جست‌وجوی استاد و پژوهشگر

• Immigration Law
• Constitutional Law
• Citizenship
• +۴ مورد دیگر

Stella Burch Elias is a Professor of Law at the University of Iowa College of Law, where she has established herself as a prominent scholar in immigration law, constitutional law, and human rights. Her academic work spans over fifteen years, with publications appearing in prestigious law journals including the Columbia Human Rights Law Review, Wisconsin Law Review, and Iowa Law Review. Professor Elias's research focuses on the intersection of immigration policy with constitutional protections, federalism, and human rights. Her work examines how immigration enforcement impacts constitutional rights, analyzes the balance of power between state and federal governments in immigration matters, and explores comparative approaches to detention policies and citizenship requirements. She has published extensively on topics including refugee policy, minority language rights in Europe, and the legal frameworks for detaining terrorist suspects from a comparative perspective. Her scholarly contributions demonstrate a consistent focus on how law functions as both a protective mechanism and potentially as an instrument of control in immigration contexts. Elias's recent work, including her 2025 publication on Attorney General Self-Referral in Immigration Law, continues to address timely issues at the forefront of legal scholarship and policy debates. Professor Elias has collaborated with scholars from various institutions, including Northwestern University, demonstrating her engagement with the broader legal academic community. Her work has been cited in legal scholarship and appears to influence ongoing debates about immigration policy and constitutional rights. While specific details about her teaching responsibilities are not provided in the available information, her scholarly output suggests she is actively engaged in both research and likely in teaching courses related to immigration law, constitutional law, and human rights at the University of Iowa College of Law.

• Patent Law
• Civil Procedure
• Federal Circuit Jurisdiction
• +۴ مورد دیگر

Paul R. Gugliuzza is a Professor at the University of Texas at Austin School of Law, where he has established himself as a leading scholar in patent law and civil procedure. With 41 scholarly publications to his name, his research has appeared in prestigious law journals including Duke Law Journal, Vanderbilt Law Review, and Virginia Law Review. He has testified before both the House Committee on Energy and Commerce and the Senate Judiciary Committee on patent-related matters, demonstrating his influence in shaping patent policy. Professor Gugliuzza's research focuses on the intersection of patent law and civil procedure, with particular expertise in Federal Circuit operations, venue selection, judicial behavior in patent cases, and mandamus practice. His work consistently examines how procedural mechanisms affect substantive patent rights, with recent scholarship exploring judge shopping, gender and racial inequality in patent litigation, and the evolving relationship between the Supreme Court and the Federal Circuit in patent matters. His research combines doctrinal analysis with empirical insights to reveal systemic patterns in patent adjudication. An analysis of his 15 most recent publications reveals a clear trajectory toward examining equity issues within patent law while maintaining his foundational focus on procedural mechanisms. His recent work increasingly addresses gender and racial disparities in patent litigation while continuing to analyze the structural aspects of patent adjudication. The scholarship demonstrates sophisticated methodology, often combining quantitative analysis with traditional legal scholarship to produce insights relevant to both practitioners and policymakers. Professor Gugliuzza has established significant collaborative relationships with leading scholars including Mark A. Lemley, Jonas Anderson, and Rachel Rebouché. His scholarship has been cited by courts and has influenced congressional hearings on patent reform. His testimony before congressional committees on patent demand letter practices and patent eligibility demonstrates the practical impact of his academic work on legislative processes.

