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Zemotel, Linda M., und David K. Montebello. „Interregional Corridors: Prioritizing and Managing Critical Connections Between Minnesota’s Economic Centers“. Transportation Research Record: Journal of the Transportation Research Board 1817, Nr. 1 (Januar 2002): 79–87. http://dx.doi.org/10.3141/1817-10.
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Growth trends in Minnesota emphasize the need to ensure that travel on highway corridors linking regional trade centers in the state is safe, reliable, and efficient. In 1999, the Minnesota Department of Transportation initiated an interregional corridor study to define a system of interregional corridors that connect important regional trade centers. Minnesota’s effort to develop the interregional corridor system, performance expectations, and principles and policies for managing and guiding development along these corridors is described. The interregional corridor system and the corresponding management principles and policies were developed in several phases: ( a) definition of regional trade centers, ( b) identification of the interregional corridor system, ( c) development of interregional corridor principles and policies, and ( d) development of a corridor management plan guide. The study developed performance measures and performance targets to identify mobility risk corridors, which are corridors that perform below target speed or have a risk of signal proliferation. Methods used at a sketch-planning level to identify priority routes and performance levels are described. The study developed a more uniform process for developing corridor management plans.
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Espadas, Irene, Thomas W. Maddox und Felipe de Vicente. „Optimal safe implantation corridors in feline cervical vertebrae (C2–T1): CT study in 16 domestic shorthair cats“. Journal of Feline Medicine and Surgery 20, Nr. 12 (19.02.2018): 1149–57. http://dx.doi.org/10.1177/1098612x18757592.
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Objectives The objective of this study was to define safe corridors for the optimal placement of bicortical implants in the feline cervical spine (C2–T1) using CT. Methods CT images of feline cervical spines (n = 16) were reviewed retrospectively. Multiplanar reconstructions were used to define the optimal safe corridors. Safe corridors were defined by their angle of insertion, width and length. The insertion point within the vertebral body was also described. Vertebral measurements were compared between vertebrae using multilevel linear regression, and left and right measurements within vertebrae were compared with the paired samples Wilcoxon signed-rank test. A P value <0.05 was considered significant for all analyses. Results The safe corridor insertion points were located within the caudal third of the vertebral body in C2 (mean cranial vertebral ratio 0.73) and in the cranial third of the vertebral bodies from C3–T1 (mean cranial vertebral ratios 0.34–0.38). Mean safe corridor widths ranged from 1.04 mm in C2 to 2.30 mm in C7 and T1. The mean right and left optimal angles of implantation were, respectively, 21.79° and 21.49° for C2, 45.26° and 46.19° for C3, 51.48° and 51.04° for C4, 53.52° and 54.30° for C5, 56.36° and 56.65° for C6, 63.40° and 64.92° for C7, and 53.90° and 52.90° for T1. There were statistically significant differences between vertebrae in almost every measurement. Conclusions and relevance Cervical vertebral safe corridors in cats are narrow and differ to those reported in dogs. Safe corridors are located in the caudal third of C2 and cranial third of the C3–T1 vertebral bodies. Current recommendations for implant sizes should be reviewed, as 1.5–2 mm implants would be oversized for bicortical implantation in most of the feline cervical vertebrae.
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Ma, Zhaowei, Zhongming Wang, Aitong Ma, Yunzhuo Liu und Yifeng Niu. „A Low-Altitude Obstacle Avoidance Method for UAVs Based on Polyhedral Flight Corridor“. Drones 7, Nr. 9 (19.09.2023): 588. http://dx.doi.org/10.3390/drones7090588.
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UAVs flying in complex low-altitude environments often require real-time sensing to avoid environmental obstacles. In previous approaches, UAVs have usually carried out motion planning based on primitive navigation maps such as point clouds and raster maps to achieve autonomous obstacle avoidance. However, due to the huge amount of data in these raw navigation maps and the highly discrete map information, the efficiency of solving the UAV’s real-time trajectory optimization is low, making it difficult to meet the demand for efficient online motion planning. A flight corridor is a series of unobstructed continuous areas and has convex properties. The flight corridor can be used as a simple parametric representation to characterize the safe flight space in the environment, and used as the cost of the collision term in the trajectory back-end optimization for trajectory solving, which can improve the efficiency of real-time trajectory solving and ensure flight safety. Therefore, this paper focuses on the construction of safe flight corridors for UAVs and autonomous obstacle avoidance algorithms for UAVs based on safe flight corridors, based on a rotary-wing UAV platform, and proposes a polyhedral flight corridor construction algorithm and realizes autonomous obstacle avoidance for UAVs based on the constructed flight corridors.
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Harper, Tisha, Stephen Joslyn, Julia Whittington, Devon Hague, Mark Mitchell, David Schaeffer und Clara Moran. „Computed tomographic study of safe implantation corridors in rabbit lumbar vertebrae“. Veterinary and Comparative Orthopaedics and Traumatology 30, Nr. 05 (2017): 357–63. http://dx.doi.org/10.3415/vcot-17-01-0009.
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Summary Objectives: A study was performed to evaluate the lumbar vertebrae of domestic rabbits using computed tomography (CT) in order to identify safe corridors for implant insertion. Methods: Computed tomography imaging of 20 adult New Zealand white rabbits was evaluated using three-dimensional multi -planar reconstruction, and safe corridors were determined. Following corridor determination, implant placement was performed, and imaging was repeated. Results: The cranial and caudal endplates contained the majority of the vertebral bone stock, and were an average of 3.14 and 3.30 mm in length, respectively. The mean safe corridor angle was 62.9 degrees (range: 58.8–66.7), and the mean width of the corridor was 2.03 mm (range: 1.60– 2.07). Post-placement imaging revealed that 35% of the pins demonstrated errors of placement, most commonly canal impingement. Conclusions: The results of the corridor evaluation indicate that an insertion angle of approximately 60 degrees relative to the sagittal midline is appropriate for implant insertion in the lumbar vertebrae of New Zealand white rabbits. Additionally, due to the hourglass shape of rabbit vertebrae, the endplates provide maximal bone stock for implant purchase, so insertion should be attempted in these regions. However, the high percentage of errors in placement indicate the need to more clearly define entry points to access the canal, and highlight the challenges of appropriate placement in the small bones of rabbits.
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Prause, Gunnar. „A Green Corridor Balanced Scorecard“. Transport and Telecommunication Journal 15, Nr. 4 (19.12.2014): 299–307. http://dx.doi.org/10.2478/ttj-2014-0026.
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AbstractGreen transport corridors represent trans-shipment routes with a concentration of freight traffic between major hubs and long distances of transport marked by reduced environmental and climate impact. Important characteristics of green corridors are their network structures, their transnational character and their high involvement of public and private stakeholders, including political level requiring new governance models. Network-oriented controlling of green transport corridors require new concepts and instruments concentrating on multi-dimensional evaluation of collective strategies and processes in an international environment with a focus on cross-company aspects.Until now the scientific discussion focusses on different sets of Key Performance Indicators (KPI) for monitoring and management of green corridors, which mainly cover sustainable aspects of green corridor development by neglecting a network-oriented controlling approach so that a general concept for green corridor controlling is still missing. The current KPI approaches emphasize the operational aspects of the corridor performance so that a strategic management control system is needed to safeguard an efficient, innovative, safe and environmental friendly long-term development.The paper will present and discuss a management control system for green supply chains based on the balanced scorecard concept and link the ongoing scientific discussion to recent research results about green corridor management. The presented green corridor balanced scorecard tries to solve the strategic weakness of the existing green corridor controlling approaches by integrating cooperative and network-oriented concepts from supply chain management.
