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945 Results Found

  • Article
  • Open Access
4 Citations
1,935 Views
17 Pages

7 November 2022

Optimizing the location of physical activity spaces (PAS) to ensure health, equity and efficiency has long been an important issue in urban planning. Given the health benefits of urban green spaces (UGS), taking Gongshu District in Hangzhou as a case...

  • Article
  • Open Access
5 Citations
3,070 Views
18 Pages

An Efficient Pose Estimation Algorithm for Non-Cooperative Space Objects Based on Dual-Channel Transformer

  • Ruida Ye,
  • Yuan Ren,
  • Xiangyang Zhu,
  • Yujing Wang,
  • Mingyue Liu and
  • Lifen Wang

7 November 2023

Non-cooperative space object pose estimation is a key technique for spatial on-orbit servicing, where pose estimation algorithms based on low-quality, low-power monocular sensors provide a practical solution for spaceborne applications. The current p...

  • Article
  • Open Access
3 Citations
1,850 Views
17 Pages

17 August 2024

This article presents approaches for enhancing engineering-geological and geotechnical research for the restoration and reconstruction projects of cultural heritage objects in St. Petersburg’s historical center. According to the Venice Charter,...

  • Article
  • Open Access
1 Citations
1,600 Views
13 Pages

6 May 2024

The algorithms for determining the active space object maneuver parameters in the conditions of near-circular orbits are presented in the paper. The right ascension and declination angles are used to determine the parameters of a single maneuver with...

  • Article
  • Open Access
1 Citations
899 Views
20 Pages

Active space debris removal is now integral to modern space exploration. In order to address the problem of a heterogeneous satellite swarm with different payloads carrying out the emergency active removal of space debris, this paper proposes a Multi...

  • Article
  • Open Access
8 Citations
5,667 Views
12 Pages

Characterizing Satellite Geometry via Accelerated 3D Gaussian Splatting

  • Van Minh Nguyen,
  • Emma Sandidge,
  • Trupti Mahendrakar and
  • Ryan T. White

25 February 2024

The accelerating deployment of spacecraft in orbit has generated interest in on-orbit servicing (OOS), inspection of spacecraft, and active debris removal (ADR). Such missions require precise rendezvous and proximity operations in the vicinity of non...

  • Article
  • Open Access
1,823 Views
32 Pages

25 July 2024

In this paper, we propose a Bayesian Optimization (BO)-based strategy using the Gaussian Process (GP) for feature detection of a known but non-cooperative space object by a chaser with a monocular camera and a single-beam LIDAR in a close-proximity o...

  • Article
  • Open Access
47 Citations
8,978 Views
22 Pages

Increasing active school travel (AST) among children may provide the required level of daily physical activity and reduce the prevalence of obesity. Despite efforts to promote this mode, recent evidence shows that AST rates continue to decrease in su...

  • Article
  • Open Access
1,125 Views
32 Pages

This study collected site and spatial morphological data from 63 typical aging community activity spaces and extracted 12 spatial types through statistical analysis. A parametric modeling tool was used to generate spatial models. Based on clearly def...

  • Article
  • Open Access
5 Citations
2,973 Views
18 Pages

An Effective Procedure to Build Space Object Datasets Based on STK

  • Rongke Wei,
  • Anyang Song,
  • Huixian Duan and
  • Haodong Pei

With the development of space technology, deep learning methods, with their excellent generalization ability, are increasingly applied in various space activities. The space object data is difficult to obtain, which greatly limits its application in...

  • Technical Note
  • Open Access
2 Citations
2,781 Views
11 Pages

The Effect of Space Objects on Ionospheric Observations: Perspective of SYISR

  • Junyi Wang,
  • Xinan Yue,
  • Feng Ding,
  • Baiqi Ning,
  • Lin Jin,
  • Changhai Ke,
  • Ning Zhang,
  • Junhao Luo,
  • Yonghui Wang and
  • Yihui Cai
  • + 2 authors

12 October 2022

Space objects around the Earth are a potential pollution source for ground-based radio observations. The Sanya incoherent scatter radar (SYISR) is a newly built active digital phased array, all solid-state transmitting and digital receiving incoheren...