Cynthia H. Chuangمشاهده پروفایل

استاد

• Reproductive Wellness
• Contraceptive Policy
• Women's Health
• +۳ مورد دیگر

Cynthia H. Chuang, MD, MSc, serves as Professor of Medicine and Public Health Sciences at Pennsylvania State University's College of Medicine and Penn State Health Milton S. Hershey Medical Center. She holds concurrent professorships in the Department of Public Health Sciences and Department of Obstetrics and Gynecology, and serves as Chief of the Division of General Internal Medicine. Her leadership encompasses academic physicians and scientists developing innovative educational programs and research initiatives, including critical patient care responses during the COVID-19 pandemic. Dr. Chuang's research focuses on reproductive wellness and contraceptive policy, with particular emphasis on how state and federal policies affect women's access to care. Her work consistently addresses preventive care frameworks and evidence generation for reproductive health interventions. As a physician-scientist and general internist, she bridges clinical practice with health services research to improve primary care delivery for women. Analysis of her 15 most recent publications reveals strong thematic continuity in reproductive health policy research, with increasing emphasis on post-pandemic healthcare delivery, contraceptive coverage mandates, and equity-focused implementation science. Her work demonstrates methodological diversity spanning randomized controlled trials, policy analyses, and large-scale observational studies. Key scientific recognition includes the 2014 Outstanding Collaborative Research Team award. Her research portfolio demonstrates sustained NIH, PCORI, and AHRQ funding, particularly for projects examining contraceptive coverage policies and reproductive life planning interventions. Dr. Chuang has led significant research collaborations including the MyNewOptions study (PCORI-funded), which tested web-based reproductive life planning tools for contraceptive decision-making among 984 privately insured Pennsylvania women. Her current R01 project examines how state and federal contraceptive coverage policies affect women's access to care, reflecting ongoing commitment to policy-relevant research.

• Thoracic Surgery
• General Surgery
• Lung Cancer
• +۳ مورد دیگر

Osita I. Onugha, MD , is a Clinical Assistant Professor in the Department of Surgery at Charles R. Drew University of Medicine and Science . With a focus on thoracic surgery and minimally invasive techniques, his work addresses advancements in procedures for lung cancer, diaphragmatic conditions, and trauma care. Institution: Charles R. Drew University of Medicine and Science Department: Surgery Academic Rank: Clinical Assistant Professor His research spans Lung Neoplasms , Thoracic Surgical Procedures , and Medical Technology , emphasizing improved clinical outcomes through innovative surgical methods. Recent publications highlight applications of Indocyanine Green in thoracic surgery, resource optimization during the SARS-CoV-2 pandemic , and diagnostic accuracy in stage I lung cancer . Key trends in his publications include: Minimally Invasive Techniques: VATS (Video-Assisted Thoracoscopic Surgery) applications in lung cancer, diaphragmatic surgery, and rib fracture management. Diagnostic Innovation: Blood-based biomarkers and wire localization for early-stage lung cancer detection. Clinical Efficiency: Tracheostomy protocols during pandemics and comparative studies on surgical tools like staplers versus sutures. His work frequently intersects General Surgery , Thoracic Surgery , and Cancer Therapeutics , with citations in journals like Surgical Technology International and BMC Cancer .

Cynthia Liemمشاهده پروفایل

دانشیار

• Classical Music
• Knowledge Engineering
• Music Information Retrieval
• +۶ مورد دیگر

Cynthia Liem is an Associate Professor at the Multimedia Computing Group of Delft University of Technology, uniquely bridging classical music and computer science. Her interdisciplinary career includes dual master’s degrees in classical piano performance and computer science, as well as a PhD in Music Information Retrieval (MIR). She focuses on making information accessible while addressing systemic blind spots in AI, data quality, and annotation practices, with applications in classical music, library domains, and fair hiring. Liem also advocates for ethical AI through public debates, notably analyzing algorithmic bias in the childcare benefits scandal. Key Roles: Associate Professor (TU Delft), Co-founder of ICT Next Generation (ICTng) Expertise: Music Information Retrieval, Responsible Artificial Intelligence, Data Validity Research Interests: Liem’s work examines how AI systems can better accommodate nuanced domains like classical music, where traditional metadata frameworks (e.g., artist, album) fail to capture multi-movement compositions and interpretive differences. She extends this to broader societal challenges, including fair data-driven decision-making and reducing translational barriers between technical and non-technical disciplines. Scientific Awards: Google Scholarship for PhD Research Advisory & Societal Impact: Liem actively engages in public discourse on algorithmic accountability and co-founded ICTng to amplify junior ICT academics' voices in national policy discussions. Her career reflects a commitment to interdisciplinary collaboration and ethical technology design.