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Ranjbar, Mansour, Ali Tavakoli Kashani, Mohammad Mehdi Besharati, Moslem Azizi Bondarabadi, Hormoz Zakeri, Seyedali Hosseinizadeh, Gregory Chambers, Lori Mooren und Ray Shuey. „Adopting a Safe System Approach to Determine Safer Speed Limits: A Case Study from Iran“. Journal of Road Safety 33, Nr. 1 (09.02.2022): 26–34. http://dx.doi.org/10.33492/jrs-d-21-00045.
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Speed management is one of the main dimensions of the Safe System Approach for reducing both the risk of crash involvement as well as injury severity. This study proposes a practical framework for setting safer speed limits on duplicated rural highways that has been applied to six pilot corridors (total carriageway length of approximately 1,250 km) in Iran. The safer speed limits determined from the proposed framework have been compared with the currently posted speed limits using several indicators and showed a considerable reduction in the total number of changes in speed limits while having very limited impact on reducing the mean travel speed and increase travel time along the study corridors. The study of the pilot corridors establishes that a clear approach and documented guidelines for setting speed limits provides a basis for quantifying engineering judgments about road hazards and determining more consistent speed limit values for similar conditions across Iran’s rural highway network, legitimising speed limit reductions aimed at saving
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Nguyen, Thai Binh, Manzur Murshed, Tanveer Choudhury, Kathleen Keogh, Gayan Kahandawa Appuhamillage und Linh Nguyen. „A Depth-Based Hybrid Approach for Safe Flight Corridor Generation in Memoryless Planning“. Sensors 23, Nr. 16 (16.08.2023): 7206. http://dx.doi.org/10.3390/s23167206.
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This paper presents a depth-based hybrid method to generate safe flight corridors for a memoryless local navigation planner. It is first proposed to use raw depth images as inputs in the learning-based object-detection engine with no requirement for map fusion. We then employ an object-detection network to directly predict the base of polyhedral safe corridors in a new raw depth image. Furthermore, we apply a verification procedure to eliminate any false predictions so that the resulting collision-free corridors are guaranteed. More importantly, the proposed mechanism helps produce separate safe corridors with minimal overlap that are suitable to be used as space boundaries for path planning. The average intersection of union (IoU) of corridors obtained by the proposed algorithm is less than 2%. To evaluate the effectiveness of our method, we incorporated it into a memoryless planner with a straight-line path-planning algorithm. We then tested the entire system in both synthetic and real-world obstacle-dense environments. The obtained results with very high success rates demonstrate that the proposed approach is highly capable of producing safe corridors for memoryless local planning.
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Wicaksono, Agung Wahyu, Imam Sonhaji und Darmawanta Sembiring. „Penerbangan dan Wisata: Travel Bubble dan Koridor Transportasi di Masa Pandemi“. Jurnal Manajemen Transportasi & Logistik (JMTRANSLOG) 9, Nr. 2 (23.03.2023): 101. http://dx.doi.org/10.54324/j.mtl.v9i2.570.
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The purpose of this study is to examine Indonesia's readiness in implementing the Travel Bubble, map which countries are most appropriate for a travel bubble based on the covid case that occurs and to map safe transportation corridors to leading tourist destinations in Indonesia. The research method used is qualitative research method by describing statistical data to draw conclusions, the data used are secondary data published by related organizations and previous research data related to this research. The results of this study explain that Indonesia is still not ready for the existing conditions, it needs other adjustments, while the best countries for a travel bubble with Indonesia are China, Singapore, the Netherlands and Saudi Arabia. Covid-19 free transportation corridors that can be mapped are the Yogyakarta - Bali - Lombok - Komodo Island corridor, the Bali - Toraja corridor via Makassar and the Bali - Raja Ampat corridor via Biak
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Eby, Adam, Peter Early, Simon Roe, Karl Kraus, Yuan Lingnan und Jonathan Mochel. „Computed Tomographic Evaluation of Mid-thoracic Vertebral Corridors in Normal French Bulldogs“. European Journal of Veterinary Medicine 2, Nr. 1 (01.02.2022): 1–3. http://dx.doi.org/10.24018/ejvetmed.2022.2.1.21.
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Objectives: (1) To report internal measurements of thoracic vertebral bone morphology and (2) identify safe and clinically applicable surgical implant corridors in the T7-T9 thoracic vertebrae of French Bulldogs.
Study Design: Observational, cross‐sectional, descriptive study.
Sample Population: Seven client-owned French Bulldogs with normal thoracic vertebrae.
Methods: Computed tomographic (CT) studies of normal French Bulldogs were reviewed. Multiplanar reconstruction of the CT images was used to determine thoracic vertebral corridors. Corridor measurements included the width, length, insertion distance off midline, and angle off midline (sagittal) for each thoracic vertebra. One‐way analysis of variance was used to detect differences between groups.
Results: Measurements of vertebral corridor width (p>0.9848), length (p>0.8113), implant center (p>0.9282) and angle (p>0.3609) did not differ between each vertebra. The average vertebral corridor width was 4.5 ± 0.7 mm. The average corridor length was 17.2 ± 2.5 mm. The average corridor angle was 22.3 ± 1.9 °. The mean distance the proposed implant center was from the vertebral midline was 8.2 ± 1.1 mm. Inter-observer agreement of corridor length and implant center was good but poor for corridor angle and width.
Conclusion: Based on average corridor width and length, commercially available cortical screws or pins can be utilized for implants in this region of the thoracic spine. The angle of corridor trajectory from a dorsal approach seems most applicable for T7-T9.
Clinical Significance: Vertebral corridors can be measured using CT-MPR, and implant specifications and angles derived. Surgical guides can also be created to guide implant placement. This approach provides a simple and accurate method to guide the placement of thoracic vertebral implants.
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Vignesh, R., M. Javed, SubbaChandra Balaji, C. Premanand, SyedAshfaque Zakki und C. Rex. „Safe corridors for K-wiring in phalangeal fractures“. Indian Journal of Orthopaedics 49, Nr. 4 (2015): 388. http://dx.doi.org/10.4103/0019-5413.159591.
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Sharma, Pulak, Rahul Verma und Sanjiv Gaur. „Safe corridors for K-wiring in phalangeal fractures“. Indian Journal of Orthopaedics 50, Nr. 1 (2016): 108. http://dx.doi.org/10.4103/0019-5413.173505.
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Lei, Yang, Chengfeng Huang und Yuan Wu. „Operational Risk Assessment for International Transport Corridor: A Case Study of China-Pakistan Economic Corridor“. Discrete Dynamics in Nature and Society 2019 (04.03.2019): 1–7. http://dx.doi.org/10.1155/2019/5730746.
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The international transport corridor is the basis and carrier of economic and trade exchanges between countries and regions. International transport corridors span different countries and regions, coupled with the long distance, complicated transportation environment and process, which determines the potential risks of the operation of the transport corridors. Therefore, accurately identifying and assessing the risk of international channels are an important prerequisite for ensuring its safe and stable operation. The expert scoring method is used to collect the basic data of risk identification, and the hesitant fuzzy decision theory is introduced. The dependent linguistic ordered weighted geometric (DLOWG) operator and the Failure Mode and Effect Analysis (FMEA) method are used in combination. Taking the China-Pakistan Economic Corridor (CPEC) as an example, evaluate the operational risks of the international transport corridor. The research results show that corruption, terrorism, and policy stability are the top three risk factors in the operation of the China-Pakistan transport corridor. The risk management and control should focus on these three types of risks and strengthen the security management along the route. Strengthen policy docking and communication, maintain political stability, and strengthen antiterrorism cooperation.
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Kim, Younsil, und Joongwon Bae. „Risk-Based UAV Corridor Capacity Analysis above a Populated Area“. Drones 6, Nr. 9 (24.08.2022): 221. http://dx.doi.org/10.3390/drones6090221.