  • Article
  • Open Access
756 Views
32 Pages

19 October 2025

The unprecedented increase in the number of objects orbiting the Earth necessitates a comprehensive characterisation of these objects to improve the effectiveness of Space Surveillance and Tracking (SST) operations. In particular, accurate knowledge...

  • Article
  • Open Access
4 Citations
3,929 Views
18 Pages

28 August 2022

This research aims at contributing to a seamless, integrated technology intelligent living system for solitary older adults at home. The capacitive intimate sensing module, that can be easily pasted to the existing home space element surfaces, daily...

  • Article
  • Open Access
27 Citations
4,484 Views
18 Pages

LEO Object’s Light-Curve Acquisition System and Their Inversion for Attitude Reconstruction

  • Fabrizio Piergentili,
  • Gaetano Zarcone,
  • Leonardo Parisi,
  • Lorenzo Mariani,
  • Shariar Hadji Hossein and
  • Fabio Santoni

23 December 2020

In recent years, the increase in space activities has brought the space debris issue to the top of the list of all space agencies. The fact of there being uncontrolled objects is a problem both for the operational satellites in orbit (avoiding collis...

  • Article
  • Open Access
1 Citations
6,941 Views
28 Pages

19 May 2015

This article presents: (i) a formal, generic model for active sensing tasks; (ii) the insight that active sensing actions can very often be searched on less than six-dimensional configuration spaces (bringing an exponential reduction in the computati...

  • Article
  • Open Access
5 Citations
2,566 Views
21 Pages

(1) Background: Public space is an important carrier for maintaining the cultural values of a village and the production and living customs of the villagers, but the use rights and boundaries are in an unstable and ambiguous state, and it is not a co...

  • Review
  • Open Access
21 Citations
10,983 Views
21 Pages

Survey of the Current Activities in the Field of Modeling the Space Debris Environment at TU Braunschweig

  • André Horstmann,
  • Christopher Kebschull,
  • Sven Müller,
  • Eduard Gamper,
  • Sebastian Hesselbach,
  • Kerstin Soggeberg,
  • Mohamed Khalil Ben Larbi,
  • Marcel Becker,
  • Jürgen Lorenz and
  • Enrico Stoll
  • + 1 author

The Institute of Space Systems at Technische Universität Braunschweig has long-term experience in the field of space debris modeling. This article reviews the current state of ongoing research in this area. Extensive activities are currently underway...

  • Article
  • Open Access
19 Citations
4,372 Views
14 Pages

30 September 2019

The population of space debris in near-Earth space is continuously growing and it represents a serious problem for active satellites and spacecraft. A performant ground-based and space-based network of sensors is necessary for space surveillance and...

  • Article
  • Open Access
3 Citations
2,868 Views
17 Pages

ATLAS: Latest Advancements and First Observations

  • João Pandeirada,
  • Miguel Bergano,
  • Paulo Marques,
  • Bruno Coelho,
  • Domingos Barbosa and
  • Mário Figueiredo

17 February 2024

The increasing amount of space debris poses a significant threat to operational satellites and space-based services. This article updates the community on the current status of the development of ATLAS, a tracking radar that is part of the EUSST netw...

  • Article
  • Open Access
1 Citations
2,392 Views
32 Pages

8 September 2025

Understanding visitors’ outdoor activities in urban public spaces and their relationship with the physical environment is essential for improving the precision of public space design. This study, set in the context of Yangzhou, China, focuses o...

  • Article
  • Open Access
2 Citations
2,409 Views
15 Pages

People-oriented planning has become the mainstream of urban space design. As an important research object of urban space, the accessibility and service level of accessibility and service level of green space as important indicators to evaluate the le...

