Journal of Navigation最新文献

The supine moving apprehension test-Reliability and validity among healthy individuals and patients with anterior shoulder instability. 仰卧移动忧虑测试--健康人和肩关节前部不稳定患者的可靠性和有效性。

4区工程技术

Journal of Navigation Pub Date : 2024-02-01 Epub Date: 2023-04-18 DOI: 10.1177/17585732231170197

Alon Rabin, Ofir Chechik, Margie K Olds, Timothy L Uhl, Efi Kazum, Adin Deutsch, Eran Citron, Tal Cohen, Oleg Dolkart, Assaf Bibas, Eran Maman

{"title":"The supine moving apprehension test-Reliability and validity among healthy individuals and patients with anterior shoulder instability.","authors":"Alon Rabin, Ofir Chechik, Margie K Olds, Timothy L Uhl, Efi Kazum, Adin Deutsch, Eran Citron, Tal Cohen, Oleg Dolkart, Assaf Bibas, Eran Maman","doi":"10.1177/17585732231170197","DOIUrl":"10.1177/17585732231170197","url":null,"abstract":"Background: Performance-based tests for patients with anterior shoulder dislocation are lacking. This study determined the reliability and validity of the supine moving apprehension test designed to assess the ability to control anterior instability loads.Methods: Thirty-six participants were recruited (18 healthy individuals, and 18 patients following anterior shoulder dislocation). Healthy participants performed the supine moving apprehension test on 2 separate occasions to determine test-retest reliability. Patients completed the supine moving apprehension test and the Western Ontario Shoulder Instability index before and 6 months after surgical stabilization of their shoulder. The presence of anterior apprehension was also documented post-operatively.Results: The supine moving apprehension test demonstrated good test-retest reliability (intraclass correlation coefficient = 0.74-0.84). Patients performed 18-30 repetitions less than healthy individuals during the supine moving apprehension test (P < 0.01). A strong correlation was found between supine moving apprehension test scores and Western Ontario Shoulder Instability post-operatively (r = -0.74, P ≤ 0.01). Supine moving apprehension test scores significantly improved among patients following surgery (P < 0.01). Patients with a negative apprehension test post-operatively performed the supine moving apprehension test significantly better than patients with a positive apprehension test (P < 0.01).Conclusions: The supine moving apprehension test is reliable and valid among patients with anterior shoulder dislocation and may serve to assess patients' ability to control shoulder anterior instability loads.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":"31 1","pages":"98-105"},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10902411/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78794462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

GPS + Galileo + BDS-3 medium to long-range single-baseline RTK: an alternative for network-based RTK? GPS+Galileo+BDS-3中远程单基线RTK：基于网络的RTK的替代方案？

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2023-08-31 DOI: 10.1017/s0373463323000243

Sermet Ogutcu, S. Alcay, B. Ozdemir, H. Duman, Ulkunur Koray, Ceren Konukseven, Nesibe Gül Bilal

{"title":"GPS + Galileo + BDS-3 medium to long-range single-baseline RTK: an alternative for network-based RTK?","authors":"Sermet Ogutcu, S. Alcay, B. Ozdemir, H. Duman, Ulkunur Koray, Ceren Konukseven, Nesibe Gül Bilal","doi":"10.1017/s0373463323000243","DOIUrl":"https://doi.org/10.1017/s0373463323000243","url":null,"abstract":"\u0000 Thanks to the development of the real-time kinematic (RTK) algorithm and the emerging Global Navigation Satellite System (GNSS), especially for Galileo and BeiDou-3, reliable positioning accuracy for medium and long-baseline RTK became possible globally. Moreover, with the development of the GNSS receiver hardware, baseline length limitations due to radio-based communications are removed thanks to internet-based communication. In this work, single-baseline RTK, incorporated partial ambiguity resolution with troposphere and ionosphere weighting, using GPS (G), Galileo (E), BeiDou-3 (C3) and multi-GNSS (GE and GEC3), is conducted with real GNSS data of EUREF Permanent GNSS network under three different cutoff angles (10°, 20°, and 30°) for six different lengths of baselines (~50, ~150, ~250, ~350, ~450, and ~550 km). The results show that the multi-GNSS RTK solution significantly contributed to the positioning accuracy and convergence time of the single-system RTK solutions. Based on the results, non-available epoch-wise solutions for the high-degree cutoff angles are more obvious for the single-system RTK, whereas multi-GNSS solutions provide 100% solutions for each cutoff angle and baseline. The results indicate that instantaneous and a few epochs single-epoch ambiguity resolution is feasible for 50, 150, 250 and 350 km baseline lengths for multi-GNSS RTK. Based on the positioning results, horizontal–vertical positioning improvements of multi-GNSS RTK (GEC3) compared with the single-system GPS RTK are found as 50%–37%, 40%–35%, 55%–47%, 53%–54%, 57%–49% and 57%–49% for 50, 150, 250, 350, 450 and 550 km, respectively, under a 10° cutoff angle. For 20° and 30° cutoff angles, the accuracy improvements are much higher. The convergence time improvements (n/e/u) of multi-GNSS RTK (GEC3) compared with the single-system GPS RTK are found as 86/92/75%, 77/67/72%, 75/77/83%, 53/56/52%, 69/49/62%, and 52/45/39% for 50, 150, 250, 350, 450 and 550 km, respectively, under a 10° cutoff angle.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44975470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Compass adjustment by GPS (or any other GNSS receiver) and a single visual reference 通过GPS(或任何其他GNSS接收器)和单一视觉参考调整指南针