Gopal Lalchandaniمشاهده پروفایل

استادیار

• Hand Surgery
• Upper Extremity Trauma
• Wide-Awake Hand Surgery
• +۶ مورد دیگر

Dr. Gopal Lalchandani is an Assistant Professor in the Department of Orthopaedic Surgery at the University of California, San Francisco (UCSF) School of Medicine. He is a board-certified orthopedic surgeon specializing in hand, elbow, and peripheral nerve surgery, with clinical expertise spanning both adult and pediatric upper extremity conditions. Dr. Lalchandani maintains active clinical practice at UCSF Medical Center in San Francisco, where he sees patients for a wide range of upper extremity injuries and disorders. Education: Medical Degree: Washington University School of Medicine, St. Louis (2016) Residency: Orthopedic Surgery at UCSF (2021), served as chief resident Fellowship: Hand and Upper Extremity Surgery at Brigham and Women's Hospital, Boston Children's Hospital, and Massachusetts General Hospital (2022) Dr. Lalchandani's research program focuses on clinical outcomes in hand surgery, with particular emphasis on wide-awake hand surgery techniques using local anesthesia, distal radius fracture management, and postoperative outcomes following upper extremity procedures. His work bridges clinical practice with healthcare system considerations, examining cost-effectiveness, opioid use patterns, and health disparities in orthopedic care. He has published extensively in leading orthopedic and hand surgery journals, with recent publications extending into 2025 that address critical topics including racial disparities in shoulder surgery, resident education in hand surgery, and shared decision-making approaches. Analysis of Dr. Lalchandani's publication record reveals a strong commitment to improving hand surgery education, optimizing surgical techniques, and addressing healthcare disparities. His research spans biomechanics, clinical outcomes, surgical education, and health policy implications within orthopedics, demonstrating both technical expertise and systems-level thinking about healthcare delivery. With over 165 patient reviews averaging 4.8 out of 5 stars, Dr. Lalchandani is recognized for his compassionate care, excellent communication skills, and technical expertise. Patients consistently praise his ability to listen carefully, explain complex conditions clearly, and develop thoughtful treatment plans that incorporate patient preferences. Dr. Lalchandani also maintains active involvement in resident education at UCSF, contributing to the training of future orthopedic surgeons. His clinical practice encompasses both routine and highly complex cases, including acute trauma, post-traumatic reconstruction, congenital hand disorders in children, and revision surgery for failed previous procedures.

Francisca Velcekمشاهده پروفایل

استاد

• Pediatric Surgery
• Pediatric and Adolescent Gynecology
• Congenital Malformations
• +۲ مورد دیگر

Dr. Francisca Velcek serves as Chief of the Division of Pediatric Surgery and Professor of Surgery at Downstate Health Sciences University. Appointed to the surgical faculty in 1975 by Dr. Samuel Kountz, she became the first woman member of the department and achieved full Professor rank in 1991. Board certified in general surgery with special certification in Pediatric Surgery and surgical critical care, she maintains active clinical practice. Her educational background includes: Medical degree from University of Philippines College of Medicine (1966) General surgical residency at St. Clare's Hospital Medical Center, New York City (1971) Pediatric surgery fellowship at Downstate Health Sciences University / Kings County Hospital under Dr. Peter K. Kottmeier Dr. Velcek specializes in complex pediatric surgical cases including anorectal malformations, congenital lesions, and neonatal/adolescent gynecologic problems. She excels in high-risk thoracic, pulmonary, intra-abdominal, gynecologic, and urologic procedures with exceptional clinical outcomes, consistently taking on the most challenging cases in her field. Her military service during Operation Desert Storm earned her the Distinguished Service medal and Commendation medal from the US Army for serving as Chief of Pediatric Surgery at Walter Reed Army Medical Center. She retired from the US Army Reserve Medical Corps as a Lieutenant Colonel. As a dedicated mentor, Dr. Velcek has profoundly influenced residents toward academic pediatric surgery careers, with many mentees now holding leadership positions nationally. She previously served as President of the Society of Philippine Surgeons in America and currently sits on the Executive Council of the New York Surgical Society.

Joseph B. Zwischenbergerمشاهده پروفایل

استاد

• Cardiothoracic Surgery
• Extracorporeal Membrane Oxygenation (ECMO)
• Cardiovascular Research
• +۳ مورد دیگر

