, essential tremor, dystonia, and chorea management, including EMG-guided botulinum toxin injections. Her educational background includes: M.D. in Medicine from Escola Superior de Ciencias da Santa Casa (2005) M.S. in Neurosciences from Federal University of Sao Paulo (2012) Ph.D. in Neurosciences from Federal University of Sao Paulo (2019) M.S. in Health Research Methods, Clinical Epidemiology from McMaster University (2020) Dr. Aquino's research addresses unmet needs in movement disorders through innovative clinical trial designs for Parkinson's disease, focusing on precision-medicine approaches, early intervention, and outcome optimization. She actively evaluates neuromodulation therapies including Deep Brain Stimulation, Spinal Cord Stimulation, and MRgFUS, with emphasis on expanding indications and improving patient outcomes. As an International Parkinson and Movement Disorder Society member, she chairs the web-based learning committee and serves on evidence-based medicine and outcome measure committees. Analysis of her 15 most recent publications (2021-2025) reveals a cohesive research trajectory centered on Parkinson's disease management, with dominant themes in motor fluctuation treatments, deep brain stimulation methodology, and clinical trial innovation. Her work bridges fundamental clinical practice guidelines with advanced neuromodulation technologies, demonstrating consistent commitment to evidence-based solutions for movement disorders. Her scientific recognition includes: Parkinson Canada research grant Mohammed Al Zaibak Foundation scholarship CAPES scholarship from Brazilian Ministry of Education Dr. Aquino has secured significant research funding supporting clinical trials in Parkinson's disease neuroprotection and neuromodulation therapies. While specific student advisees aren't listed, her leadership of the DBS Program and active clinical trial portfolio indicate substantial mentorship responsibilities. Her grant portfolio emphasizes translational research with direct clinical impact. She directs the University of Calgary's Deep Brain Stimulation Program and contributes to the MRI-guided focused ultrasound initiative. Through her International Parkinson and Movement Disorder Society committee roles, she shapes global educational standards and evidence-based practices in movement disorders.

• Movement Disorders
• Parkinson's Disease
• Deep Brain Stimulation
• +۵ مورد دیگر

Maja J Matarić is the Chan Soon-Shiong Chaired and Distinguished Professor of Computer Science at the University of Southern California's Viterbi School of Engineering, with courtesy appointments in Neuroscience and Pediatrics. She serves as founding director of the USC Robotics and Autonomous Systems Center, co-director of the USC Robotics Research Lab, and Principal Scientist at Google DeepMind. Previously, she held leadership roles as USC's interim Vice President of Research (2020-2021) and Vice Dean for Research (2006-2019). Her educational background includes: PhD in Computer Science and Artificial Intelligence from MIT (1994) MS in Computer Science from MIT (1990) BS in Computer Science from University of Kansas (1987) Matarić pioneers Socially Assistive Robotics (SAR) , a field her lab named, focusing on human-robot interaction that provides assistance through social rather than physical support. Her research targets critical health and wellness challenges including post-stroke rehabilitation, autism spectrum disorder therapy, cognitive exercises for Alzheimer's patients, ADHD academic support, and mental health interventions. She develops systems modeling user engagement, personality, and motivation, with extensive real-world deployments in schools, rehabilitation centers, and homes. Analysis of her recent publications reveals dominant themes in cognitive health robotics (2025 CHI paper on LLM-powered elder care), pediatric assistive technology (2025 IDC speech therapy review), and adaptive preference modeling (2025 HRI contrastive learning work). Her research consistently bridges machine learning with human-centered design for vulnerable populations. Major scientific recognition includes: ACM Athena Lecturer Award (2024) ACM Eugene L. Lawler Humanitarian Award (2024) ACM Fellow (2020) Presidential Mentoring Award (2011) Multiple society fellowships (AAAS, IEEE, AAAI) As a dedicated mentor, Matarić has championed underrepresented groups through CRA-W, placing numerous women in faculty positions. She leads USC Viterbi's K-12 STEM Outreach Program serving low-income Los Angeles schools and authored The Robotics Prime for student education. Her research has secured significant funding enabling real-world technology transfer, with documented impact in rehabilitation centers and homes through deployable SAR systems. Her Robotics Research Lab at USC drives innovation in embodied AI, with current projects spanning LLM-integrated elder care robots, ADHD academic companions, and autism therapy systems. The lab emphasizes co-design with end-users and rigorous real-world validation across diverse populations.