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To integrate unmanned aerial vehicles (UAVs) into the national airspace in a safe manner, a risk-based approach to the regulation of UAVs is adopted in many countries. Thus, the capacity to permit UAVs in urban airspace also needs to be evaluated in a risk-based sense. In this regard, this paper proposes a methodology to analyze the capacity of UAV corridors on the basis of third-party risk on the ground. By linking the collision rate of the corridor and the failure rates of UAVs with the number of fatalities on the ground, the capacity of the UAV corridor is derived to satisfy the target level of safety. To model the collision rate of UAVs in the corridor, the Reich collision risk model is utilized. Moreover, a ground risk map is generated to compute the third-party risk on the ground using the databases for Seoul, Korea. The results show that the failure rate of UAVs is the dominant factor for determining the capacity of the corridor, even if the number of corridors increases. The proposed methodology could be useful to manage the number of flights for applications where the UAV corridor is fixed and flight continues, such as package delivery.
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Bedu, A. S., M. Manassero, V. Viateau, G. Niebauer, P. Moissonnier und R. Vallefuoco. „Computed tomographic study of the optimal safe implantation corridors in feline thoraco-lumbar vertebrae“. Veterinary and Comparative Orthopaedics and Traumatology 26, Nr. 05 (2013): 372–78. http://dx.doi.org/10.3415/vcot-12-10-0127.
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SummaryObjective: To define the implantation corridors in feline thoraco-lumbar vertebrae (T10-L7) using computed tomography (CT) for optimal safe placement of the implants (screws/pins) in spinal column stabilization.Study design: Computed tomographic study.Materials and methods: Computed tomography images of feline spinal column (n = 10) were used to define the optimal safe implantation corridors (OSIC) in the transverse plane. The OSIC were defined as corridors allowing the greatest amount of bone purchase with safe margins for implantation of the bicortical implants. They were characterized by their insertion point, optimal angle (from the midsagital plane), maximum and minimum safe angles (from the same insertion points), length, and width.Results: The OSIC are located within the vertebral bodies. Insertion points were situated at the level of the vertebro-costal joint or the base of the transverse process of the vertebral body for thoracic and lumbar vertebrae, respectively. The mean optimal angle of the OSIC was 90.2° with a maximum deviation angle from optimal angle of 10° dorsally and 8.8° ventrally in thoracic vertebrae, and 90.5° with a maximum deviation angle from the optimal angle of 8.4° dorsally and 7.6° ventrally in lumbar vertebrae.Conclusion and clinical relevance: Corridors drilled in the vertebral body perpendicular to the midsagital plane (90°) or with a small angle (≤10°) of deviation from the optimal angle provide an optimal safe placement of bicortical implants. However, perpendicular implant placement may not always be feasible due to surrounding soft tissue structures.
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Chen, Yi Zhou, Si Jing Cai und Yun Feng Deng. „Simulation Study on Main Affect Factors to the Evacuation Corridor“. Applied Mechanics and Materials 170-173 (Mai 2012): 3533–38. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.3533.
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The primary goal of emergency evacuation for pedestrians is evacuating as many people as possible to safe areas in a shortest time when the accident occurred. And the primary factor of pedestrian evacuation is egress. According to the literature, we can know that the reasonable design of the evacuation corridor and the right guidance to pedestrians are very important, and analyzed main affect factors to the evacuation corridor, which affect of the evacuation speed for corridor at different pedestrian flows intensity, the width of evacuation corridor, setting canalization to corridor and the size of space of corridor peripheral. This paper use VISSIM simulation software to study on pedestrian flows evacuation. So the formulation for pedestrian evacuation program should consider a variety of elements for the design of the evacuation egress and corridors to increase efficiency and reliability for pedestrian evacuation.
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Голкин, А. В., В. Г. Шамонин, С. А. Зуев und С. Ю. Хатунцева. „DESIGN OF EMERGENCY EXITS IN BUILDINGS WITH ELLIPTICAL CORRIDORS. RESEARCH DESIGN“. Актуальные вопросы пожарной безопасности, Nr. 2(20) (22.05.2024): 6–12. http://dx.doi.org/10.37657/vniipo.avpb.2024.96.61.001.
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Рассмотрена возможность решения задачи оптимального расположения эвакуационных выходов (ЭВ) в коридорах эллиптического типа при максимальной удаленности ЭВ друг от друга, минимизирующей смешение людских потоков (и, соответственно, паники) при эвакуации в случае пожара или других чрезвычайных ситуаций. Рассматривалось расположение ЭВ по обеим сторонам коридора, в торцах которого имеется хотя бы один ЭВ, ведущий на лестничную клетку или в безопасную зону. Предложена последовательность шагов для реализации поставленной задачи – нахождению оптимальной конфигурации заданного числа ЭВ на обеих сторонах коридора. There was considered the possibility of solving the problem of emergency exits (EE) optimal location in elliptical corridors with the maximum distance of EEs from each other, minimizing the mixing of human flows (and, accordingly, panic) during evacuation in case of fire or other emergencies. There was examined the location of EE on both sides of the corridor, with at least one EE at the end of the corridor leading to a staircase or safe area. A sequence of steps was proposed to implement the task – to find the optimal configuration of a given number of EEs on both sides of the corridor.
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Oniang'o, Ruth. „How safe is our water food?“ African Journal of Food, Agriculture, Nutrition and Development 21, Nr. 5 (06.07.2021): 1. http://dx.doi.org/10.18697/ajfand.100.ed101.
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I wish to use my editor’s note for issue 100 to celebrate a friend I have known for decades, as we met through the corridors of various global conferences and discourses, discussing various aspects of nutrition. One could tell from her names that she was a blend and very global. I had no idea as to who was likely to win the coveted World Food Prize 2021 and was pleasantly surprised to learn of Dr. Shakuntala Haraksingh Thilsted’s huge achievement.
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Leblond, Guillaume, Luis Gaitero, Noel Moens, Alex zur Linden, Fiona James, Gabrielle Monteith und John Runciman. „Computed Tomographic Analysis of Ventral Atlantoaxial Optimal Safe Implantation Corridors in 27 Dogs“. Veterinary and Comparative Orthopaedics and Traumatology 30, Nr. 06 (2017): 413–23. http://dx.doi.org/10.3415/vcot-17-03-0046.
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Abstract Objectives Ventral atlantoaxial stabilization techniques are challenging surgical procedures in dogs. Available surgical guidelines are based upon subjective anatomical landmarks, and limited radiographic and computed tomographic data. The aims of this study were (1) to provide detailed anatomical descriptions of atlantoaxial optimal safe implantation corridors to generate objective recommendations for optimal implant placements and (2) to compare anatomical data obtained in non-affected Toy breed dogs, affected Toy breed dogs suffering from atlantoaxial instability and non-affected Beagle dogs. Methods Anatomical data were collected from a prospectively recruited population of 27 dogs using a previously validated method of optimal safe implantation corridor analysis using computed tomographic images. Results Optimal implant positions and three-dimensional numerical data were generated successfully in all cases. Anatomical landmarks could be used to generate objective definitions of optimal insertion points which were applicable across all three groups. Overall the geometrical distribution of all implant sites was similar in all three groups with a few exceptions. Clinical Significance This study provides extensive anatomical data available to facilitate surgical planning of implant placement for atlantoaxial stabilization. Our data suggest that non-affected Toy breed dogs and non-affected Beagle dogs constitute reasonable research models to study atlantoaxial stabilization constructs.
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He, Rui-Zhi, Yuan-Long Zhang, Lu-Lua Liu, Guo-Jian Tang und Wei-Min Bao. „Feasible footprint generation with uncertainty effects“. Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, Nr. 1 (31.08.2017): 138–50. http://dx.doi.org/10.1177/0954410017728971.