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2023-08-01 DOI: 10.1017/s0373463323000176

Jorge Moncunill Marimon, Francisco Javier Martínez de Osés, Rafael Cabal Álvarez

{"title":"Compass adjustment by GPS (or any other GNSS receiver) and a single visual reference","authors":"Jorge Moncunill Marimon, Francisco Javier Martínez de Osés, Rafael Cabal Álvarez","doi":"10.1017/s0373463323000176","DOIUrl":"https://doi.org/10.1017/s0373463323000176","url":null,"abstract":"\u0000 This paper proposes a proper compass adjustment method using only a GPS (or any other GNSS receiver) and a single visual reference to enhance the efficiency of compass adjustment. During compass adjustment, the ship proceeds on magnetic courses using a gyroscopic or satellite compass and considering magnetic declination. However, non-magnetic compasses are only compulsory for ships of 500 gross tonnage or upwards (SOLAS V/19.2.5.1). Many ships of less than 500 gross tonnage have only a magnetic compass to indicate heading. In these cases, a minimum of five leading lines or a minimum of five bearings of conspicuous and distant points or sun azimuths are necessary to adjust the compass. This makes compass adjustment more laborious and time consuming. To expedite this process, a reliable and practical method was developed to use the courses over ground given by a GNSS receiver and a single visual reference instead of the headings provided by a gyroscopic or satellite compass. The method is valid for all ships, but is primarily intended for those equipped with only a magnetic compass to indicate heading.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48321787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Navigation pattern extraction from AIS trajectory big data via topic model 基于主题模型的AIS轨迹大数据导航模式提取

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2023-07-10 DOI: 10.1017/s0373463323000206

Iwao Fujino, C. Claramunt

引用次数: 0

The Impact of Vaccination Among Hospitalized Patients with the Diagnosis of COVID-19. 在诊断为 COVID-19 的住院病人中接种疫苗的影响。

4区工程技术

Journal of Navigation Pub Date : 2023-06-23 eCollection Date: 2023-06-01 DOI: 10.36519/idcm.2023.216

Yeşim Yıldız, Hasan Selçuk Özger, Ali Acar, Ayşegül Seremet-Keskin, Umut Devrim Binay, Gülten Ünlü, Halim Bayram, Ali Asan, Mustafa Özgür Akça, Dilek Karamanlioğlu, Osman İnan, Şafak Kaya, Çiğdem Yıldırım, Yusuf Arslan, Süheyla Kömür, Yasemin Saygıdeğer, Fatma Özlem Kandemir, Simge Yaşar, İrem Akdemir-Kalkan, Zeynep Tekin-Taş, Ayşe Sakız, Yaşar Bayındır, Ayşe Belin Özer, Ayşe Özlem Mete, Çiğdem Erol, Çiğdem Mermutluoğlu, Ali Kemal Kadiroğlu, Alpay Azap, Esin Şenol