• Socially Assistive Robotics
• Human-Robot Interaction
• Assistive Technology
• +۷ مورد دیگر

Ameil Joseph is an Associate Professor at McMaster University's School of Social Work, where they contribute to critical scholarship at the intersection of mental health, race, and social justice. Their work examines how ideas about difference, normalcy, sexuality, eugenics, race, ability and mental 'illness' cohere and perform within policy, law and practice, with over a decade of professional experience in mental health settings including supportive housing, settlement services, crisis respite, and forensic community treatment. Education: Ph.D in Social Work, York University (2009-2014) MSW, Wilfrid Laurier University (2005-2007) BA in Psychology, University of Waterloo (1998-2003) Dr. Joseph's research engages with critical mental health, postcolonial theory, critical race theory, and critical disability studies to examine the historical production of ideas about difference. Their scholarship particularly focuses on how these ideas manifest in mental health systems, immigration policy, and criminal justice, with attention to issues of social justice, violence, ethics, and confluence. Their work bridges theoretical frameworks with practical implications, addressing the complex interplay of colonialism, racism, sanism, and eugenics in contemporary social systems. Analysis of Dr. Joseph's recent publications reveals a sustained focus on colonial and eugenic violence within mental health, immigration, and criminal justice systems. Their scholarship consistently examines how racism, sanism, and ableism intersect to produce particular forms of state violence, particularly against racialized immigrants with mental health conditions. Recent work has expanded to address temporal dimensions of oppression, data colonialism, and community responses to grief and loss during the pandemic, demonstrating both theoretical sophistication and practical relevance to current social issues. Scientific Awards: University Scholar 2025 - Recognized for research leadership and impact among eight McMaster professors honored as University Scholars Dr. Joseph has secured significant research funding, including nearly $75,000 from the Social Sciences and Humanities Research Council (SSHRC) for community-engaged projects addressing social justice issues. Their teaching portfolio includes advanced courses on critical mental health perspectives, race and colonialism in Canadian society, and social justice theory. While specific graduate students aren't listed in available materials, their extensive co-author network suggests active mentorship and collaboration. Dr. Joseph contributes to community-based initiatives in Hamilton addressing racism in healthcare and mental health systems, connecting academic scholarship with practical community responses to systemic issues. Dr. Joseph maintains an active presence in community responses to contemporary challenges, particularly through initiatives addressing grief during the pandemic and systemic racism in healthcare. Their work exemplifies the integration of scholarly rigor with community engagement, demonstrating how academic research can inform and be informed by real-world social justice efforts.

• Critical Mental Health
• Postcolonial Theory
• Critical Race Theory
• +۱۰ مورد دیگر