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Landing footprint is critical in generating feasible entry trajectories for hypersonic glide vehicles. In this paper, a new landing footprint generation algorithm that considers multiple uncertainty effects is proposed, based on the improved 3D acceleration profile planning method. First, a new entry corridor with uncertainty effects is derived, in which the angle of attack profile is adjustable at any time during the entire flight. Second, the longitudinal drag profile is designed as the interpolation results of the upper and lower fitting safe boundaries. The corresponding lateral lift-to-drag corridor is obtained using the quasi-equilibrium glide condition. A combined Proportion Integration Differentiation (PID) tracker is used to follow the planned profiles in the longitudinal and lateral corridors, and the feasible entry trajectories are completed. Finally, feasible footprint is generated by repeatedly computing the reachable boundaries for all the profiles in the new safe corridor, as well as the analytical calculation of the maximum range point. The approach is tested using the Common Aero Vehicle-H model. Simulation results demonstrate that the proposed algorithm can rapidly generate a feasible footprint of entry for vehicles while satisfying all the path and terminal constraints.
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Corvino, Sergio, Pedro L. Villanueva-Solórzano, Martina Offi, Daniele Armocida, Motonobu Nonaka, Giorgio Iaconetta, Felice Esposito, Luigi Maria Cavallo und Matteo de Notaris. „A New Perspective on the Cavernous Sinus as Seen through Multiple Surgical Corridors: Anatomical Study Comparing the Transorbital, Endonasal, and Transcranial Routes and the Relative Coterminous Spatial Regions“. Brain Sciences 13, Nr. 8 (17.08.2023): 1215. http://dx.doi.org/10.3390/brainsci13081215.
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Background: The cavernous sinus (CS) is a highly vulnerable anatomical space, mainly due to the neurovascular structures that it contains; therefore, a detailed knowledge of its anatomy is mandatory for surgical unlocking. In this study, we compared the anatomy of this region from different endoscopic and microsurgical operative corridors, further focusing on the corresponding anatomic landmarks encountered along these routes. Furthermore, we tried to define the safe entry zones to this venous space from these three different operative corridors, and to provide indications regarding the optimal approach according to the lesion’s location. Methods: Five embalmed and injected adult cadaveric specimens (10 sides) separately underwent dissection and exposure of the CS via superior eyelid endoscopic transorbital (SETOA), extended endoscopic endonasal transsphenoidal-transethmoidal (EEEA), and microsurgical transcranial fronto-temporo-orbitozygomatic (FTOZ) approaches. The anatomical landmarks and the content of this venous space were described and compared from these surgical perspectives. Results: The oculomotor triangle can be clearly exposed only by the FTOZ approach. Unlike EEEA, for the exposure of the clinoid triangle content, the anterior clinoid process removal is required for FTOZ and SETOA. The supra- and infratrochlear as well as the anteromedial and anterolateral triangles can be exposed by all three corridors. The most recently introduced SETOA allowed for the exposure of the entire lateral wall of the CS without entering its neurovascular structures and part of the posterior wall; furthermore, thanks to its anteroposterior trajectory, it allowed for the disclosure of the posterior ascending segment of the cavernous ICA with the related sympathetic plexus through the Mullan’s triangle, in a minimally invasive fashion. Through the anterolateral triangle, the transorbital corridor allowed us to expose the lateral 180 degrees of the Vidian nerve and artery in the homonymous canal, the anterolateral aspect of the lacerum segment of the ICA at the transition zone from the petrous horizontal to the ascending posterior cavernous segment, surrounded by the carotid sympathetic plexus, and the medial Meckel’s cave. Conclusions: Different regions of the cavernous sinus are better exposed by different surgical corridors. The relationship of the tumor with cranial nerves in the lateral wall guides the selection of the approach to cavernous sinus lesions. The transorbital endoscopic approach can be considered to be a safe and minimally invasive complementary surgical corridor to the well-established transcranial and endoscopic endonasal routes for the exposure of selected lesions of the cavernous sinus. Nevertheless, peer knowledge of the anatomy and a surgical learning curve are required.
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Manassero, M., D. Leperlier, S. Scotti, V. Viateau, P. Moissonnier und R. Vallefuoco. „Surgical repair of thoraco-lumbar vertebral fracture-luxations in eight cats using screws and polymethylmethacrylate fixation“. Veterinary and Comparative Orthopaedics and Traumatology 27, Nr. 04 (2014): 306–12. http://dx.doi.org/10.3415/vcot-13-08-0098.
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SummaryObjective: To report our clinical experience in the surgical treatment of feline thora-columbar vertebral fracture-luxations using optimal safe implantation corridors as previously described in vitro.Study design: Retrospective clinical study.Materials and Methods: Medical records and radiographs of cats with vertebral fracture- luxations stabilized by screws and polymethylmethacrylate (PMMA) using optimal safe implantation corridors between 2009 and 2011 were reviewed. For each patient the data included: signalment, cause of vertebral fracture-luxations, presence of concurrent injuries, pre- and postoperative neurological grade, surgical treatment, imaging findings, and clinical outcome with short-term (2 weeks) and long-term (12 months) follow-up.Results: Eight cats with vertebral fracture-luxations involving the lumbar (L)(n = 5), the thoracic (T) spinal segments (n = 2), or the thoraco-lumbar junction (n = 1) were included in the study. Screws and PMMA were used bilaterally in five cats and unilaterally in three cats. No surgical intra-operative complications using the defined corridors were recorded. Implant failure followed by spontaneous recovery was recorded in one case. Two cats died in the postoperative period (≤4 days). The short-term and long-term clinical outcome was excellent in four out of eight cats and satisfactory in two out of eight cats.Conclusion and Clinical relevance: This pilot study demonstrates the clinical applicability of optimal safe implantation corridors for stabilization of feline thoraco-lumbar vertebral fracture-luxations with screws and PMMA. This technique can be used with limited risks of iatrogenic injuries for stabilization of vertebral fracture-luxation localized between T11-L4.
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Zarocostas, J., und P. Moszynski. „UN tries to secure safe corridors for humanitarian aid in Pakistan“. BMJ 338, may20 1 (20.05.2009): b2042. http://dx.doi.org/10.1136/bmj.b2042.
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Farmer, Roger E. A. „Unwinding: A Tale of Corridors and Floors“. National Institute Economic Review 241 (August 2017): R70—R73. http://dx.doi.org/10.1177/002795011724100116.
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I discuss six tools available to monetary policy makers. Three of these have been used since the inception of central banking. Three are new and were introduced in the aftermath of the 2008 financial crisis. I argue that, when the UK Monetary Policy Committee raises the interest rate, it should maintain a large balance sheet that consists of both risky and safe assets. Further, the Bank should trade the risk composition of its balance sheet to promote the stability of asset prices.
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Sampaio, Carlos, Margarida C. Coelho, Eloísa Macedo und Jorge M. Bandeira. „Emission Impacts of Post-Pandemic Travel Behaviour in Intercity Corridors“. Future Transportation 2, Nr. 1 (03.03.2022): 249–62. http://dx.doi.org/10.3390/futuretransp2010013.
