254 research outputs found
Convex functions on Grassmannian manifolds and Lawson–Osserman problem
No full textAbstractWe derive estimates of the Hessian of two smooth functions defined on Grassmannian manifold. Based on it, we can derive curvature estimates for minimal submanifolds in Euclidean space via Gauss map as in [Y.L. Xin, Ling Yang, Curvature estimates for minimal submanifolds of higher codimension, arXiv: 0709.3686; 24]. In this way, the result for Bernstein type theorem done by Jost and the first author could be improved
Correction to: A Siamese transformer network for zero-shot ancient coin classification (Journal of Imaging, (2023), 9, 6, (107)
No full textJochen Büttner was not included as an author in the original publication [1]. The corrected Author Contributions statement appears here. Author Contributions: Conceptualization, J.B. (Siamese structure), Z.G. and O.A. (transformer components); methodology, Z.G., O.A. and Y.L.; software, Z.G. and Y.L.; investigation, Z.G. and D.R.; resources, Z.G. and O.A.; data curation, O.A.; writing—original draft preparation, Z.G., O.A., D.R. and Y.L.; writing—review and editing, Z.G. and O.A.; visualization, Z.G.; supervision, O.A.; project administration, O.A.; after initial publication, J.B. has agreed to be added as a co-author. All authors have read and agreed to the published version of the manuscript. The authors state that the scientific conclusions are unaffected. This correction was approved by the Academic Editor. The original publication has also been updated.</p
Author Correction: Differential epigenetic reprogramming in response to specific endocrine therapies promotes cholesterol biosynthesis and cellular invasion
No full textThis Article omits a declaration from the Competing Interests statement, which should have included the following: ‘One of the authors, Y.L., is an editor on the staff of Nature Communications, but was not in any way involved in the journal review process. The other authors declare no competing interests.’ Also, the Article contains an error in the name of the author Alba Rodriguez-Meira, which is incorrectly given as Alba Meira. These errors have not been corrected in either the PDF or HTML versions of the Article. © 2019, The Author(s)
An Investigation into the Authenticity of the Bi-Lin-Lang-Guan Version of Jin Lu-Xiang’s Shang Shu Zhu
No full text金履祥為宋、元之際經學大家，據載金氏關於《尚書》的作品有《尚書表注》一卷、《尚書注》十二卷，又嘗以《尚書》為主，旁採經子諸說，作《通鑑前編》十二卷。近人蔡根祥曾考證其十二卷《尚書注》，當是由《通鑑前編》中將關於《尚書》部份的文字輯出而成，乃後人偽作。不過，事實上今日傳世的金履祥《尚書注》有兩種版本，一為陸心源《十萬卷樓叢書》本，此為流行本，一本則收入清人方功惠《碧琳琅館叢書》當中。兩書內容完全不同，然大部份學者均未詳加分別，以為同本。本文試圖就此一發現發現，由既有文獻資料，整理關於金履祥《尚書注》的歷來著作情形，並對《碧琳琅館叢書》本《金氏尚書注》內容作詳細的探討。經研究後，發現此書的思想、內容均與金履祥時代不合，再進一步考察，得知此本亦是偽作，為後人取元人陳師凱《書蔡傳旁通》為主，並用及相關資料作為〈序〉、〈跋〉、〈附錄〉拼湊而成，當是清代中葉之後的人所偽作。Jin Lu-Xiang is an important scholar in the Sung and the Yuan Dynasties. Allegedly, he is the author of Shang Shu Biao Zhu (Commentaries on the Chronicle in Shang Shu), Shang Shu Zhu (Commentaries on Shang Shu), and Zi Zhi Tong Jian Qian Bian (The History before Zi Zhi Tong Jian). Recently, Tsai Ken-Hsian has found out that Shang Shu Zhu is a fake: it is actually a part of Zi Zhi Tong Jian Qian Bian.
We currently have 2 versions of Jin’s Shang Shu Zhu, one of which is in Lu Xin-Yuan’s Shi-Wan-Juan-Lou Series and the other one is in Fang Gong-Hui’s Bi-Ling-Lang-Guan Series. These 2 versions are totally different, but few scholars have discovered this fact.
