Location Of Centers Research Articles

Reinforcement learning-based charging cluster determination algorithm for optimal charger placement in wireless rechargeable sensor networks

Wireless power transfer (WPT) provides a promising technology for energy replenishment of wireless rechargeable sensor networks (WRSNs), where wireless chargers can be deployed at fixed locations for charging nodes simultaneously within their effective charging range. Optimal charger placement (OCP) for sustainable operations of WRSN with cheaper charging cost is a challenging and difficult problem due to its NP-completeness in nature. This paper proposes a novel reinforcement learning (RL) based approach for OCP, where the problem is firstly formulated as a charging cluster determination problem with a fixed clustering radius and then tackled by the reinforcement learning-based charging cluster determination (RL-CCD) algorithm. Specifically, nodes are coarsely clustered by the K-Means++ algorithm, with chargers placed at the cluster center. Meanwhile, RL is applied to explore the potential locations of the cluster centers to adjust the center locations and reduce the number of clusters, using the number of nodes in the cluster and the summation of distances between the cluster center and nodes as the reward. Moreover, an experience-strengthening mechanism is introduced to learn the current optimal charging experience. Extensive simulations show that RL-CCD significantly outperforms existing algorithms.

Cold chain distribution network design with heterogeneous fleet under carbon reduction policy application effect

ABSTRACT To integrate cold chain distribution network design problem with heterogeneous fleet, a multi-objective optimisation model is proposed to simultaneously optimise distribution routes, the quantity of internal combustion and electric refrigerated trucks (ERTs), and the number and location of distribution centres and charging stations with time window constraints, where the cold chain distribution operating cost and the customer dissatisfaction cost are minimised. A hybrid solution methodology, combining a multi-objective artificial fish swarm algorithm with a label-based optimisation algorithm, is presented to address this model. Extensive computational experiments verify the effectiveness of the proposed method. Moreover, a sensitivity analysis, focusing on the range of ERTs, the purchase subsidy for ERTs, the carbon tax and the carbon emission quota, informs the development of diverse carbon reduction policies. A comparative analysis of the implementation effect of carbon reduction policies can provide optimisation decision support for promoting sustainability in the electrification of cold chain distribution.

Regional variability of cardiovascular magnetic resonance access and utilization in the United States

Clinical guidelines and scientific data increasingly support the appropriate use of cardiovascular magnetic resonance (CMR) . The extent of CMR adoption across the United States (US) remains unclear. This observational analysis aims to capture CMR practice patterns in the US. Commissioned reports from the Society for Cardiovascular Magnetic Resonance (SCMR), pre-existing survey data from CMR centers, and socioeconomic and coronary heart disease data from the Centers for Disease Control and Prevention were used. The location of imaging centers performing CMR was based on 2018 Medicare claims. Secondary analysis was performed on center-specific survey data from 2017-2019, which were collected by members of the SCMR US Advocacy Subcommittee for quality improvement purposes. The correlation between the number of imaging centers billing for CMR services per million persons, socioeconomic determinants, and coronary heart disease epidemiology was determined. A total of 591 imaging centers billed the Center for Medicare & Medicaid Services for CMR services in 2018 and 112 (of 155) unique CMR centers responded to the survey. In 2018, CMR services were available in almost all 50 states. Minnesota was the state with the highest number of CMR centers per million Medicare beneficiaries (52.6 centers per million), and Maine had the lowest (4.4 per million). The total density of CMR centers was 16 per million for US Medicare beneficiaries. Sixty-eight percent (83 of 112) of survey responders were cardiologists, and 28% (31/112) were radiologists. In 72% (71/112) of centers, academic health care systems performed 81%-100% of CMR exams. The number of high-volume centers (>500 scans per year) increased by seven between 2017 and 2019. In 2019, 53% (59/112) of centers were considered high-volume centers and had an average of 19years of experience. Centers performing <50 scans had on average 3.5years of experience. Approximate patient wait time for a CMR exam was 2weeks to 1month. Despite increasing volume and availability in almost all 50 states, CMR access remains geographically variable. Advocacy efforts to improve access and innovations that reduce imaging time and exam complexity have the potential to increase the adoption of CMR technology.