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COVID-19 pandemic impacted the behaviour of travellers. While worldwide, overall emissions decreased during the lockdown, shared mobility options may be perceived as less safe in a post-pandemic reality, leading to increased emissions due to expanded individual transportation. In particular, intercity trips entail numerous environmental impacts, such as emissions. The main objective of this paper is to assess how intercity corridors’ emissions vary when travel behaviour of the population changes following a pandemic. Based on a macroscopic modelling framework, the methodology consisted of three main phases: data collection, traffic modelling and emission modelling. Different scenarios related to the impact of the pandemic were developed, and their impacts were analysed using several key performance indicators related to CO2 NOx emissions and travel time. Findings suggest that reducing the average number of occupants per vehicle reduces emissions, which do not increase linearly with the number of vehicles. Compared with the baseline scenario (occupancy rate of 1.30), the most extreme scenario (occupancy rate of 1.00) may result in an increase in both CO2 and NOx emissions by approximately 30%. These results highlight the importance of making public transport and carpooling not only safe but also safe as perceived by users.
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Kromer, Ryan, Matt Lato, D. Jean Hutchinson, Dave Gauthier und Tom Edwards. „Managing rockfall risk through baseline monitoring of precursors using a terrestrial laser scanner“. Canadian Geotechnical Journal 54, Nr. 7 (Juli 2017): 953–67. http://dx.doi.org/10.1139/cgj-2016-0178.
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Rockfalls represent significant risks to safe and efficient use of transportation corridors. In this paper, we address the management of rockfall risk through baseline remote monitoring of susceptible slopes (every 2–4 months) along a transportation corridor along the Fraser River valley in western Canada using a terrestrial laser scanner and supporting remote sensing technologies. This includes identifying potential rockfall source zones based on incipient signs of failure, tracking kinematics in three dimensions to better understand the mechanism of failure, estimating potential failure volumes based on bounding joint structure, and transmitting this information to the railway operator for an assessment of risk. We demonstrate our approach for one case along the line where we identified several potential failures ranging in volume from 48 to 4200 m3. Our projections of the location of failures were successful, in that volume projections were within 10%–55%, and the anticipated kinematics and failure mechanism were consistent with the assessment of post-failure rockfall scar geometries. Accurate volume and kinematics estimates are important for the assessment of hazard and risk as well as the planning of risk mitigation options. In general, this approach can be used to better manage risk from rockfall hazard in communities, transportation corridors, or other infrastructure.
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Zarocostas, J. „UN calls for safe humanitarian corridors in northern Yemen as conflict escalates“. BMJ 339, sep02 1 (02.09.2009): b3546. http://dx.doi.org/10.1136/bmj.b3546.
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Chen, Kang, Xu Xin, Tao Zhang und Zhongzhen Yang. „Multiport cooperative location model with a safe-corridors setting in West Africa“. International Journal of Logistics Research and Applications 23, Nr. 6 (01.01.2020): 580–601. http://dx.doi.org/10.1080/13675567.2019.1708873.
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Sukhinin, Sergey, Konstantin Petrov und Irina Novoselova. „Features, problems and opportunities for the development of transport corridors in the Eurasian Economic Union“. E3S Web of Conferences 371 (2023): 04014. http://dx.doi.org/10.1051/e3sconf/202337104014.
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International transport corridors are a manifestation of transport links between states with the goal to expand economic contacts and develop transit traffic between them. International transport corridors ensure the coordination of transport systems of the participating states for the implementation of prompt, safe, large-scale and cost-effective supply of goods on a regular long-term basis. International transport corridors within the EAEU countries unite various types of transport routes, transport infrastructure facilities, vehicles and transport authorities. The decisive factor in the development of international transport corridors within the EAEU is the spatial localization of this integration grouping in the center of Eurasia between the European Union and China as the two main economic poles. Such location of the EAEU countries determines their opportunities for the transit of goods through their territory. However, the transport complex of the EAEU faces a number of problems that can be minimized through the implementation of promising projects for the development of transport and logistics infrastructure based on attracting investments and coordinating management decisions in the field of regulation of mutual transportation. This study examines the features of international transport corridors passing through the territory of the EAEU countries, analyzes the potential and problems of their development, and identifies opportunities for the implementation of large transport and logistics projects.
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Dick, C. Tyler, Darkhan Mussanov, Leonel E. Evans, Geordie S. Roscoe und Tzu-Yu Chang. „Relative Capacity and Performance of Fixed- and Moving-Block Control Systems on North American Freight Railway Lines and Shared Passenger Corridors“. Transportation Research Record: Journal of the Transportation Research Board 2673, Nr. 5 (04.04.2019): 250–61. http://dx.doi.org/10.1177/0361198119841852.
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North American railroads are facing increasing demand for safe, efficient, and reliable freight and passenger transportation. The high cost of constructing additional track infrastructure to increase capacity and improve reliability provides railroads with a strong financial motivation to increase the productivity of their existing mainlines by reducing the headway between trains. The objective of this research is to assess potential for advanced Positive Train Control (PTC) systems with virtual and moving blocks to improve the capacity and performance of Class 1 railroad mainline corridors. Rail Traffic Controller software is used to simulate and compare the delay performance and capacity of train operations on a representative rail corridor under fixed wayside block signals and moving blocks. The experiment also investigates possible interactions between the capacity benefits of moving blocks and traffic volume, traffic composition, and amount of second main track. Moving blocks can increase the capacity of single-track corridors by several trains per day, serving as an effective substitute to construction of additional second main track infrastructure in the short term. Moving blocks are shown to have the greatest capacity benefit when the corridor has more second main track and traffic volumes are high. Compared with three-aspect signal systems, much of the benefits of moving blocks can be obtained from adding signals and implementing a four-aspect signal system. Knowledge of train delay performance and line capacity under moving blocks will aid railway practitioners in determining if the benefits of these systems justify the required incremental investment over current PTC overlay implementations.
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Liu, James K., Qasim Husain, Vivek Kanumuri, Mohemmed N. Khan, Zachary S. Mendelson und Jean Anderson Eloy. „Endoscopic graduated multiangle, multicorridor resection of juvenile nasopharyngeal angiofibroma: an individualized, tailored, multicorridor skull base approach“. Journal of Neurosurgery 124, Nr. 5 (Mai 2016): 1328–38. http://dx.doi.org/10.3171/2014.12.jns141696.
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OBJECT Juvenile nasopharyngeal angiofibromas (JNAs) are formidable tumors because of their hypervascularity and difficult location in the skull base. Traditional transfacial procedures do not always afford optimal visualization and illumination, resulting in significant morbidity and poor cosmesis. The advent of endoscopic procedures has allowed for resection of JNAs with greater surgical freedom and decreased incidence of facial deformity and scarring. METHODS This report describes a graduated multiangle, multicorridor, endoscopic approach to JNAs that is illustrated in 4 patients, each with a different tumor location and extent. Four different surgical corridors in varying combinations were used to resect JNAs, based on tumor size and location, including an ipsilateral endonasal approach (uninostril); a contralateral, transseptal approach (binostril); a sublabial, transmaxillary Caldwell-Luc approach; and an orbitozygomatic, extradural, transcavernous, infratemporal fossa approach (transcranial). One patient underwent resection via an ipsilateral endonasal uninostril approach (Corridor 1) only. One patient underwent a binostril approach that included an additional contralateral transseptal approach (Corridors 1 and 2). One patient underwent a binostril approach with an additional sublabial Caldwell-Luc approach for lateral extension in the infratemporal fossa (Corridors 1–3). One patient underwent a combined transcranial and endoscopic endonasal/sublabial Caldwell-Luc approach (Corridors 1–4) for an extensive JNA involving both the lateral infratemporal fossa and cavernous sinus. RESULTS A graduated multiangle, multicorridor approach was used in a stepwise fashion to allow for maximal surgical exposure and maneuverability for resection of JNAs. Gross-total resection was achieved in all 4 patients. One patient had a postoperative CSF leak that was successfully repaired endoscopically. One patient had a delayed local recurrence that was successfully resected endoscopically. There were no vascular complications. CONCLUSIONS An individualized, multiangle, multicorridor approach allows for safe and effective surgical customization of access for resection of JNAs depending on the size and exact location of the tumor. Combining the endoscopic endonasal approach with a transcranial approach via an orbitozygomatic, extradural, transcavernous approach may be considered in giant extensive JNAs that have intracranial extension and intimate involvement of the cavernous sinus.