{"title":"The Impact of Vaccination Among Hospitalized Patients with the Diagnosis of COVID-19.","authors":"Yeşim Yıldız, Hasan Selçuk Özger, Ali Acar, Ayşegül Seremet-Keskin, Umut Devrim Binay, Gülten Ünlü, Halim Bayram, Ali Asan, Mustafa Özgür Akça, Dilek Karamanlioğlu, Osman İnan, Şafak Kaya, Çiğdem Yıldırım, Yusuf Arslan, Süheyla Kömür, Yasemin Saygıdeğer, Fatma Özlem Kandemir, Simge Yaşar, İrem Akdemir-Kalkan, Zeynep Tekin-Taş, Ayşe Sakız, Yaşar Bayındır, Ayşe Belin Özer, Ayşe Özlem Mete, Çiğdem Erol, Çiğdem Mermutluoğlu, Ali Kemal Kadiroğlu, Alpay Azap, Esin Şenol","doi":"10.36519/idcm.2023.216","DOIUrl":"10.36519/idcm.2023.216","url":null,"abstract":"Objective: We aimed to investigate the vaccination status and the risk factors for the intensive care unit (ICU) support need of the laboratory-confirmed breakthrough COVID-19 infection inpatients.Materials and methods: This multi-center point-prevalence study was conducted on inpatients, divided into two groups as 'fully' and 'partially' vaccinated according to COVID-19 vaccination status.Results: Totally 516 patients were included in the study. The median age was 65 (55-77), and 53.5% (n=276) of the patients were male. Hypertension (41.9%, n=216), diabetes mellitus (DM) (31.8%, n=164), and coronary artery disease (CAD) (16.3%, n=84) were the predominant comorbidities. Patients were divided into two groups ICU (n=196) and non-ICU (n=301). Hypertension (p=0.026), DM (p=0.048), and congestive heart failure (CHF) (p=0.005) were significantly higher in ICU patients and the median age was younger among non-ICU patients (p=0.033). Of patients, 16.9% (n=87) were fully vaccinated, and this group's need for ICU support was statistically significantly lower (p=0.021).Conclusion: We conclude that older age, hypertension, DM, CHF, and being partially vaccinated were associated with the need for ICU support. Therefore, all countries should continuously monitor post-vaccination breakthrough COVID-19 infections to determine the national booster vaccine administration approach that will provide vulnerable individuals the highest protection.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":"17 1","pages":"118-126"},"PeriodicalIF":0.0,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10986718/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78813708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A high-precision and efficient algorithm for space-based ADS-B signal separation 一种高精度、高效的天基ADS-B信号分离算法

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2023-06-16 DOI: 10.1017/s0373463323000139

Yan Bi, R. Wu, Qiongqiong Jia

{"title":"A high-precision and efficient algorithm for space-based ADS-B signal separation","authors":"Yan Bi, R. Wu, Qiongqiong Jia","doi":"10.1017/s0373463323000139","DOIUrl":"https://doi.org/10.1017/s0373463323000139","url":null,"abstract":"\u0000 Space-based automatic dependent surveillance-broadcast (ADS-B) receivers can cover thousands of aircraft, each transmitting 6 ⋅ 2 signals per second. As a result, ADS-B signals are very prone to overlap. When the number of aircraft covered by a receiver reaches 3,000, about 90 % of the signals will be overlapping. Overlapped signals can reduce the decoding accuracy of receivers, so that aircraft information cannot be accurately transmitted to the air traffic control (ATC) surveillance system, hence threatening aviation flight safety. It is necessary to propose signal separation algorithms for space-based ADS-B systems. An orthogonal projection linear constrained minimum variance (OPLCMV) algorithm is proposed, which can separate two signals simultaneously based on the linearly constrained minimum variance algorithm by exploiting the characteristics of overlapped signals. Compared with the state-of-the-art extended projection algorithm and the fast independent component analysis algorithm, the OPLCMV method has a higher decoding accuracy for multiple overlapping signals with a small direction difference of arrival or frequency shift. Moreover, the OPLCMV algorithm has a low computational complexity when the number of overlapped signal sources is less than seven.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46047458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Literature review on maritime cybersecurity: state-of-the-art 海上网络安全文献综述:最新进展

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2023-06-06 DOI: 10.1017/s0373463323000164