Joseph B. Zwischenberger, MD, is a Professor of Surgery and Pediatrics at the University of Kentucky College of Medicine , with affiliations to the Saha Cardiovascular Research Center , CVRC - Affiliated Faculty , and the Surgery/Cardiac MD/PhD Program Mentor . His clinical and research focus spans cardiothoracic surgery , ECMO technology , and critical care innovations , particularly in artificial organ development and postoperative pain management . Education: MD from University of Kentucky Residency: University of Michigan, Ann Arbor Fellowships: Cardiac Division (NIH), Cardiothoracic Surgery, and Critical Care (University of Michigan) Certifications: American Board of General Surgery (Vascular and Thoracic Surgery) His research explores ECMO program development , respiratory failure mechanisms , and congenital heart defect support systems , emphasizing multidisciplinary collaboration in medical device innovation and pediatric cardiovascular care . Key trends include postoperative critical care protocols , tracheal replacement technologies , and surgical education reform to enhance resident autonomy. Notable scientific contributions include leadership in JACC Scientific Expert Panel on ECMO and foundational work on transhiatal esophagectomy for esophageal carcinoma. His 2023 Annals of Thoracic Surgery article addresses ICU governance models, while his 2024 Ann Thorac Surg Short Rep case study highlights device complication analysis. As an MD/PhD program mentor , he trains future physician-scientists and collaborates with the Saha Cardiovascular Research Center on translational studies. His work has shaped thoracic surgical protocols, including epidural placement guidelines and Fontan procedure optimization .

• Virtual Reality
• Serious Games
• Human-Computer Interaction
• +۴ مورد دیگر

Helmut Hlavacs is a Professor at the University of Vienna's Faculty of Computer Science, with a distinguished career spanning over two decades in virtual reality, serious games, and human-computer interaction research. His work bridges computer science with psychological and medical applications, particularly in therapeutic contexts for children and adolescents. Dr. Hlavacs' research interests focus on virtual reality applications for healthcare, serious game design for therapeutic purposes, and innovative human-computer interaction techniques. His work demonstrates particular expertise in applying game technologies to address psychological conditions, medical treatments, and educational challenges. He has made significant contributions to VR therapy systems for anxiety disorders, stress management, and pediatric oncology support. Analysis of his recent publications reveals a strong trend toward integrating machine learning with virtual reality systems, developing novel game interfaces, and creating therapeutic applications for mental health conditions. His work spans technical computer graphics research, behavioral psychology studies, and practical healthcare implementations, demonstrating remarkable interdisciplinary reach. Dr. Hlavacs has collaborated extensively with medical researchers, particularly with Anna Felnhofer and Oswald D. Kothgassner on VR therapy applications, and with Amir Zaib Abbasi on consumer gaming behavior studies. His research has resulted in numerous serious games for healthcare applications, including systems for cancer patients, anxiety treatment, and vaccination communication. His laboratory work appears focused on developing the INTERACCT system for remote data entry by young leukemia patients, MindSpace for treating anxiety disorders in children, and various VR environments for therapeutic applications. Current projects indicate a strong emphasis on AI-driven game behavior, VR editor tools, and mobile gamification for behavioral change.

Lisa Finkelsteinمشاهده پروفایل

استاد

• Age and generation issues in the workplace
• Stigma in the workplace
• Mentoring relationships
• +۶ مورد دیگر

Lisa Finkelstein serves as a Professor in the Department of Psychology at Northern Illinois University, specializing in Social and Industrial/Organizational Psychology. Her research program investigates critical workplace dynamics including age-based discrimination, generational interactions, and organizational interventions for inclusive workplaces. With over 30 years of scholarly contributions since her 1996 Tulane University doctorate, she maintains active research leadership through the FinkLab while teaching core courses in social psychology and organizational behavior. Education Ph.D. in Psychology, Tulane University (1996) Professor Finkelstein's research centers on metastereotypes, age discrimination mechanisms, and mentoring effectiveness in multigenerational workplaces. She examines how implicit biases affect employment decisions, how humor functions as both coping mechanism and potential aggression vector, and the complex interplay between high-potential designation and leadership success. Her work bridges theoretical social psychology with practical organizational applications, particularly regarding cyber incivility impacts on older workers and Dark Tetrad personality influences on abusive supervision responses. Analysis of her 2020-2025 publications reveals intensifying focus on intersectional discrimination frameworks, with growing emphasis on pandemic-exacerbated age biases and methodological innovations for measuring implicit metastereotypes. Recent work demonstrates sophisticated integration of daily diary methodologies with traditional experimental designs, while maintaining consistent attention to practical HR implications through resources like her 2021 "Ageless Talent" framework for age-diverse workforce optimization. Scientific Awards No specific awards were documented in available materials Professor Finkelstein's mentoring scholarship directly informs her teaching of PSYC 617 (Individual Assessment) and PSYC 619 (Organizational Development), where she translates research on mentor-protégé efficacy crossover into classroom practice. Her extensive publication record in top journals like Personnel Psychology and Work, Aging and Retirement demonstrates sustained research productivity without mention of major external grants in available materials. She maintains active scholarly engagement through the Society for Industrial and Organizational Psychology (SIOP), contributing to special issues on generational workplace dynamics. She directs the FinkLab, which serves as the operational hub for her metastereotype research program. The lab employs mixed-methods approaches to investigate age-based workplace interactions, with particular focus on developing measurement tools like the word fragment completion task for metastereotype activation. Current lab activities appear centered on pandemic-era workplace adaptations and the Dark Tetrad's impact on abusive supervision responses.