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Dębiński, Marcin, Michał Jukowski und Janusz Bohatkiewicz. „Emergency Corridors - Necessary Solutions in a Modern Road Network“. MATEC Web of Conferences 231 (2018): 02002. http://dx.doi.org/10.1051/matecconf/201823102002.
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Poland was a place of dynamic road network development in the 20th century. Many expressways and highways were built. Along with the development of the road network, there was a need to introduce new solutions which would be friendly to emergency services. The most important factor influencing the chances of accident victim survival is the time in which first aid will be administered. Reaching the victim is the primary problem for emergency services in case of road incidents. Driver behavior plays an important role, as they have significant effect on emergency service travel times. The emergency corridor is the solution ensuring quick and safe access to expressways and motorways. Examples from Polish roads in 2017 demonstrate that not all drivers are able to behave properly when emergency services move trying to access the accident site (cases of blocking, driving the wrong way through the corridor, etc.). It cannot be clearly assumed that drivers have bad intentions. According to the authors, the problem lies in education, access to information, and lack of regulatory policies. In Austria, Germany and Hungary, a great deal of resources has been devoted to information campaigns on safe behavior in the event of road accidents, and a number of legal provisions have developed allowing the police to ensure that these rules are respected.
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Wang, Chuanyue, Lei Zhang, Yifan Gao, Xiaoyuan Zheng und Qianling Wang. „A Cooperative Game Hybrid Optimization Algorithm Applied to UAV Inspection Path Planning in Urban Pipe Corridors“. Mathematics 11, Nr. 16 (21.08.2023): 3620. http://dx.doi.org/10.3390/math11163620.
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This paper proposes an improved algorithm applied to path planning for the inspection of unmanned aerial vehicles (UAVs) in urban pipe corridors, which introduces a collaborative game between spherical vector particle swarm optimization (SPSO) and differential evolution (DE) algorithms. Firstly, a high-precision 3D grid map model of urban pipe corridors is constructed based on the actual urban situation. Secondly, the cost function is formulated, and the constraints for ensuring the safe and smooth inspection of UAVs are proposed to transform path planning into an optimization problem. Finally, a hybrid algorithm of SPSO and DE algorithms based on the Nash bargaining theory is proposed by introducing a cooperative game model for optimizing the cost function to plan the optimal path of UAV inspection in complex urban pipe corridors. To evaluate the performance of the proposed algorithm (GSPSODE), the SPSO, DE, genetic algorithm (GA), and ant colony optimization (ACO) are compared with GSPSODE, and the results show that GSPSODE is superior to other methods in UAV inspection path planning. However, the selection of algorithm parameters, the difference in the experimental environment, and the randomness of experimental results may affect the accuracy of experimental results. In addition, a high-precision urban pipe corridors scenario is constructed based on the RflySim platform to dynamically simulate the optimal path planning of UAV inspection in real urban pipe corridors.
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Mujahed, Muhannad, und Hussein Jaddu. „Smooth and Safe Nearness-Diagram (SSND) Navigation for Autonomous Mobile Robots“. Advanced Materials Research 403-408 (November 2011): 4718–26. http://dx.doi.org/10.4028/www.scientific.net/amr.403-408.4718.
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This paper addresses further enhancements of the earlier developed Smooth Nearness-Diagram Navigation (SND) method for mobile robots moving in complex and cluttered environments. The enhanced method, entitled SSND, improves the safety of paths generated by the SND and solves the problem of trapping the robot in narrow corridors, where the difference in the number of threats on its sides is high. This is achieved by adjusting the difference in the number of obstacles on the two sides of the robot heading direction. The power of our method is demonstrated by simulation results.
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Champagne, Pierre-Olivier, Eduard H. Voormolen und Sébastien Froelich. „Anterolateral Approach with Endoscopic Assistance for Resection of a Craniovertebral Junction Chordoma“. Journal of Neurological Surgery Part B: Skull Base 80, S 04 (28.10.2019): S375—S377. http://dx.doi.org/10.1055/s-0039-1698820.
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AbstractCraniovertebral junction chordomas can represent a surgical challenge, especially when intradural extension and contact with neurovascular structures is involved. To date, there is still controversy on the choice of optimal surgical corridor for such lesions, with endoscopic endonasal, far lateral and anterolateral corridors being those most commonly used. In this operative video, we present a case of craniovertebral junction chordoma with significant bone destruction and intradural extension (Fig. 1). The tumor was safely removed using an anterolateral approach with transposition of the vertebral artery to gain access to the lateral craniovertebral junction. The endoscope is demonstrated to help with intradural tumor removal, providing a wide angle of view through a relatively narrow dural opening (Fig. 2). In this video, nuances of the anterolateral approach, chordoma removal strategies and closure technique are presented in detail. A gross total resection was achieved, and the postoperative course was uneventful. In summary, the anterolateral approach with endoscopic assistance can offer a safe and effective corridor for the surgical management of craniovertebral junction chordomas.The link to the video can be found at: https://youtu.be/pC0YxKgNoMY.
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Nayagam, Selvadurai. „Safe corridors in external fixation: the lower leg (tibia, fibula, hindfoot and forefoot)“. Strategies in Trauma and Limb Reconstruction 2, Nr. 2-3 (Dezember 2007): 105–10. http://dx.doi.org/10.1007/s11751-007-0023-7.
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Ghoddousi, Arash, Benjamin Bleyhl, Clara Sichau, Delaram Ashayeri, Peyman Moghadas, Pooriya Sepahvand, Amirhossein Kh Hamidi, Mahmood Soofi und Tobias Kuemmerle. „Mapping connectivity and conflict risk to identify safe corridors for the Persian leopard“. Landscape Ecology 35, Nr. 8 (25.06.2020): 1809–25. http://dx.doi.org/10.1007/s10980-020-01062-0.
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Liu, James K., Kevin Zhao und Jean Anderson Eloy. „Combined strategy of maximal endoscopic endonasal resection and early radiation therapy for complex cystic and solid craniopharyngioma: operative video“. Neurosurgical Focus: Video 2, Nr. 2 (April 2020): V7. http://dx.doi.org/10.3171/2020.4.focusvid.19963.
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Craniopharyngioma is a rare and benign intracranial tumor of the sellar and suprasellar region. Historically, these tumors were mostly accessed through transcranial corridors and resected with microsurgical techniques. Endoscopic endonasal surgery has recently gained popularity in the treatment of these tumors and has shown at least comparable results to transcranial approaches. The endoscopic endonasal approach provides direct midline access through a transplanum transtuberculum corridor and gives excellent visualization of the undersurface of the optic chiasm to allow safe bimanual sharp dissection of the tumor from the hypothalamus. In this operative video, we demonstrate the case of a 56-year-old female who had a complex craniopharyngioma with solid and cystic components extending superolaterally into the right frontal lobe. This lesion was invasive and partially encased the right optic nerve, optic chiasm, and anterior communicating artery complex. Although a traditional transcranial approach could have been utilized, we elected for an endoscopic endonasal approach for a maximal safe near-total resection, preserving the neurovascular structures. The patient underwent radiation therapy with favorable regression of the residual tumor on subsequent imaging studies. This case illustrates the feasibility of a combined strategy of maximal safe endoscopic endonasal resection followed by early radiation therapy for a complex, invasive cystic and solid craniopharyngioma. The technical nuances of safe bimanual microsurgical dissection of tumor adhesions off of critical neurovascular structures are demonstrated.The video can be found here: https://youtu.be/z0AINLpRZGs.
