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LiDAR mapping of ground damage in a heading re-orientation case study

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International Journal of Mining Science and Technology 2021年第1期31卷 67-74页

作者： Nicole Evanek Brent Slaker anthony Iannacchione Tim Miller National Institute for Occupational Safety and Health Pittsburgh Mining Research DivisionPittsburghPA 15236USA University of Pittsburgh PittsburghPA 15260USA East Fairfield Coal Company North LimaOH 44452USA

The Subtropolis Mine is a room-and-pillar mine extracting the Vanport limestone near Petersburg,Ohio,*** February of 2018,mine management began implementing a heading re-orientation to better control the negative effects of excessive levels of horizontal *** conditions in the headings improved,but as expected,stress-related damage concentrated within *** mine operator has worked to lessen the impact of the instabilities in the outby crosscuts by implementing several engineering *** the implementation of each control,conditions were monitored and analyzed using observational and measurement techniques including 3D LiDAR *** the heading re-orientation,several 3D LiDAR surveys have been conducted and analyzed by researchers from the National Institute for Occupational Safety and Health(NIOSH).This study examines(1)the characteristics of each 3D LiDAR survey,(2)the change in the detailed strata conditions in response to stress concentrations,and(3)the change detection techniques between 3D LiDAR surveys to assess entry ***,the 3D LiDAR surveys proved to be a useful tool for characterizing ground instability and assessing the effectiveness of the engineering controls used in the heading re-orientation at the Subtropolis Mine.

关键词： Ground control Limestone Horizontal stress Stress control layout Crosscut Windows

Mobile robot position control in environment with static obstacles

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IET Cyber-Systems and Robotics 2020年第2期2卷 78-87页

作者： Konstantinos Giannousakis anthony Tzes Electrical&Computer Engineering Department University of PatrasRio 26500Greece Electrical&Computer Engineering Program New York University Abu DhabiAbu DhabiP.O.Box 129188United Arab Emirates

This study addresses the problem of efficiently navigating a differential drive mobile robot to a target pose in a region with obstacles,without explicitly generating a *** robot is assumed to be equipped with an omnidirectional range sensor,while the region may or may not be a priori *** the known obstacles in each iteration of the controller,the shortest path connecting the robot and the target point provides a raw desired movement *** the unobstructed area in that direction,the size of the robot and the obstacle contours in its visibility range,the reference direction is ***,respecting the velocity and acceleration constraints of the robot,the angular velocity is properly selected to rotate the robot towards the reference direction,while the linear velocity is chosen to efficiently minimise the distance to the final target,as well as to avoid *** the robot has reached the target,the controller switches to orientation mode in order to fix the *** studies demonstrate the effectiveness of the algorithm.

关键词： robot visibility shortest

Distributed control of mobile robots in an environment with static obstacles

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IET Cyber-Systems and Robotics 2021年第2期3卷 128-139页

作者： Konstantinos Giannousakis anthony Tzes Electrical&Computer Engineering Department University of PatrasRioGreece Electrical&Computer Engineering Program New York University Abu DhabiAbu DhabiUnited Arab Emirates

This study addresses the problem of deploying a group of mobile robots over a nonconvex region with *** that the robots are equipped with omnidirectional range sensors of common radius,disjoint subsets of the sensed area are assigned to the *** proximity-based subsets are calculated using the visibility notion,where the cell of each robot is treated as an opaque obstacle for the other *** on that,optimal spatially distributed coordination algorithms are derived for the area coverage problem and for the homing problem,where the swarm needs to move to specific *** studies demonstrate the results.

关键词： robot mobile visibility

Microglia Research in the 100th Year Since Its Discovery

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Neuroscience Bulletin 2020年第3期36卷 303-306页

作者： anthony DUmpierre Long-Jun Wu Department of Neurology Mayo ClinicRochesterMN 55905USA Department of Neuroscience Mayo ClinicJacksonvilleFL 32224USA Department of Immunology Mayo ClinicRochesterMN 55905USA

In 1919,Pio del Rio-Hortega first described a class of cells residing in the brain with a tiny soma and branched architecture distinguishable from astrocytes and *** cells,called microglia or mesoglia,have come to be appreciated as resident immune cells in the central nervous system(CNS).In the year 2019,we review the three most recent advances in microglia research in this 100th year since their discovery(Fig.1).We first discuss their transcriptional diversity,which allows us to appreciate the heterogeneity of microglia across species,development,diseases,and brain *** also highlight recent stem cell-based approaches that allow us to study human microglia.