Acculturation and Depression Help-Seeking Intentions in a Majority Mexican American College Student Sample.

Work has not examined if acculturation or enculturation may predict endorsed benefits, barriers, and intentions to seek mental health services for depression, specifically among Latino students enrolled in a rural and majority Latino immigrant institution of higher education. An improved understanding of factors informing mental health help-seeking is needed to identify possible intervention points to address gaps in accessing depression treatment. Participants (N = 406) read a vignette depicting a person with depressive symptoms. Participants were asked if they would seek help for depression if in the situation described in the vignette. Participants provided text responses about their preferences for managing depression symptoms and their mental health help-seeking history. Additionally, participants completed a self-report depression symptom screener, demographic surveys, acculturation assessment, and questionnaires on perceived benefits and barriers to seeking mental health services. Path analysis was used to test the link between acculturation status and intent to seek services for depression, with benefits and barriers as mediators. The results revealed that higher perceived benefits and lower barriers were directly associated with greater intentions to seek help. Furthermore, an indirect effect of acculturation on help-seeking intentions via higher perceived benefits of seeking care was observed. These findings persisted after controlling for age, gender, depression, and history of seeking care for depression. Future work should test the replicability of this finding with diverse college students living in predominantly immigrant communities. Universities might consider tailoring outreach initiatives to provide information on the range and accessibility of mental health services, the location of mental health service centers, and the procedures for accessing such services.

Determination of Growth Centers in Regional Development in Wonogiri Regency

Abstract One of the reasons for the social inequality that occurs in various regions is the difference in the pace of the economy and the uneven development across regions. In general, the problems that exist in areas experiencing inequality are high unemployment rates, lack of community facilities and infrastructure, and even inequality in the quality of natural resources and human resources. This problem causes underdeveloped areas to experience poverty. For this reason, it is necessary to determine distributed growth centers in Wonogiri Regency to minimize the gaps that occur. The aim of this research is to determine which sub-districts are suitable as locations for growth centers in Wonogiri Regency. The analysis used is scalogram analysis and gravity model analysis. Scalogram analysis is used to analyze the location of growth centers in terms of the number of facilities and infrastructure available, while gravity model analysis is used to analyze the determination of the hinterland of each growth center. The results of the analysis show that of the 25 sub-districts in Wonogiri Regency, 5 sub-districts have been identified as centers of growth, namely Wonogiri Sub-district, Jatisrono Sub-district, Baturetno Sub-district, Purwantoro Sub-district and Pracimantoro Sub-district.

ВЫЯВЛЕНИЕ ПОТЕНЦИАЛЬНЫХ ГОРОДСКИХ ЦЕНТРОВ НА ОСНОВЕ МОДЕЛИРОВАНИЯ ПАССАЖИРОПОТОКОВ (НА ПРИМЕРЕ САНКТ-ПЕТЕРБУРГА)

The article considers the development of methodological foundations and suggests methodological approaches to identify urban areas with signs of subcenters in the implementation of a polycentric model of urban development. It is demonstrated that the application of mathematical modeling of passenger flows contributes to solving the problem of urban areas differentiation according to criteria of transport accessibility, time costs and travel speeds. As part of the study, calculations of passenger flows and passenger turnover were performed on the example of the St. Petersburg agglomeration – using network and pre-network models. Comparing the values of transport demand and transport supply in the nodes of the network made it possible to identify the location of potential urban centers.

Accurately Modulating Binuclear Metal Nodes of Metal-Organic Frameworks for Oxygen Evolution.