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Chen, Chaoxiang, Shiping Ye, Zhican Bai, Juan Wang, Alexander Nedzved und Sergey Ablameyko. „Intelligent Mining of Urban Ventilated Corridor Based on Digital Surface Model under the Guidance of K-Means“. ISPRS International Journal of Geo-Information 11, Nr. 4 (22.03.2022): 216. http://dx.doi.org/10.3390/ijgi11040216.
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With the acceleration of urbanization, climate problems affecting human health and safe operation of cities have intensified, such as heat island effect, haze, and acid rain. Using high-resolution remote sensing mapping image data to design scientific and efficient algorithms to excavate and plan urban ventilation corridors and improve urban ventilation environment is an effective way to solve these problems. In this paper, we use unmanned aerial vehicle (UAV) tilt photography technology to obtain high-precision remote sensing image digital elevation model (DEM) and digital surface model (DSM) data, count the city’s dominant wind direction in each season using long-term meteorological data, and use building height to calculate the dominant wind direction. The projection algorithm calculates the windward area density of this dominant direction. Under the guidance of K-means, the binarized windward area density map is used to determine each area and boundary of potential ventilation corridors within the threshold range, and the length and angle of each area’s fitted elliptical long axis are calculated to extract the ventilation corridors that meet the criteria. On the basis of high-precision stereo remote sensing data from UAV, the paper uses image classification, segmentation, fitting, and fusion algorithms to intelligently mine potential urban ventilation corridors, and the effectiveness of the proposed method is demonstrated through a case study in Zhuji City, Zhejiang Province.
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Li, Yiqun, Shaoqiang Liang, Jiahui Gao, Zong Chen, Siyuan Qiao und Zhouping Yin. „Trajectory Optimization for the Nonholonomic Space Rover in Cluttered Environments Using Safe Convex Corridors“. Aerospace 10, Nr. 8 (11.08.2023): 705. http://dx.doi.org/10.3390/aerospace10080705.
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Due to the limitation of space rover onboard computing resources and energy, there is an urgent need for high-quality drive trajectories in complex environments, which can be provided by delicately designed motion optimization methods. The nonconvexity of the collision avoidance constraints poses a significant challenge to the optimization-based motion planning of nonholonomic vehicles, especially in unstructured cluttered environments. In this paper, a novel obstacle decomposition approach, which swiftly decomposes nonconvex obstacles into their constituent convex substructures while concurrently minimizing the proliferation of resultant subobstacles, is proposed. A safe convex corridor construction method is introduced to formulate the collision avoidance constraints. The numerical approximation methods are applied to transfer the resulting continuous motion optimization problem to a nonlinear programming problem (NLP). Simulation experiments are conducted to illustrate the feasibility and superiority of the proposed methods over the rectangle safe corridor method and the area method.
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Nguyen, Dinh Dung, Jozsef Rohacs und Daniel Rohacs. „Autonomous Flight Trajectory Control System for Drones in Smart City Traffic Management“. ISPRS International Journal of Geo-Information 10, Nr. 5 (17.05.2021): 338. http://dx.doi.org/10.3390/ijgi10050338.
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With the exponential growth of numerous drone operations ranging from infrastructure monitoring to even package delivery services, the integration of UAS in the smart city transportation systems is an actual task that requires radically new, sustainable (safe, secure, with minimum environmental impact and life cycle cost) solutions. The primary objective of this proposed option is the definition of routes as desired and commanded trajectories and their autonomous execution. The airspace structure and fixed routes are given in the global GPS reference system with supporting GIS mapping. The concept application requires a series of further studies and solutions as drone trajectory (or corridor) following by an autonomous trajectory tracking control system, coupled with autonomous conflict detection, resolution, safe drone following, and formation flight options. The second part of the paper introduces such possible models and shows some results of their verification tests. Drones will be connected with the agency, designed trajectories to support them with factual information on trajectories and corridors. While the agency will use trajectory elements to design fixed or desired trajectories, drones may use the conventional GPS, infrared, acoustic, and visual sensors for positioning and advanced navigation. The accuracy can be improved by unique markers integrated into the infrastructure.
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Sanchez Correa, Thalia Estefania, David Gallardo Ceja und Diego Mendez-Rosito. „Subtemporal approach for the resection of a midbrain cavernous malformation: evaluation of safe surgical corridors“. Neurosurgical Focus: Video 1, Nr. 1 (Juli 2019): V1. http://dx.doi.org/10.3171/2019.7.focusvid.19135.
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Brainstem cavernous malformation management is complex due to its critical location and deleterious effect when bleeding. Therefore, every case should be thoroughly analyzed preoperatively. We present the case of a female patient with a midbrain cavernous malformation. A comprehensive anatomical and clinical analysis of the surgical corridors is done to decide the safest route. A subtemporal approach was done and the lateral mesencephalic sulcus and vein were important anatomical landmarks to guide the safe entry zone. Nuances of technique and surgical pearls related to the safe entry zones of the midbrain are discussed and illustrated in this operative video.The video can be found here: https://youtu.be/vYA-IgiT2lU.
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Liu, James K., und Asif Shafiq. „Teflon bridge technique for endoscopic-assisted microvascular decompression of ectatic basilar artery and anterior inferior cerebellar artery for trigeminal neuralgia: operative video and technical nuances“. Neurosurgical Focus: Video 3, Nr. 2 (Oktober 2020): V5. http://dx.doi.org/10.3171/2020.7.focvid2032.
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In this illustrative operative video, the authors demonstrate a Teflon bridge technique to achieve safe transposition of a large, tortuous ectatic basilar artery (BA) and anterior inferior cerebellar artery (AICA) complex to decompress the root entry zone (REZ) of the trigeminal nerve in a 61-year-old woman with refractory trigeminal neuralgia via an endoscopic-assisted retractorless microvascular decompression. Postoperatively, the patient experienced immediate facial pain relief without requiring further medications. The Teflon bridge technique can be a safe alternative to sling techniques when working in narrow surgical corridors between delicate nerves and vessels. The operative technique and surgical nuances are demonstrated.The video can be found here: https://youtu.be/hIHX7EvZc1c
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Scalenghe, Riccardo, und Ottorino-Luca Pantani. „Connecting Existing Cemeteries Saving Good Soils (for Livings)“. Sustainability 12, Nr. 1 (21.12.2019): 93. http://dx.doi.org/10.3390/su12010093.
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Background: Urban sprawl consumes and degrades productive soils worldwide. Fast and safe decomposition of corpses requires high-quality functional soils, and land use which competes with both agriculture and buildings. On one hand, cremation does not require much land, but it has a high energy footprint, produces atmospheric pollution, and is unacceptable to some religious communities. On the other hand, as exhumations are not practiced, “green burials” require more surface area than current burial practices, so a new paradigm for managing land use is required. Conclusions: In this paper, we propose a concept for ‘green belt communalities’ (i.e., ecological corridors with multiple, yet flexible, uses and services for future generations). With the expansion of urban centers, ecological corridors gradually disappear. Cemeteries for burial plots preclude alternative uses of the land for a long time. By combining these two aspects (need for connectivity and land take imposed by cemeteries), two positive results can be achieved: protecting memories of the past and connecting ecosystems with multiple-use corridors. This new paradigm works best in flat or hilly terrain where there are already several urban agglomerations that contain traditional cemeteries. Stakeholders who might consider this concept are local administrators, planners, and the communities of individuals who share specific beliefs on burial systems.
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Liu, Sikang, Michael Watterson, Kartik Mohta, Ke Sun, Subhrajit Bhattacharya, Camillo J. Taylor und Vijay Kumar. „Planning Dynamically Feasible Trajectories for Quadrotors Using Safe Flight Corridors in 3-D Complex Environments“. IEEE Robotics and Automation Letters 2, Nr. 3 (Juli 2017): 1688–95. http://dx.doi.org/10.1109/lra.2017.2663526.