关键词： diseases glia appreciate

Pancreatic sphincterotomy:Technique,indications,and complications

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World Journal of Gastroenterology 2007年第30期13卷 4064-4071页

作者： Jonathan M Buscaglia anthony N Kalloo Division of Gastroenterology and Hepatology Johns Hopkins University School of Medicine Johns Hopkins Hospital Baltimore MD 21205 United States

Pancreatic sphincterotomy serves as the cornerstone of endoscopic therapy of the pancreas. Historically, its indications have been less well-defined than those of endoscopic biliary sphincterotomy, yet it plays a definite and useful role in diseases such as chronic pancreatitis and pancreatic-type sphincter of Oddi dysfunction. In the appropriate setting, it may be used as a single therapeutic maneuver, or in conjunction with other endoscopic techniques such as pancreatic stone extraction or stent placement. The current standard of practice utilizes two different methods of performing pancreatic sphincterotomy: a pull-type sphincterotome technique without prior stent placement, and a needle-knife sphincterotome technique over an existing stent. The complications associated with pancreatic sphincterotomy are many, although acute pancreatitis appears to be the most common and the most serious of the early complications. As such, it continues to be reserved for those endoscopists who perform a relatively high-volume of therapeutic pancreaticobiliary endoscopic retrograde cholangio-pancreatography.

关键词： Pancreas Sphincterotomy Endoscopic Technique Indications Complications

Endoscopic ultrasonography guided celiac plexus neurolysis and celiac plexus block in the management of pain due to pancreatic cancer and chronic pancreatitis

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World Journal of Gastroenterology 2007年第26期13卷 3575-3580页

作者： anthony J Michaels Peter V Draganov University of Florida Department of GastroenterologyHepatology and NutritionUnited States

Pain is a common symptom of pancreatic disease and is frequently difficult to manage. Pain relief provided by narcotics is often suboptimal and is associated with significant side effects. An alternative approach to pain management in pancreatic disease is the use of celiac plexus block (CPB) or neurolysis (CPN). Originally performed by anesthesiologists and radiologists via a posterior approach,recent advances in endoscopic ultrasonography (EUS) have made this technique an attractive alternative. EUS guided celiac plexus block/ neurolysis is simple to perform and avoids serious complications such as paraplegia or pneumothorax that are associated with the posterior approach. EUS guided CPN should be considered first line therapy in patients with pain due to pancreatic cancer. It provides superior pain control compared to traditional management with narcotics. A trend for improved survival in pancreatic cancer patients treated with CPN has been reported,but larger studies are needed to confirm this finding. At this time,the use of EUS guided CPB cannot be recommended as routine therapy for pain in chronic pancreatitis since only one-half of the patients experience pain reduction and the beneficial effect tends to be short lived. EUS guided CPB and CPN should be used as part of a multidisciplinary team approach for pain management.

关键词： Celiac plexus Celiac plexus neurolysis Celiacplexus block Endoscopic ultrasound Pain management

What we have learned from randomized trials of prostate cancer screening

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Asian Journal of Andrology 2011年第3期13卷 369-373,510页

作者： Richard M Hoffman anthony Y Smith Medicine Service New Mexico VA Health Care System Albuquerque NM 87108 USA Department of Medicine University of New Mexico School of Medicine Albuquerque NM 87108 USA Department of Surgery University of New Mexico School of Medicine Albuquerque NM 87108 USA