The accurate manipulation of the species and locations of catalytic centers is crucial for regulating the catalytic activity of catalysts, which is essential for their efficient design and development. Metal-organic frameworks (MOFs) with coordinated metal sites are ideal materials for investigating the origin of catalytic activity. In this study, we present a Ni2-MOF featuring novel Ni-based binuclear nodes with open metal sites (OMSs) and saturated metal sites (SMSs). The nickel was replaced by iron to obtain Ni1Fe1-MOF. In the electrocatalytic oxygen evolution reaction, Ni1Fe1-MOF exhibited an overpotential and Tafel slope of 370 mV@10 mA cm-2 and 87.06 mV dec-1, respectively, which were higher than those of Ni2-MOF (283 mV@10 mA cm-2 and 39.59 mV dec-1, respectively), demonstrating the superior performance of Ni1Fe1-MOF. Furthermore, theoretical calculations revealed that iron as an SMS may effectively regulate the electronic structure of the nickel catalytic center to reduce the free energy barrier ΔG*OH of the rate-determining step.

The Past, Present, and Future of the Internet: A Statistical, Technical, and Functional Comparison of Wired/Wireless Fixed/Mobile Internet

This paper examines the quantitative and qualitative situation of the current fixed and mobile Internet and its expected future. It provides a detailed insight into the past, present, and future of the Internet along with the development of technology and the problems that have arisen in accessing and using broadband Internet. First, the number of users and penetration rate of the Internet, the various types of services in different countries, the ranking of countries in terms of the mean and median download and upload Internet data speeds, Internet data volume, and number and location of data centers in the world are presented. The second task introduces and details twelve performance evaluation metrics for broadband Internet access. Third, different wired and wireless Internet technologies are introduced and compared based on data rate, coverage, type of infrastructure, and their advantages and disadvantages. Based on the technical and functional criteria, in the fourth work, two popular wired and wireless Internet platforms, one based on optical fiber and the other based on the 5G cellular network, are compared in the world in general and Australia in particular. Moreover, this paper has a look at Starlink as the latest satellite Internet candidate, especially for rural and remote areas. The fifth task outlines the latest technologies and emerging broadband Internet-based services and applications in the spotlight. Sixthly, it focuses on three problems in the future Internet in the world, namely the digital divide due to the different qualities of available Internet and new Internet-based services and applications of emerging technologies, the impact of the Internet on social interactions, and hacking and insecurity on the Internet. Finally, some solutions to these problems are proposed.

Research on User Satisfaction in Kayseri Province Primary Health Care Buildings

The design criteria determining the spatial quality of family health centres, one of the primary health care institutions where diagnostic, therapeutic and rehabilitation services and preventive health services are provided together, were determined as the subject of the study. Within the scope of the field study, the location, number and distribution of family health centers, where primary health care services are provided in the central districts of Kayseri city, were investigated. The selected family health centers were examined according to the evaluation criteria. A survey was conducted to understand how family health centers are perceived by patients, one of their users, and to evaluate their satisfaction rates regarding space quality. It was determined that these small-scale health centers are produced as structures that have no relation to the context since most of them are derived from typical projects. It was concluded that health buildings, where only physicality is considered while the psychological and social needs of the users are ignored, are inadequate in terms of healing spaces. Based on all the findings obtained as a result of the study, suggestions were made on the design criteria for family health center buildings, which concern the whole society, to become qualified buildings that contribute to healing in the future.

Geographic Disparity in Distance to Trauma Care in Secondary Schools Across the United States.

Geographic disparities exist in trauma care (ie, "trauma center desert") within the United States. An athletic trainer (AT) on site at secondary schools (SSs) may help enhance collaboration with emergency medical systems and potentially lead to better outcomes after catastrophic injuries. However, access to AT services relative to the location of level I or II (ie, tertiary) trauma centers remains unknown. To visualize and describe the distance between SSs and trauma centers and compare access to AT services across the United States. Cross-sectional study. Public and private SSs with interscholastic athletics programs in the United States. Survey data obtained through the Athletic Training Locations and Services (ATLAS) project database between September 2019 and April 2023. The minimum distance from each SS to a tertiary trauma center was calculated on Tableau Desktop by geocoding with longitude and latitude. The status and level of AT employment were obtained from the ATLAS project database. The odds and percentages of access to AT services were examined by distance ranges. A total of 18 244 SSs were included in the analyses. Of these, 75% (n = 13 613) were located within 50 miles (81 km) of a tertiary trauma center. The odds of access to AT services were 2.74 (95% CI = 2.56, 2.93) times greater in SSs situated within 50 miles of a tertiary trauma center (P < .001). Additionally, SSs located more than 60 miles (97 km) from a tertiary trauma center had decreased access to AT services (R2 = 0.9192). This study highlighted the geographic disparities in distance to trauma care for SSs in the United States. Those SSs located more than 60 miles from trauma centers had reduced odds of access to AT services. Identification of geographic trends of AT services relative to the location of tertiary trauma centers is a critical first step in preventing fatal consequences of catastrophic injuries.