Hongchu Yu, Qiang Meng, Z. Fang, Jingxian Liu

引用次数: 1

Robust train localisation method based on advanced map matching measurement-augmented tightly-coupled GNSS/INS with error-state UKF 基于先进地图匹配测量增强GNSS/INS与误差状态UKF的鲁棒列车定位方法

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2023-03-01 DOI: 10.1017/S0373463323000097

Dan Liu, Wei Jiang, B. Cai, O. Heirich, J. Wang, W. Shangguan

{"title":"Robust train localisation method based on advanced map matching measurement-augmented tightly-coupled GNSS/INS with error-state UKF","authors":"Dan Liu, Wei Jiang, B. Cai, O. Heirich, J. Wang, W. Shangguan","doi":"10.1017/S0373463323000097","DOIUrl":"https://doi.org/10.1017/S0373463323000097","url":null,"abstract":"Abstract This paper presents a robust train localisation system by fusing a Global Navigation Satellite System (GNSS) with an Inertial Navigation System (INS) in a tightly-coupled (TC) strategy. To improve navigation performance in GNSS partly blocked areas, an advanced map-matching (MM) measurement-augmented TC GNSS/INS method is proposed via an error-state unscented Kalman filter (UKF). The advanced MM generates a matched position using a one-step predicted position from a UKF time update step with binary search algorithm and a point–line projection algorithm. The matched position inputs as an additional measurement to fuse with the INS position to augment the degraded GNSS pseudorange measurement to optimise the state estimation in the UKF measurement update step. Both the real train test on the Qinghai–Tibet railway and the simulation were carried out and the results confirm that the proposed advanced MM measurement-augmented TC GNSS/INS with error-state UKF provides the best horizontal positioning accuracy of 0 ⋅ 67 m, which performs an improvement of about 71% and 90% with respect to TC GNSS/INS with only error-state UKF and only error-state Extended Kalman filter in GNSS partly blocked areas.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":"76 1","pages":"316 - 339"},"PeriodicalIF":2.4,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49124647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Relation analysis of ship speed & environmental conditions: Can historic AIS data form a baseline for autonomous determination of safe speed? 航速与环境条件的关系分析:历史AIS数据能否构成自主确定安全航速的基线?

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2023-03-01 DOI: 10.1017/S0373463323000127

Leif Ole Dreyer

引用次数: 0

Characterisation and position-aiding performance analysis of Doppler observation from android smartphones android智能手机多普勒观测的特征化和位置辅助性能分析

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2023-03-01 DOI: 10.1017/S0373463323000115

Zihan Peng, C. Gao, Hua Zou, Rui Shang, Qi Liu, Wu Zhao

{"title":"Characterisation and position-aiding performance analysis of Doppler observation from android smartphones","authors":"Zihan Peng, C. Gao, Hua Zou, Rui Shang, Qi Liu, Wu Zhao","doi":"10.1017/S0373463323000115","DOIUrl":"https://doi.org/10.1017/S0373463323000115","url":null,"abstract":"Abstract It has been acknowledged that the Doppler is beneficial to the GNSS positioning of smartphones. However, analysis of Doppler precision on smartphones is insufficient. In this paper, we focus on the characteristic analysis of the raw Doppler measurement from Android smartphones. A comprehensive investigation of the Doppler was conducted. The results illustrate that the availability of Doppler is stable and higher than that of carrier measurements, which means that the Doppler-smoothed code (DSC) method is more effective. However, there is a constant bias between the Doppler and the code rate in Xiaomi MI8, which indicates that extra processing of the DSC method is necessary for this phone. Additionally, it is demonstrated that the relationship between the Doppler and C/N0 can be expressed as an exponential function, and the fitting parameters are provided. The numerical experiment in car-borne and hand-held scenes was conducted for evaluating the performance of the Doppler-aided positioning algorithm. For positioning, the improvement reaches 37 ⋅ 69%/37 ⋅ 14%/26 ⋅ 61% in the east, north and up components, respectively, after applying the Doppler aiding. For velocity estimation, the improvement reaches 29 ⋅ 62%/39 ⋅ 63%/29 ⋅ 37% in the three components, respectively.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":"76 1","pages":"375 - 393"},"PeriodicalIF":2.4,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47958063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0