  • Article
  • Open Access
1,972 Views
23 Pages

8 July 2025

Extensive attention has been given to children’s play spaces in public environments. Still, there exists a research need to devise a more comprehensive and structured design framework for space design addressing more comprehensive and structure...

  • Article
  • Open Access
12 Citations
3,813 Views
22 Pages

28 November 2023

With the increasing interest in space science exploration, the number of spacecraft in Earth’s orbit has been steadily increasing. To ensure the safety and operational integrity of active satellites, advanced surveillance and early warning of u...

  • Article
  • Open Access
46 Citations
4,695 Views
20 Pages

28 November 2019

National land spatial planning is dominated by urban-agricultural-ecological functions and has become a Chinese national strategic issue. However, the three functional spaces have serious conflicts in the karst areas, causing inconsistencies in regio...

  • Proceeding Paper
  • Open Access
2,133 Views
4 Pages

Enhancing the Capability of a Ground-Based Optical Telescope for Thai National Space objects Observation

  • Peerapong Torteeka,
  • Pakawat Prasit,
  • Kritsada Palee,
  • Apichart Leckngam and
  • Patcharin Kamsing

Nowadays, the space operations environment have to face with space safety problems because of the growing of space debris in resident of space objects (RSOs) that can cause a catastrophic collision. In order to prevent debris-related risks in operati...

  • Article
  • Open Access
11 Citations
4,123 Views
28 Pages

The Future of Radar Space Observation in Europe—Major Upgrade of the Tracking and Imaging Radar (TIRA)

  • Jens Klare,
  • Florian Behner,
  • Claudio Carloni,
  • Delphine Cerutti-Maori,
  • Lars Fuhrmann,
  • Clemens Hoppenau,
  • Vassilis Karamanavis,
  • Marcel Laubach,
  • Alexander Marek and
  • Felix Rosebrock
  • + 2 authors

11 November 2024

The use of near-Earth space has grown dramatically during the last decades, resulting in thousands of active and inactive satellites and a huge amount of space debris. To observe and monitor the near-Earth space environment, radar systems play a majo...

  • Article
  • Open Access
1 Citations
1,689 Views
25 Pages

7 February 2025

Urban community open spaces are external spaces for public use that meet the needs of residents in their daily lives, and which gradually become the basic unit for activities and fitness. The arrival of the era of ‘national fitness’ requi...

  • Article
  • Open Access
1,830 Views
18 Pages

As an aspect of garden space, tea space is an important part of traditional culture and inherited culture. This paper takes 210 representative literati painting images of Ming and Qing dynasties as the research object, combining historical materials,...

  • Article
  • Open Access
3 Citations
4,142 Views
13 Pages

Using Architectural Mapping to Understand Behavior and Space Utilization in a Surgical Waiting Room of a Safety Net Hospital

  • Elizabeth N. Liao,
  • Lara Z. Chehab,
  • Michelle Ossmann,
  • Benjamin Alpers,
  • Devika Patel and
  • Amanda Sammann

Objective: To use architectural mapping to understand how patients and families utilize the waiting space at an outpatient surgery clinic in a safety-net hospital. Background: The waiting period is an important component of patient experience and sat...

  • Article
  • Open Access
11 Citations
5,251 Views
15 Pages

Developing an Objective Framework to Evaluate Street Functions

  • Abbas Sheikh-Mohammad-Zadeh,
  • Nicolas Saunier and
  • E. O. D. Waygood

12 June 2022

Urban street networks are a vital part of urban areas and have a remarkable influence over quality of life and the use of sustainable modes. They make up about 80% of public space and shape urban activities and identity. Therefore, it is crucial to d...