Optimasi Biaya Transportasi Logistik Dan Penentuan Lokasi Gudang Baru Menggunakan Metode Center Of Gravity (COG)

To support product delivery, there is a need for distribution centers to send in a timely manner to various regions in Java Island. Research at PT. XYZ has a goal to determine the location of distribution centers that are effective and efficient in terms of minimizing transportation costs, because currently there are only old warehouses that are too far from distributors, with this distribution center, we can find out the cost comparison of product delivery to the intended distributor, and can also find out whether the center of gravity method can be applied to PT. XYZ or not. The case study of this research is product delivery in the East Java region by collecting product delivery data at PT. XYZ. This study uses Google Maps software to determine the coordinates of each customer, then calculates and processes the data using the Center of Gravity method. The research results obtained are the location of the new distribution center which is located in Kebontemu Hamlet, Peterongan District, Jombang Regency. With the new distribution center optimized by grouping, the effect on reducing transportation costs is 47%, and distances are 54%.

Temporal and spatial patterns in the prescriptions of disease-modifying therapies for multiple sclerosis. Results from the Italian Multiple Sclerosis and Related Disorders Register

BackgroundThe therapeutic scenario in multiple sclerosis (MS) has evolved over recent years with the progressive introduction of new drugs focused to better balance efficacy, safety and management requirements. The objective of this study was to examine the prescribing patterns of disease-modifying therapies (DMT) over time and across different geographic areas, and the latency between disease onset, first Register center visit, disease diagnosis, and the start of treatment in a large cohort of persons with MS from the Italian Multiple Sclerosis and Related Disorders Register. MethodsUp to 2022, the Register collected data from 124 centers on more than 78,000 persons, of whom 56,872 received at least one DMT prescription. Beside baseline demographic and clinical characteristics, we focused on DMT according to their efficacy distinguishing between moderate-efficacy (ME), or high-efficacy (HE). ResultsThere was a higher probability of prescribing HE-DMT for increasing calendar years (multivariable odds ratio, OR=11.51 in 2021 or thereafter vs before 2000), in males (OR=1.08 vs females), patients with primary progressive with or without relapse (OR=3.00 vs clinically isolated syndrome), those with a higher Expanded Disability Status Scale score (OR=3.85 for >4 versus 0–1), and those from larger referral centers (OR=1.89 vs smaller ones). Conversely, higher age at onset was associated to a lower probability of prescribing HE-DMT (OR=0.74 at 40 or more vs <20 years). A trend to shorter times was observed in subsequent calendar years for disease onset, first center visit, diagnosis and first DMT prescription. No trend was detected based on the location of the geographic referral centers. The times between disease onset, first center visit, and diagnosis and the first DMT prescription showed significant decreases according to the year, while differences were less evident for the geographic areas. ConclusionThis study highlights some factors influencing the choice of HE-DMT, including aspects of both healthcare and clinical phenotype. The absence of a geographic pattern may indicate some homogeneity in DMT prescriptions across different Italian MS centers.

Optimization of Quantum Nuclei Positions with the Adaptive Nuclear-Electronic Orbital Approach.