With a detailed investigation into all the documents related to Jin’s writing process of Shang Shu Zhu, this study proves that the Bi-Ling-Lang-Guan version is also a fake, because the thoughts that it includes do not exist in Jin’s time. This version is actually Chen Shi-Kai’s Shu Tsai Zhuan Pang Tong in the Yuan Dynasty, combined with related information as its preface, postscript, and appendix. It has been fabricated in the middle period of the Qing Dynasty
A single-photon ECAT reconstruction procedure based on a PSF model
No full textElectrical Engineering, Mathematics and Computer Scienc
Active Gust Load Alleviation for Flexible Wing Aircraft
No full textThis paper presents a novel active gust load alleviation approach within a multi-objective flight control framework developed by NASA for a flexible wing aircraft. The aircraft model is based on the NASA Generic Transport Model (GTM). The wing structures incorporate an aerodynamic control surface known as the Variable Camber Continuous Trailing Edge Flap (VCCTEF). Previous work already showed the ability of the VCCTEF to perform aeroelastic mode suppression, drag minimization and maneuver load alleviation in a multi-objective flight control framework. In this paper, the multi-objective flight control framework is extended to include active gust load alleviation. A Linear-Quadratic Gaussian (LQG) controller is augmented with Model Reference Adaptive Control (MRAC) to provide active gust load alleviation. Disturbance estimation is done using an Extended State Observer (ESO) to support the design of the active gust load alleviation controller. The results demonstrate the potential of active gust load alleviation within a multi-objective flight control framework for a high-aspect ratio flexible wing aircraft embodied with the VCCTEF.Aerospace EngineeringControl & Simulatio
Protein Kinase Cβ: Linking Intestine Fibroblast Growth Factor 15 to Hepatic Extracellular Signal Regulated Kinase 1/2 Signaling in Bile Acid and Cholesterol Homeostasis
No full textReducing lead times within military supply chains: the development and application of an information fragmentation perspective
No full textLead time reduction of military supply chain (MSC) processes is essential for well-functioning military organisations. MSCs are complex and uncertain systems, including interdependencies between actors and processes. Flexibility is needed for MSCs to deal with complexity and uncertainty. Furthermore, reducing lead times contributes to the flexibility of supply chains. Primary and secondary supply chain processes are highly interrelated. Therefore, reducing lead times in primary and secondary SC processes is relevant. The current scientific literature is lacking related to lead time reduction in MSCs. Besides this, supply chain management must be improved to minimise lead times in MSCs. However, insufficient empirical research exists on information sharing within supply chain management literature. Information sharing is essential for effective MSCs. Thus, the relevance of information sharing for improving SCM, combined with the lacking scientific literature on lead time reduction in MSCs, indicates a new specific research area that contributes to reducing lead times in MSCs by focusing on information sharing. This research focuses on formal information sharing, defined as the sharing of structured and traceable information in a formal setting. Inadequate formal information sharing results in the scattering of formal information throughout a multi-actor system referred to as 'information fragmentation’. Since information sharing is a crucial component of SCs, information fragmentation may influence the lead times of SCs. However, the issue of information fragmentation in terms of lead times in MSCs is not apparent, and neither is how to solve information fragmentation problems in MSCs. This research contributes by developing and applying an information fragmentation perspective towards lead time reduction in MSCs. A case study at the Dutch Ministry of Defence (the invoice case) is used to analyse whether the perspective is valuable in practice. The invoice case is a financial supportive MSC process encountering problems related to lead times and formal information sharing. Additionally, two types of formal information are distinguished: process in practice and process design information. Three main results are obtained in this research. Firstly, this research contributes with an information fragmentation perspective towards lead time reduction for MSCs. Secondly, identifying a significant problem in the invoice case shows the effect of information fragmentation on MSC lead times due to non-value-adding activities. Lastly, exploring two boundary objects - a track and trace system (integrating formal process in practice information) and an integrated process design overview (integrating formal process design information) is a first contribution to the practical support of boundary objects to reduce information fragmentation in MSCs. In further research, the proposed boundary objects can be further developed. Moreover, the effect of these boundary objects on information fragmentation and reduction of lead times can be quantitatively analysed. Furthermore, the impact of informal information sharing on lead times can be incorporated. Complex Systems Engineering and Management (CoSEM
Effects of guided journal writing on students' story understanding
No full textThe authors investigated the effects of guided journal writing on students' understanding of themes and main characters in a complex novel. Three English 12 classes were randomly assigned to 1 no-writing condition and 2 writing conditions—character clues and general-response questions. The results from 2 posttests consistently indicated that students who wrote significantly surpassed students who did not write. Student self-ratings data indicated that the students believed that the writing activities helped them with story understanding. Student interview data indicated that students believed that the writing made them think more deeply about the story. The results support the contributions of writing to student literary learning and the research of J. Marshall (1987) and G. E. Newell (1994, 1996).Peer reviewedFinal article publishedEnglish classesguided journal writinghigh schoo
Modelling information-flow in formal organisations: Case study of the Dutch Military Air Transport Unit
No full textThe Dutch Ministry of Defence fulfils a crucial role in keeping the Dutch kingdom safe. From missions overseas to providing aid in the case of natural disasters, correct and efficient information-flow is critical for their operations. When a situation occurs, everything is dropped to make sure that they can handle it. The Royal Dutch Army, Navy, Airforce and Marechaussee make up the armed forces part of the military. Besides the branches of the armed forces, there are two support branches. Under one of them, Defensie Ondersteuningscommando, the Air Transport Unit of the Dutch military is located. This unit plans and advises on all forms of air transport for the Ministry of Defence, a unit where correct and timely information is flow critical.This thesis attempts to answer the following research question: What are the effects of formal network structures within public organisations on their information-flow quality? Attempting to fill gaps in literature surrounding the effect of formal network structures on information-flow quality. The study defines information-flow which is used for the KPIs. The effects of formal network structures on information-flow quality are studied using an ABM model developed in this thesis. The model is tested on the Air Transport Unit network and a diverse set of randomly generated networks. In this case, key findings from the model results indicate that in the case hierarchy, a more hierarchical structure positively affects their data correctness. However, this more hierarchical structure negatively affects their information timeliness. Employee business does not seem to be affected by hierarchy. Other findings relating to the number of employees whose function it is to control data for mistakes, have significant effects on improving data correctness while at the same time, negatively affecting the timeliness of information. Indicating that the optimum, hierarchical, or less hierarchical organisation lies with the ambitions and goals of an organisation. Engineering and Policy Analysi
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