The introduction of prostate-specific antigen （PSA） for prostate cancer screening in the late 1980s led to an epidemic of prostate cancer, particularly in developed countries. However, the first valid reports from randomized controlled trials on the efficacy of screening were not published until 2009. Men in the screening group in the European Randomized Study of Screening for Prostate Cancer were 20% less likely than those in the control group to die from prostate cancer. The absolute difference was only 0.7/1000, implying that over 1400 men needed to be screened to prevent one prostate cancer death. Screening was also associated with a 70% increased risk for being diagnosed with prostate cancer. The American Prostate, Lung, Colorectal, and Ovarian Cancer Screening Trial found no survival benefit for screening. Results were not conclusive because a substantial proportion of study subjects had previously undergone PSA testing, over half of the control group had PSA testing, follow-up was relatively short, and fewer than 100 subjects died from prostate cancer. Balancing the potential survival benefit from screening is the risk of overdiagnosis--finding cancers that would not otherwise cause clinical problems^and the risk of treatment complications, including urinary, sexual and bowel dysfunction. Prostate cancer screening efforts would benefit from improved biomarkers, which more readily identify clinically important cancers. Cancer control efforts might also need to include chemoprevention, though currently available agents are controversial. In the meantime, oatients need to be supoorted in achievine informed decisions on whether to be screened for orostate cancer.

关键词： cancer screening prostate-specific antigen prostatic neoplasms randomized controlled trials as topic

Pancreatic cancer:A model cancer for the study of the therapeutic effects of anticoagulants

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World Journal of Gastrointestinal Oncology 2009年第1期1卷 38-40页

作者： anthony Maraveyas The Queen's Centre for Oncology and Haematology Hull and York Medical SchoolCastle Hill Hospital

Cancer-related thromboembolic disease is a well recognized syndrome since first described by Armand Trousseau in *** the morbidity and mortality related to thromboembolism in these patients is becoming a priority research area with the advent of new *** is only recently that randomized trials of improved quality are been undertaken to study this *** of these trials however are still not accounting for the heterogeneity of "cancer" in terms of anatomical site,histology,stage and *** editorial review highlights why pancreatic cancer may serve as a model malignancy to study this question.

关键词： Pancreatic Cancer Vascular Thromboembolism Vascular thromboembolic disease Heparin Anticoagulants

A Systematic Study of Disaster Risk in Brunei Darussalam and Options for Vulnerability-Based Disaster Risk Reduction

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International Journal of Disaster Risk Science 2017年第2期8卷 208-223页

作者： anthony Banyouko Ndah John Onu Odihi Environmental Studies Program Department of Geography and DevelopmentFaculty of Arts and Social ScienceUniversiti Brunei Darussalam Faculty of Social Sciences Department of GeographyUniversity of Maiduguri

This systematic study of disaster risk and disaster management efforts in Brunei Darussalam uncovers the reasons why floods and landslides in particular continue to inflict significant social,economic,and psychological *** to the impacts of hydro-meteorological hazards continue to rise despite international awareness and improved disaster governance and information,and regardless of the vast financial and material resources spent on structural and nonstructural measures for disaster relief and community *** premise is that,a poor diagnosis of the disaster risk issue is at the root of the disaster risk dilemma in Brunei *** conducted our vulnerability-centered disaster risk assessment based largely on the Pressure and Release(PAR) Model proposed by Wisner et *** research results reveal that:(1)Hazard-risk in Brunei is high due to the impact of global climate change,the country's local geography,and Brunei's relative location in the Asia–Pacific *** reporting of localized disasters to international databases however fuels the misperception of low disaster risk in Brunei;(2) High community vulnerability and disaster risk is due to limited knowledge,awareness,and motivation among the general population,which prevents effective mitigation and adaptation to low magnitude but recurrent hazardous events;and(3) Partial incorporation of disasterrisk reduction into governance structures and development plans contributes to heightened disaster *** frameworks are proposed that can minimize social vulnerability,reduce disaster risk,and enhance community resilience and adaptive capacity as part of a strengthened governance *** with improvements in preparedness,response,recovery,and reconstruction promoted by the National Disaster Management Centre(NDMC),vulnerability and disaster risk can be minimized,and a more inclusive and sustainable growth can be generated.

关键词： Brunei Darussalam Community vulnerability Disaster risk reduction Pressure and Release Model(PAR)