The use of multicomponent methods has become increasingly popular over the last years. Under this framework, nuclei (commonly protons) are treated quantum mechanically on the same footing as the electronic structure problem. Under the use of atomic-centered orbitals, this can lead to some complications as the ideal location of the nuclear basis centers must be optimized. In this contribution, we propose a straightforward approach to determine the position of such centers within the self-consistent cycle of a multicomponent calculation, making use of individual proton charge centroids. We test the method on model systems including the water dimer, a protonated water tetramer, and a porphine system. Comparing to numerical gradient calculations, the adaptive nuclear-electronic orbital (NEO) procedure is able to converge the basis centers to within a few cents of an Ångström and with less than 0.1 kcal/mol differences in absolute energies. This is achieved in one single calculation and with a small added computational effort of up to 80% compared to a regular NEO- self-consistent field run. An example application for the human transketolase proton wire is also provided.

A study of the instantaneous centers of velocity for 1-dof and 2-dof planar linkages

This paper presents a detailed study of the instantaneous centers of velocity (henceforth referred to as instant centers) and the lines containing the instant centers for one-degree-of-freedom (1-dof) and two-degree-of-freedom (2-dof) planar linkages with up to 11 links. The focus is on graphical methods to locate secondary instant centers (that is, instant centers which are unknown from inspection and require graphical construction) or the lines containing secondary instant centers. The secondary instant center for a pair of links with one relative degree of freedom is a unique point, and for a pair of links with two relative degrees of freedom the secondary instant center must lie on a unique line. For a 2-dof linkage, the problem of finding the unique locations of the secondary instant centers on these lines is not addressed in this paper (this would correspond to knowing the ratio of the two input velocities). The paper reviews known graphical methods for the 4-bar, 5-bar, 6-bar, and 7-bar linkages and then presents original graphical methods to locate the secondary instant centers for the 1-dof 8-bar and 10-bar linkages, and the lines containing the secondary instant centers for the 2-dof 9-bar and 11-bar linkages.

The Effects of Distance, Time, and Nonspatial Factors on Hemodialysis Access in Qatar.

Background A long distance and time spent traveling to a hemodialysis (HD) center and other factors, such as comorbidities, can significantly impact HD patient compliance, satisfaction, and cost. Uncertainty about HD-dependent patients' geographical location may lead to inappropriate distribution of HD centers. The present study investigates travel time, distance, and nonspatial factors affecting HD center accessibility within a 30-kmradius in the State of Qatar. Materials and methods The study included all HD-dependent patients residing in Qatar between March 1, 2020, and December 31, 2021. There were 921 patients dialyzed in six HD centers across Qatar. Our methodology incorporated descriptive and analytical cross-sectional designs to accurately identify the shortest routes and quickest travel times. We used two applications (Maptive {Vancouver, WA: BatchGeo LLC} and Google Maps {Mountain View, CA: Google LLC}) and marked a driving distance of 30 km as the main assessment scale and measurement standard, allowing optimum spatial accessibility determination. Results On average, patients traveled approximately 19±4.2 km, requiring almost 17.6±3.4 minutes to reach the assigned HD center three times per week. Based on geographic-spatial accessibility analysis, patients living in Umm Salal drove 31.4±3.5 km in 32.4±4.7 minutes, Al Daayen patients drove 30.2 km in 25.3 minutes, and others even drove more than 70 km to access HD sessions. Approximately 37.8% of Qatar's municipalities had no HD centers within their boundaries, but nearly 47% of HD-dependent patients lived in those municipalities. Additionally, some municipalities had HD centers; however, their general population density was less than 100 inhabitants/km2, and they had relatively few patients requiring regular HD. We noted a statistically significant correlation between the patients' residences and the locations of HD centers, whether they were located within or outside municipalities. Also, nonspatial factors may have affected the likelihood of reaching a hemodialysis center within a 30-km distance, including two or more comorbid conditions, having HD for at least five years, living in a municipality with more than 1,000 inhabitants/km2, being female, and attending dialysis centers that are more than 30 km away. Conclusion Although the available HD centers were sufficient for the present number of patients requiring HD, HD center locations did not match the patients' distribution, leading to difficulties for some patients. Understanding the impact of this geographic mismatch, population density, and other spatial factors helps significantly improve patient care and satisfaction at minimal cost. Furthermore, considering all these factors is crucial when planning new centers to achieve higher satisfaction and compliance as well as better health care.