  • Review
  • Open Access
138 Views
33 Pages

Redundant Robots for Work in Space—Literature Review

  • Ivan Chavdarov,
  • Bozhidar Naydenov,
  • Borislava Kostova and
  • Snezhana Kostova

16 February 2026

Space robots operate in unconventional environments, which places specific demands on their mechanical, actuation, and control systems. They need to address a variety of challenges in future space exploitation and exploration, such as in-orbit deploy...

  • Article
  • Open Access
23 Citations
4,741 Views
17 Pages

29 April 2021

The characteristics of the built environment and the configuration of public facilities can affect the health and well-being of older adults. Recognizing the range of daily activities and understanding the utilization of public facilities among older...

  • Article
  • Open Access
178 Views
16 Pages

Research on the Laser Ranging of Runaway Space Objects

  • Guanyu Wen,
  • Shuang Wang,
  • Yukun Zeng,
  • Tingyu Liu,
  • Mingliang Zhang,
  • Zhipeng Liang,
  • Makram Ibrahim,
  • Xingwei Han and
  • Chengzhi Liu

14 February 2026

With the increase in human space activities, there is a significant amount of space debris as well as defunct satellites that seriously threaten the safety of spacecraft in their orbits. The laser ranging technique is one of the most accurate methods...

  • Article
  • Open Access
18 Citations
4,365 Views
21 Pages

A Review of the Geomechanics Aspects in Space Exploration

  • Dariusz Knez and
  • Mohammad Ahmad Mahmoudi Zamani

11 November 2021

From the 2000s onwards, unprecedented space missions have brought about a wealth of novel investigations on the different aspects of space geomechanics. Such aspects are related to the exploratory activities such as drilling, sampling, coring, water...

  • Article
  • Open Access
13 Citations
4,009 Views
19 Pages

Space debris is a term for all human-made objects orbiting the Earth or reentering the atmosphere. The population of space debris is continuously growing and it represents a potential issue for active satellites and spacecraft. New collisions and fra...

  • Article
  • Open Access
23 Citations
12,630 Views
38 Pages

Since the first launch of an artificial satellite—Sputnik 1—in 1957, space activities have played a significant role as a pioneering technological sector with a high impact on the international scenario. The space system has changed rapid...

  • Article
  • Open Access
14 Citations
5,128 Views
20 Pages

3 October 2020

Urban public space has become one of the main infrastructures for informal sports in cities. However, despite the high impact of that practice, local records only show the sports activity at the urban spaces specifically designed and regulated for th...

  • Article
  • Open Access
19 Citations
15,624 Views
18 Pages

Space Debris Removal: A Game Theoretic Analysis

  • Richard Klima,
  • Daan Bloembergen,
  • Rahul Savani,
  • Karl Tuyls,
  • Daniel Hennes and
  • Dario Izzo

11 August 2016

We analyse active space debris removal efforts from a strategic, game-theoretical perspective. Space debris is non-manoeuvrable, human-made objects orbiting Earth, which pose a significant threat to operational spacecraft. Active debris removal missi...

  • Article
  • Open Access
1 Citations
4,754 Views
18 Pages

Spatial Relations between the Theatre and Its Surroundings: An Assessment Protocol on the Example of Warsaw (Poland)

  • Agnieszka Starzyk,
  • Kinga Rybak-Niedziółka,
  • Janusz Marchwiński,
  • Ewa Rykała and
  • Elena Lucchi

13 June 2023

Theater as a place, but also as a field of human and team activity involving the creation of performances performed in the presence of the viewer, has a centuries-old history. This study aims at examining the links between theatre architecture/space...

  • Article
  • Open Access
6 Citations
3,280 Views
17 Pages

Payload Camera Breadboard for Space Surveillance—Part I: Breadboard Design and Implementation

  • Joel Filho,
  • Paulo Gordo,
  • Nuno Peixinho,
  • Rui Melicio and
  • Ricardo Gafeira

14 March 2023

The rapid increase of space debris poses a risk to space activities, so it is vital to develop countermeasures in terms of space surveillance to prevent possible threats. The current Space Surveillance Network is majorly composed of radar and optical...