Dr. Keith Alexander Sharkey is a Professor in the Department of Physiology and Pharmacology at the Cumming School of Medicine, University of Calgary. He is also a Full Member of both the Hotchkiss Brain Institute and The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases. Dr. Sharkey has been at the University of Calgary since his appointment as Assistant Professor in 1990, dedicating his career to understanding the neural control of the gastrointestinal tract. From 2005-2021, he held the Crohn's and Colitis Canada Chair in Inflammatory Bowel Disease Research, demonstrating his longstanding commitment to advancing knowledge in gastrointestinal sciences. Dr. Sharkey's educational journey began with a BSc (Hons) in Nutrition from the University of London in 1981, followed by a PhD in Physiology from the University of Liverpool in 1985. After completing postdoctoral training in Hungary, the UK, and Canada, he joined the University of Calgary faculty in 1990, where he has remained throughout his distinguished academic career. Dr. Sharkey's research program centers on understanding the physiology and pathophysiology of the neural control of the gastrointestinal tract and brain-gut interactions in health and disease. His laboratory investigates two main areas: the role of the endocannabinoid system in regulating GI motility and intestinal barrier function, and the physiology of the enteric nervous system in controlling motility and barrier function. His work employs state-of-the-art approaches including live cell imaging and molecular genetics. Recent publications show his expanding interest in connections between gut function and neurodegenerative conditions like ALS, with multiple 2024-2025 papers examining sexual dimorphism in disease processes and gut-brain axis mechanisms. Fellow, Royal Society of Canada (2024) Cumming School of Medicine's van de Sande Distinguished Achievement Award for Mentorship (2021) Distinguished Research Award, American Physiological Society (2021) Finkelstein Award for Excellence, Crohn's and Colitis Canada (2016) Fellow, Canadian Academy of Health Sciences (2015) Fellow, Canadian Association of Gastroenterology (2015) Killam Annual Professor Award, University of Calgary (2013) Dr. Sharkey has mentored numerous students throughout his career, as evidenced by his 2021 Mentorship Award. His research is supported by significant funding, including a CIHR Foundation grant exploring how enteric nerves and glia maintain intestinal homeostasis. He has also participated in university strategic initiatives focused on Brain and Mental Health (2015-2021) and Infections, Inflammations and Chronic Diseases (2015-2021), demonstrating his interdisciplinary approach. The Sharkey Lab provides a safe, inclusive, and diverse research environment that encourages open scientific exchange from diverse viewpoints. His laboratory is actively engaged in multiple collaborative projects, including investigations with UBC Okanagan on diet and probiotics targeting the gut-brain metabolic interactome, and with University of Calgary colleagues studying gut microbiota's role in ALS. Dr. Sharkey continues to advance our understanding of neural mechanisms controlling gastrointestinal function with upcoming courses scheduled for Fall 2024 and Winter 2025.

• Enteric nervous system
• Gut-brain axis
• Endocannabinoid system
• +۳ مورد دیگر

Anamaria Crisan is an Assistant Professor at the University of Waterloo, affiliated with the Insight Lab. Her research focuses on interdisciplinary work at the intersection of Human-Computer Interaction (HCI), Data Visualization, and Applied AI/ML. She explores human-centered approaches to AI/ML systems, visualization design for decision-making, and healthcare data science applications. Dr. Crisan holds a PhD in Computer Science from the University of British Columbia (2019), an MSc in Bioinformatics (2010), and a BComp in Biomedical Computing from Queen’s University (2008). Her educational background bridges computer science, biology, and healthcare informatics. Her research interests include responsible AI/ML systems, interactive visualization for data-driven decisions, and leveraging visualization in healthcare to improve outcomes. She emphasizes transparency, trustworthiness, and human alignment in AI technologies. Her work spans diverse applications such as genomic epidemiology, dashboard design, and ethical AI evaluation. Notable contributions include studies on human-AI collaboration, visualization linters, and scalable dashboard census methodologies. She has published widely in top-tier venues like IEEE VIS and ACM CHI. Dr. Crisan’s lab (UW Insight Lab) focuses on human-centered approaches to automating data science and improving visualization practices in critical domains like healthcare and public health.

• Human-Computer Interaction
• Data Visualization
• Applied AI/ML
• +۳ مورد دیگر

Tanya Trussler is Associate Professor in the Department of Economics, Justice, and Policy Studies at Mount Royal University. Her research examines structural determinants of violent crime, policing practices, crime prevention strategies, and public perceptions of criminal justice systems. Research explores police-community relations across different contexts, including recent projects on rural versus urban policing perceptions in Alberta and religious influences on policing in Pacific Island countries. Methodologically specializes in survey research and comparative analysis. Recipient of multiple research grants including from Immigration, Refugees and Citizenship Canada, and British Columbia's Crime Reduction Research program. Actively presents findings at major conferences including Congress of the Humanities and Social Sciences.