Совершенствование транспортных технологических процессов железнодорожной сети

Purpose: To increase the efficiency of the railway transport network through the mutually beneficial interaction of lines of various categories. Methods: Methods of control theory, system analysis, synthesis and mathematical modeling were used. Results: The tools for determining the optimal location of logistics centers using the center of gravity method have been improved by taking into account the criteria for minimizing transport costs, category, specialization and social significance of the line, as well as determining the weight values of the criteria using the hierarchy analysis method. Practical significance: The proposed tools allow you to determine the location of the logistics center at the intersection of intensive and lowintensity railway lines, taking into account the criteria for minimizing transport costs, the specialization of the line and the social significance of the lines for the regions under consideration.

Basic Analysis of Physical Determinants Affecting the Distribution Density of Senior Citizen Centers around Small Apartment Complexes, Focusing on Administrative Districts in Busan

The role of senior citizen centers is becoming more important, with a greater emphasis placed on ensuring that these establishments facilitate leisure and communication for older adults. These developments are taking place as population aging has now become an irreversible global trend. However, there is still a lack of systematic research on predicting the distribution density of senior citizen centers based on physical factors in urban planning. Therefore, this study set each administrative district in Busan as a unit and investigated physical factors affecting the distribution density of senior citizen centers around small apartment complexes to validate their effectiveness. First, the spatial hierarchy of each administrative district in Busan was examined. The city was divided into administrative districts while focusing on the distribution density of senior citizen centers (the dependent variable) around small apartment complexes where older adults live (within a 500 m radius). The spatial accessibility of senior citizen centers and the number of apartments in each administrative district were set as independent variables. This selection was made to verify the effectiveness of the physical factors by conducting an independent sample t-test, normality test, Friedman test, and two-way ANOVA. The chief findings of this study are as follows. (1) The spatial awareness of each administrative district was low, and there were large disparities in the land development density relative to the spatial scale of the administrative districts. (2) Regarding the physical factors affecting the distribution density of senior citizen centers, the spatial accessibility of senior residences was more significant than the number of small apartment complexes nearby. (3) Personal and social factors may have indirectly influenced the distribution density of senior citizen centers more than physical factors, depending on the type of house in which the older adults live. The findings will provide a theoretical basis for determining the location and distribution density of senior citizen centers in urban planning considering physical factors, as well as serve as a reference for public policy decisions related to the allocation of such centers in the future.

A study on GIS-based spatial analysis of emergency response for disaster management: Focusing on Seoul

This study aims to analyze the operation of fire emergency dispatch, understand the impact of golden time on fire emergency dispatch, and identify factors and improvement measures for effective fire emergency dispatch with in prime time. According to the results of the study, rescue dispatch activities varies depending on the nature of the incident. The summer season had a higher number of calls than other seasons, and Saturday was the day of the week with the highest number of calls (i.e., Spring: 13,189, Summer: 15,652, Fall: 13,128, Winter: 14,545). When analyzing the spatial distribution of rescue incidents, it is found that rescue incidents were concentrated in some areas. In particular, the arrival time tended to be relatively long in areas south of the Han River and in areas where some fire stations or safety centers were not deployed. Results showed that rescue incidents dispatched by the stations other than neighboring stations were also concentrated in certain points. Based on these findings, the following policy implications can be drawn: first, the location of fire stations or safety centers should be adjusted; second, dispatch personnel and equipment should be strengthened; third, interagency cooperation should be strengthened; and fourth, prevention and education programs should be strengthened. Implementing these policy recommendations will improve fire emergency services' efficiency and response capabilities and minimize the occurrence and damage of life-saving events.