• Human-Computer Interaction
• Sound Design
• Embodied Music Interaction
• +۳ مورد دیگر

Balandino Di Donato is a Lecturer in interactive audio at Edinburgh Napier University's School of Computing Engineering and the Built Environment. His research focuses on soundscapes in mountaineering environments and embodied human-computer interaction in music. He led AHRC-funded projects on Sound Design Pipeline for Cross-platform 360 Virtual Productions BSL in Embodied Music Interaction and chaired the Audio Mostly 2023 conference. Education includes a 2021 PhD from Royal Birmingham Conservatoire (Birmingham City University) in Designing Embodied Human-Computer Interactions in Music Performance . Prior academic roles featured collaborations with Goldsmiths (ERC BioMusic project), De Montfort University (Creative AI Dataset), and University of Leicester (INCITE project). Research spans Mountain soundscape analysis Accessible audio-visual-haptic systems Biosignal-driven musical instruments 360 audio design British Sign Language integration Interactive sound art installations Scientific achievements include Biennale awards (2018, 2019) Audio Mostly steering committee Conference chair and session roles EPSRC and AHRC grant reviewer

• Archaeology
• Digital Humanities
• 3D Modeling
• +۶ مورد دیگر

Chiara Piccoli is a Research Fellow and Data Scientist at the University of Amsterdam, holding dual appointments at the Faculty of Humanities' Department of Archaeology and the university's Data Science Centre. She also works at the 4D Research Lab where she applies computational methods to archaeological problems. Her research spans the intersection of archaeology and digital technologies, with particular expertise in 3D modeling, GIS mapping, and data visualization for historical contexts. She specializes in Classical Greek architecture and urban contexts, developing innovative methods for visualizing ancient cityscapes and architectural heritage through procedural generation techniques. Her recent publications demonstrate a strong focus on bridging traditional archaeological methods with advanced computational tools. The 2024 edited volume she contributed to explores space syntax, natural language processing, photogrammetry, and virtual reality applications for architectural heritage, reflecting her commitment to interdisciplinary approaches that transcend traditional disciplinary boundaries in heritage studies. Dr. Piccoli's technical expertise is evident in her development of CityEngine rule sets for GIS-driven symbology of survey finds and Classical Greek architecture, which she has made publicly available through GitHub repositories. Her work enables more intuitive analysis of architectural survey data and facilitates the creation of alternative reconstruction hypotheses for ancient urban environments.