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Morales Gonzalez, Janeth Alexandra, QingJuan Yang und Poyan Sayed Mustafa. „Multifunctionality of green corridors during pandemic lockdowns: a case study of Riobamba city in Ecuador“. International Journal of Scientific Research and Management 10, Nr. 06 (05.06.2022): 1138–59. http://dx.doi.org/10.18535/ijsrm/v10i6.sh02.
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The pandemic has demonstrated several weaknesses and inequalities in the way society live and develops within cities, such as economic losses, massive contagions, and above all, the lack of control and people's lack of awareness about the crisis. This study aims to investigate the transformation of cities with a shortage of green spaces into cities with green and sustainable planning, the association between urban greenery and physical activity during the Covid-19, and urban green corridors as a planning tool for urban green areas.
The green corridor was born out of a social need in the face of a health crisis and the improvement of the urban environment. This research employs three methods to study: empirical judgment and experience analysis and network analysis. All those who could not cope with the lockdown exposed green and recreational spaces in Riobamba, since only 7% of those surveyed stayed at home, while 70% left their homes for green or recreational spaces within the urban area and 23% left the city. This shows how the quality of green areas can positively affect people’s behaviors during the Covid-19. This effect highlighted the preservation of natural areas, urban reforestation, and re-naturalization of spaces. The urban green corridor is a system that connects several spaces, creating two interactions: the first is how the city can provide the necessary infrastructure during a crisis, and the second is how it energizes and prioritizes the health and supply systems for urban residents, creating safe spaces for each of the city's sectors.
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Clatterbuck, Richard E., und Rafael J. Tamargo. „Contralateral Approaches to Multiple Cerebral Aneurysms“. Operative Neurosurgery 57, suppl_1 (01.07.2005): 160–63. http://dx.doi.org/10.1227/01.neu.0000163601.37465.6e.
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Abstract NOT INFREQUENTLY, PATIENTS with bilateral cerebral aneurysms are encountered. In such patients, the ability to treat bilateral aneurysms through a unilateral approach spares the patient the risk and inconvenience associated with a separate craniotomy. The contralateral approach for aneurysm repair is technically feasible and safe in appropriately selected patients. Herein, we review our technique for maximizing contralateral exposure and clipping contralateral aneurysms through the four anatomic triangles that serve as corridors in this approach.
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Huang, Yuchun, Yingli Du und Wenxuan Shi. „Fast and Accurate Power Line Corridor Survey Using Spatial Line Clustering of Point Cloud“. Remote Sensing 13, Nr. 8 (18.04.2021): 1571. http://dx.doi.org/10.3390/rs13081571.
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High-voltage and ultra-high-voltage overhead power lines are important to meet the electricity demand of our daily activities and productions. Due to the overgrowth of trees/vegetation within the corridor area, the distance between the power lines and its surroundings may break through the safety threshold, which could cause potential hazards such as discharge and fire. To ensure the safe and stable operation of the power lines, it is necessary to survey them regularly so that the potential hazards from the surroundings within the power line corridor could be investigated timely. This paper is motivated to quickly and accurately survey the power line corridor with the 3D point clouds. The main contributions of this paper include: (1) the spatial line clustering is proposed to accurately classify and complete the power line points, which can greatly overcome the sparsity and missing of LiDAR points within the complex power line corridor. (2) The contextual relationship between power lines and pylon is well investigated by the grid-based analysis, so that the suspension points of power lines on the pylon are well located. (3) The catenary plane-based simplification of 3D spatial distance calculation between power lines and ground objects facilitates the survey of the power line corridor. Experimental results show that the accuracy of safety distance surveying is 5 cm for power line corridors of all voltage levels. Compared to the ground-truth point-to-point calculation, the speed of surveying is enhanced thousands of times. It is promising to greatly improve both the accuracy and efficiency of surveying the potential hazards of power line corridor.
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Jeon, Chiman, Jung Won Choi, Doo-Sik Kong und Hyung Jin Shin. „Outcome of endoscopic transcortical intraventricular biopsy of isolated thickened pituitary stalk lesions in children“. Journal of Neurosurgery: Pediatrics 29, Nr. 3 (01.03.2022): 319–24. http://dx.doi.org/10.3171/2021.9.peds21254.
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OBJECTIVE The purpose of this study was to investigate the efficacy and safety of endoscopic transcortical intraventricular biopsy in pediatric patients with isolated thickened pituitary stalk lesions. METHODS From 1994 to 2018, 16 pediatric patients (8 males and 8 females) underwent endoscopic transcortical intraventricular biopsy at a single institution to establish an accurate pathological diagnosis for appropriate treatment strategies. RESULTS Preoperatively, the median diameter of the pituitary stalks was 5.31 ± 1.67 mm (range 3.86–9.17 mm). Overall, the diagnostic yield at endoscopic intraventricular biopsy was 93.8%. Histopathological diagnosis included germinoma (n = 10, 62.5%), Langerhans cell histiocytosis (n = 4, 25%), pilocytic astrocytoma (n = 1, 6.3%), and pituicytoma (n = 1, 6.3%). Two patients developed new diabetes insipidus after the procedure, and 3 patients had new postoperative hypothyroidism. There were no postoperative neurological deficits in this series. CONCLUSIONS Neuroendoscopic biopsy via the transcortical intraventricular corridor was shown to be safe and to aid in a reliable histopathological diagnosis in the management of isolated pituitary stalk lesions in pediatric patients. It can be considered a minimally invasive alternative to open biopsy via transcranial or endonasal corridors.
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Jalil, Erlinawati, Renni Anggraini und Sugiarto Sugiarto. „ANALISIS BIAYA OPERASIONAL KENDARAAN, ABILITY TO PAY DAN WILLINGNESS TO PAY UNTUK PENENTUAN TARIF BUS TRANS KOETARADJA KORIDOR III“. Jurnal Arsip Rekayasa Sipil dan Perencanaan 1, Nr. 4 (09.12.2018): 1–10. http://dx.doi.org/10.24815/jarsp.v1i4.12449.
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The Government of Aceh through the Department of Transportation develop the transportation system, especially in the means of transportation one of them improve the urban transport system with the mass transit system that is Trans Koetaradja of 6 (six) corridors. Trans Koetaradja transportation is carefully planned so that it has the same direction and destination point and is bound to a predetermined schedule by using transportation cost concept which regulates fare setting so as to provide services for mutual interest, safe, fast, convenient and cheap. This research is conducted to determine the fare of Trans Koetaradja based on vehicle operational cost (VOC), Ability To Pay and Willingness To Pay from its passenger. Primary data were obtained from interviews and field surveys using state preference method in public and student respondents around Corridor III. Sampling was conducted in stratified random sampling to household (home interview survey) with total sample amounted to 110 samples. Data analysis was done by using 3 (three) method of DEPHUB method to calculate VOC, Household Budget Method to get Ability To Pay (ATP) value and perception method to get Willingness To Pay (WTP) value. The results of this study obtained the fare for corridor III based on VOC was Rp. 5,900.00, the general public ATP was Rp. 5,400.00 and student/college student was Rp. 5,200.00, public WTP was Rp. 3.000.00, and student/college student was Rp. 2,800.00
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Olusegun Adebayo, Joseph, und Trust Matsilele. „Nigerian experience with post-conflict peacebuilding : examining operation safe corridors and the Niger Delta amnesty programme“. Journal of African Union Studies 8, Nr. 3 (15.12.2019): 135–56. http://dx.doi.org/10.31920/2050-4306/2019/8n3a7.
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