Abstract 800: Spatial accessibility of gynecologic oncologists and time to surgery in a diverse cohort of women with ovarian cancer in Northern California

Abstract Introduction: To expand our understanding of factors contributing to racial and ethnic disparities in ovarian cancer outcomes, we examined the association between spatial accessibility of gynecologic oncologists and time from cancer diagnosis to surgery in the KPROCS Study, a diverse cohort of women diagnosed with ovarian cancer between 2000-2018 at Kaiser Permanente Northern California (KPNC). Spatial medical accessibility is a component of healthcare access that captures the proximity and availability of healthcare resources in the area. Methods: Ovarian cancer cases were identified through the KPNC Cancer Registry. Demographic and clinical information was extracted from KPNC databases. Neighborhood characteristics from the California Neighborhoods Data System were linked to the residential addresses of cases at the time of diagnosis. Spatial medical accessibility was measured using the 2-step floating catchment area method based on the location of the infusion centers where KPNC gynecologic oncologists practice and the residence location of cohort members. We used generalized estimating equations with independent correlation structure and robust standard errors to examine the association between spatial accessibility of gynecologic oncologists and time to ovarian cancer surgery, adjusting for year and age at diagnosis, stage, histotype, race, ethnicity, neighborhood socioeconomic status (nSES), and receipt of neoadjuvant chemotherapy. Results: The cohort comprised 4,910 women with ovarian cancer, of whom 3,304 had surgery at KPNC. Of this group, 13% were Hispanic, 14% were non-Hispanic (NH) Asian American women, 5% NH Black women, and 67% NH White women. The proportion of women residing in areas of the lowest spatial accessibility of gynecologic oncologists was highest among NH White women (26%) and women residing in the highest quintile of nSES (29%). The median time from diagnosis to surgery was 4 days (interquartile range 22 days). In adjusted analyses, not including the information on spatial accessibility, the time from diagnosis to surgery was 5.1 days longer (95% CI 1.5, 8.7) for NH Black women than NH White women. After adding information on spatial accessibility, this time did not considerably change, resulting in a 5.3-day (95% CI 1.7, 8.9) difference. In this model, the lowest quintile of spatial accessibility of gynecologic oncologists was associated with a longer time from diagnosis to surgery, but this association was not statistically significant (0.4 days difference, 95% CI -1.3, 2.0). Summary: In our preliminary analyses, spatial accessibility of gynecologic oncologists was not found to be a contributing factor to the disparity in time from diagnosis to surgery between NH Black and NH White women. Further analyses will examine time from diagnosis to chemotherapy overall and stratified by racial and ethnic groups. Citation Format: Ekaterina Chirikova, Pushkar P. Inamdar, Valerie McGuire, Salma Shariff-Marco, Valerie S. Lee, Lindsay J. Collin, Carola T. Sanchez-Diaz, Juraj Kavecansky, C Bethan Powell, Jennifer A. Doherty, Lawrence H. Kushi, Elisa V. Bandera, Scarlett L. Gomez. Spatial accessibility of gynecologic oncologists and time to surgery in a diverse cohort of women with ovarian cancer in Northern California [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2024; Part 1 (Regular Abstracts); 2024 Apr 5-10; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2024;84(6_Suppl):Abstract nr 800.

Identification of Criteria for Evaluating the Location of Youth Recreation and Leisure Centers

Mental comfort for any individual is an important factor on the way to achieving one's goals and objectives. Based on research focused on young people, and conducted in relation to the COVID-19 pandemic, physical activity positively affects mental comfort and is one of the social preventive measures for maintaining mental comfort. Thus, designing spaces dedicated to young people has become a common social interest. The purpose of the article was to identify criteria for locating recreational and leisure centers for young people. For the purposes of the study, a detailed literature review was conducted, following which the most relevant locational features were listed, defining criteria for evaluating their location. In addition, a keyword co-occurrence network was developed using VOSviewer software. The research was conducted on the basis of the Scopus database. The presented review highlighted the lack of comprehensive studies on the analysis of the location of youth recreation and leisure centers, which is definitely a gap that needs to be filled. Taking such a study into consideration when conducting planning work would certainly be a valuable effort to help creating a friendly urban infrastructure and an effective network of services.