  • Review
  • Open Access
6 Citations
4,619 Views
18 Pages

Learning Activities with Plants and Technology: A Systematic Literature Review

  • Alejandro Leo-Ramírez,
  • Jose Alvarez,
  • Marina Pérez,
  • Wolfgang Greller and
  • Bernardo Tabuenca

7 March 2023

The increase in remote work and study modalities in recent years has changed our indoor physical spaces. Key variables such as air quality, temperature, or well-being in general have acquired special relevance when designing workspaces. In this conte...

  • Article
  • Open Access
3 Citations
3,370 Views
22 Pages

1 December 2022

Urban growth boundaries (UGBs) play an important role in controlling urban sprawl and protecting natural ecosystems. Traditional methods mainly focus on the heterogeneity of regional resources and environment rather than residents’ behavioral a...

  • Review
  • Open Access
32 Citations
12,990 Views
18 Pages

Research Review on Parking Space Detection Method

  • Yong Ma,
  • Yangguo Liu,
  • Lin Zhang,
  • Yuanlong Cao,
  • Shihui Guo and
  • Hanxi Li

13 January 2021

The parking assist system is an essential application of the car’s active collision avoidance system in low-speed and complex urban environments, which has been a hot research topic in recent years. Parking space detection is an important step...

  • Article
  • Open Access
15 Citations
7,096 Views
15 Pages

Impact of Activity-Based Working and Height-Adjustable Desks on Physical Activity, Sedentary Behavior, and Space Utilization among Office Workers: A Natural Experiment

  • Takashi Jindo,
  • Yuko Kai,
  • Naruki Kitano,
  • Kyohsuke Wakaba,
  • Mitsuru Makishima,
  • Koji Takeda,
  • Michitaka Iida,
  • Kinji Igarashi and
  • Takashi Arao

It has been reported that office environment is an important determinant of physical activity (PA) and sedentary behavior (SB) in office workers. However, the effect of changes in office environment (office renovation) is unclear. The purpose of this...

  • Article
  • Open Access
28 Citations
5,203 Views
19 Pages

21 April 2022

Background: Green spaces reduce the risk of multiple adverse health outcomes by encouraging physical activity. This study examined correlations between urban green space and residents’ health outcomes in hilly neighborhoods: if they are mediate...

  • Article
  • Open Access
1 Citations
3,547 Views
20 Pages

30 December 2024

In this paper, we propose an active robotic 3D reconstruction methodology for achieving full object 3D reconstruction. Existing robotic 3D reconstruction approaches often struggle to cover the entire view space of the object or reconstruct occluded r...

  • Article
  • Open Access
4 Citations
2,539 Views
19 Pages

14 April 2024

The development of new urban areas in Beijing has alleviated overcrowding in old urban centers and has ample public spaces for recreational activities. However, these public spaces are not ideally designed and have not been as successful as expected....

  • Article
  • Open Access
13 Citations
9,823 Views
15 Pages

Design of Urban Public Spaces: Intent vs. Reality

  • Mikkel Hjort,
  • W. Mike Martin,
  • Tom Stewart and
  • Jens Troelsen

This study investigated how two public spaces for sport and recreation were utilized by different user groups, and how this aligned with the initial design objectives for these spaces. Two newly built urban spaces situated in Copenhagen, Denmark, pro...

  • Article
  • Open Access
2 Citations
1,547 Views
25 Pages

Complexity has emerged as a global phenomenon with significant implications for the organization and structure of any system. In recent decades, the space system has undergone a transition to a more complex configuration. This essay argues that the i...

  • Article
  • Open Access
540 Views
25 Pages

17 December 2025

Against the backdrop of accelerating population aging, urban green spaces have become primary venues for elderly daily activities, with their winter thermal comfort emerging as a critical determinant of senior wellbeing. However, existing studies lac...

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