• Criminology
• Policing Studies
• Violent Crime
• +۲ مورد دیگر

Claire Célérier is an Associate Professor of Finance at the Rotman School of Management, University of Toronto, where she holds the Canada Research Chair in Household Finance. Her academic career spans prestigious institutions including the University of Toronto (where she advanced from Assistant to Associate Professor between 2016-2022) and the University of Zurich (2014-2016). She maintains an affiliation with the People's History Lab and actively contributes to academic discourse through conference organization including 'Race, Equity and Public Policy' (2023) and 'Banks, States and the People' (2024). Dr. Célérier's research explores how finance can benefit households through multiple lenses including behavioral economics, asset pricing, and financial history. Her work investigates innovation in finance, diversity and inclusion impacts, and historical perspectives on financial systems. She has developed significant expertise in household finance, banking, and the intersection of finance with social issues, particularly racial disparities in financial markets as demonstrated in her award-winning research on the Freedman's Savings Bank. Her scholarly output shows a clear trajectory from foundational work on security design and investor behavior toward increasingly socially relevant research on financial inclusion, racial equity, and household financial decision-making. Recent publications demonstrate her growing focus on historical contexts of financial systems and their contemporary implications, particularly regarding marginalized communities. Canada Research Chair in Household Finance (2024) Bank of Canada Governor's Award (2022) University of Toronto Top 5% Merit Award (2021) Petro Canada Young Innovators Award Program (2021) Multiple Rotman School of Management Teaching Awards (2019-2021) Ieke van den Burg Prize for Research on Systemic Risk (2015) Dr. Célérier has successfully secured substantial research funding including Insight Development Grants (CAD 54,500), Connaught Research Grant (CAD 10,000), and the Marianne and Marcus Wallenberg Foundation Grant (EUR 400,000). She mentors several PhD students including Andrada Bilan (2020), Alexey Vasilenko (2023), and Purnoor Tak (Expected 2026), and has supervised numerous master's theses at both University of Toronto and University of Zurich. Her service contributions include Rotman School of Management MBA program committee, executive committee, seminar coordination, and faculty recruiting committee.

• Household Finance
• Banking
• Behavioral Economics
• +۴ مورد دیگر

Aishwarya Agrawal is an Assistant Professor at Université de Montréal in the Department of Computer Science and Operations Research (DIRO), affiliated with Mila – Quebec Institute of Artificial Intelligence and a Canada CIFAR AI Chair. She also serves as a research scientist at Google DeepMind, spending one day weekly there. Education: B.E. in Electrical Engineering (IIT Gandhinagar, 2014), Ph.D. in Computer Science (Georgia Tech, 2019). Her research focuses on multimodal learning , deep learning , natural language processing , and computer vision , particularly in developing AI systems that 'see' and 'communicate' effectively. Grants & Awards: Canada CIFAR AI Chair, 2020 Sigma Xi Best PhD Thesis Award, NVIDIA Fellowship (2018–2019), and multiple fellowships from Google and Facebook. She leads projects like Advancing Multimodal Vision-Language Learning (CRSNG-funded) and StarDoc: Document Structure Extraction (MITACS). Research Contributions: Pioneered benchmarks like CulturalVQA and UI-Vision , and frameworks such as PROGRESS for efficient VLM training. Her work emphasizes cross-modal alignment, robust evaluation, and cultural understanding in AI systems. Labs/Teams: Active in Mila’s core academic group and collaborates with Google DeepMind on multimodal and vision-language research. Supervises a dynamic team of PhD and master’s students in Montreal.

• Multimodal learning
• Deep learning
• Natural language processing
• +۳ مورد دیگر

Dr. Alex Bigazzi is an Associate Professor and Associate Head (Undergraduate Program) in the Department of Civil Engineering at the University of British Columbia (UBC), with a joint appointment in the School of Community and Regional Planning. He leads the REACT Lab, focusing on active transportation, micromobility, and sustainable infrastructure design. His research emphasizes the intersection of physics, physiology, and behavior in active travel, particularly for pedestrians and cyclists, and addresses emissions reduction and equitable urban mobility. Bigazzi holds a B.M. in Jazz Saxophone from the University of Miami and a Ph.D. in Civil Engineering from Portland State University. His career includes academic and practical contributions, such as founding the REACT Lab and leading projects on e-bike incentives, air pollution exposure, and infrastructure design. His work has earned awards like the 2024 Wall Legacy Award for inclusive transport design and the 2023 Climate Action Award. He teaches courses on pedestrian/bicycle facility design and capstone projects, mentoring students through UBC’s Civil Engineering programs.

• Active travel (walking/cycling)
• Micromobility and e-bikes
• Pedestrian and bicycle facility design
• +۳ مورد دیگر