Markus Tatzgernمشاهده پروفایل

استاد

• Augmented Reality
• Virtual Reality
• Mixed Reality
• +۳ مورد دیگر

Dr. Markus Tatzgern serves as Professor for Mixed Reality and Game Development and Head of Research at the Department for Creative Technologies, Salzburg University of Applied Sciences. He leads the Digital Realities Lab, a multi-disciplinary research group focused on human-centered solutions at the intersection of software, design, and creative engineering for technology interaction. His academic foundation includes a Master of Science and Doctorate with highest distinction from Graz University of Technology. He furthered his expertise through post-doctoral research at the Christian Doppler Laboratory for Handheld Augmented Reality, recognized as a world-leading facility in mobile AR. Tatzgern's research spans Augmented Reality, Virtual Reality, Mixed Reality, and Human-Computer Interaction with emphasis on practical applications. His work addresses critical challenges in view management, haptic feedback systems, industrial procedure visualization, medical imaging interfaces, and game development. Key contributions include novel techniques for eye-perspective rendering, breathing-based VR interaction, and latency compensation in medical robotics. His publication trajectory reveals evolving focus from foundational AR visualization (2010-2016) toward applied XR solutions in healthcare, industrial training, and user experience optimization (2017-2024). Recent work demonstrates increasing integration of physiological inputs, real-world safety applications, and enterprise-grade XR prototyping. Scientific recognition includes: Honorable Mention for Best Paper at CHI 2022 for 'AirRes Mask' breathing interface Honorable Mention for Best Paper at IEEE 3DUI 2017 for adaptive rendering techniques As Head of Research, Tatzgern actively shapes the field through program committee roles and peer review for top venues including ACM CHI and IEEE VR. His four patents in AR visualization demonstrate translational impact from academic research to practical applications. The Digital Realities Lab operates as an innovation hub where software engineers, designers, and creative technologists collaborate on next-generation interaction paradigms. Current projects emphasize medical XR applications, industrial training systems, and accessibility-focused AR solutions for vulnerable populations.

Sanjib Adhikaryمشاهده پروفایل

استاد

• Regional Anesthesia
• Pain Management
• Neuro Anesthesia
• +۴ مورد دیگر

Sanjib Adhikary, MBBS, MD is Professor of Anesthesiology and Perioperative Medicine at Penn State College of Medicine, serving as Chief of the Division of Regional Anesthesia & Acute Pain Management Service. He holds additional leadership roles as Director of Acute Pain, Regional Anesthesia and Orthopaedics, and Vice Chair of Research and Innovation. His clinical expertise spans Regional Anesthesia, Neuro Anesthesia, Orthopaedic Anesthesia, and Obstetric Anesthesia. Dr. Adhikary completed his medical education at Maharaja Krishna Chandra Gajapati Medical College (1997), followed by internships in Anesthesiology (2001-2002) and fellowships in Anesthesiology at London Health Sciences Center (2009) and Neuro Anesthesia at Toronto Western Hospital (2008). His research focuses on regional anesthesia techniques and pain management, with particular expertise in ultrasound-guided procedures and nerve blocks. Key research areas include erector spinae plane blocks (73% of his work), regional anesthesia (71%), pain management (55%), and thoracic wall procedures (36%). His work contributes to UN Sustainable Development Goals related to healthcare and well-being. Dr. Adhikary's recent publications demonstrate continued innovation in pain management protocols for cranial, chest wall, and orthopedic procedures. His research bridges clinical practice with evidence-based approaches to enhance perioperative outcomes. 82 total publications (2005-2024) 4,220 total citations h-index of 23 Significant social media engagement (256 X users for most popular publication) 87 Mendeley readers for highest-impact work As Vice Chair of Research and Innovation, he mentors junior faculty and residents while advancing Penn State's research portfolio in anesthesia. His leadership has established the institution as a center of excellence in regional anesthesia techniques and acute pain management protocols.

Jonathan Ansonمشاهده پروفایل

دانشیار

• Anesthesiology
• Interventional Pain Management
• Obstetric Anesthesia
• +۲ مورد دیگر

Jonathan Anson, MD is an Associate Professor in the Department of Anesthesiology and Perioperative Medicine at Penn State College of Medicine. He serves as Clinical Curriculum Director for the Residency Program and provides specialized patient services including Acute/Regional Pain, General Anesthesia, Obstetric Anesthesia, and Outpatient Anesthesia. His clinical practice is affiliated with Penn State Health. Education : Jefferson Medical College of Thomas Jefferson University (MD, 2005) Training : Transitional Internship at Mercy Medical Center (2006), Anesthesiology Residency at University of Pennsylvania Medical Center (2009) Dr. Anson's research focuses on critical areas of anesthesiology including interventional pain management , obstetric anesthesia , drug-drug interactions , and perioperative safety . His work has been published in journals like the Journal of Clinical Anesthesia and International Journal of Obstetric Anesthesia, with studies on topics such as back pain in anesthesia providers, management of elevated intracranial pressure in obstetric patients, and anesthesia protocols for interventional procedures. Notable trends in his publications include: Development of standardized protocols for interventional pain management Analysis of occupational health risks in anesthesia providers Optimization of anesthesia techniques for neurosurgical and obstetric applications Investigation of pharmacological interactions affecting surgical outcomes Improvement of clinical education through case-based learning Advancement of patient safety measures in perioperative care