57 research outputs found
[[alternative]]A Study on Computer Generated Hologram and its Application on Joint Transform Correlator
No full text[[abstract]]By using the Computer Generated Hologram (CGH) technique, we designed a holographic lens with Fourier transform function, and applied this lens into the Joint Transform Correlator (JTC) system for image recognition. Computer simulations and experimental results of the JTC system with holographic lens are presented in this thesis. In addition, we designed and assembled a JTC module using the holographic lens, and the characteristic of image recognition are demonstrated.
Report on industrial attachment with Jurong Town Corporation
No full textThe author was able to participate in infrastructure and structural design, and site supervision at various JTC sites
The relationship between early symptom severity, improvement and remission in first episode psychosis with jumping to conclusions
No full textIt is suggested that Jumping To Conclusions (JTC) reasoning bias might contribute to the distortion of external reality. However, the association between psychotic manifestations and JTC is obscure, especially if general intelligence is considered as a mediator. The aim of this study is to investigate the relation between severity, early clinical improvement and remission of symptoms in First Episode Psychosis (FEP) with JTC as an explanatory factor. One hundred seventy-one FEP individuals were evaluated with the Positive and Negative Syndrome Scale (PANSS) at baseline and one month after treatment initiation. Clinical improvement was ascribed as symptom change one-month post-baseline measurements. Symptomatic remission was assessed with the Andreasen severity criteria and JTC with the Beads Task, operationalized through Draws To Decision (DTD) (the lower the number of DTD, the higher the JTC bias). Regarding symptoms severity, total psychotic, total positive psychotic, and hallucinations-item PANSS scores showed a negative association with JTC after controlling for IQ. Regarding early clinical improvement, the association with JTC was non-significant. No significant association was detected between one month remission status of FEP and JTC. Our findings indicate that severity of positive symptoms is not associated with hastiness in decision-making, but rather with a heightened conservatism in terms of increased data gathering. Further research is required to replicate the results and clarify the cognitive processes involved. © 2021 The Author
Jumping to conclusions bias, psychosis and impulsivity in early stages of Parkinson’s disease
No full textObjectives: The aim was to explore the correlations between Jumping to Conclusions (JtC) tendency and neuropsychiatric features in patients with early Parkinson’s disease (PD). Background: According to few reports, PD patients with impulsive–compulsive behaviors (ICBs) are prone to working memory difficulties including JtC bias. The correlation of psychotic features and JtC tendency remains still unclear. Methods: Healthy controls and patients within 3 years of PD onset were recruited. Participants were examined for psychotic symptoms using a 10 question PD-specific psychosis severity scale. JtC was measured by a probalistic reasoning scenario (beads task). In PD group, medication use, motor and non-motor symptoms were documented. Impulsivity was evaluated using the Questionnaire for Impulsive–Compulsive Disorders in PD (QUIP). Results: The prevalence of JtC bias was 9% (6/70) in healthy individuals, compared to 32% (22/68) of PD group [p = 0.001]. No association was detected between the presence of JtC tendency and PD-associated psychosis (p = 0.216). Patients with JtC had shorter duration of PD, more tremor-dominant PD subtype and higher QUIP scores, regardless of the dopaminergic therapy (p = 0.043, p = 0.015, p = 0.007, respectively). A trend towards attention and inhibition control deficit was noticed in JtC patients. Conclusions: We found a high prevalence of JtC bias in early, cognitively intact PD population and a potential link between subthreshold ICBs and poor performance on beads task. Additional studies are needed to confirm our results and elaborate on the mechanisms that correlate impulsivity with JtC tendency, which are likely to be different from those mediating psychotic features in early PD. © 2023, The Author(s)
Enzymatic modification of jute fabrics for enhancing the reinforcement in jute/PP composites
No full textIn this work, laccase was employed to improve the properties of lignocellulosic jute fabrics and then the modified jute was used as the fiber reinforcement of polypropylene (PP) matrix composites to improve its reinforcing effect on the polymer resins and obtain composite materials with better performance. The decrease in the COH component and the increase in the COC component on the surface of laccase-treated jute fabrics suggested that phenolic hydroxyl groups of lignins on the jute fiber surface were oxidized by laccase and the produced phenoxyl radicals were coupled to form ether structures. The laccase-treated jute fiber surface became smooth with lignins attached tightly. Moreover, the surface hydrophobicity and tensile properties of the jute fabrics were increased via the laccase-mediated reactions of lignins. PP composites reinforced by the laccase-treated jute fabrics showed higher breaking strength, storage modulus, and melting temperature than the control. The fracture surface of the laccase-treated jute fabric/PP composites was neat and jute fibers on the section surface were surrounded by PP resins closely, which indicated better interfacial adhesion between the modified jute reinforcement and PP matrix.The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was financially supported by the National Natural Science Foundations of China (51603087 and 51673087); Program for Changjiang Scholars and Innovative Research Team in University (IRT_15R26), and Fundamental Research Funds for the Central Universities (JUSRP51717A).info:eu-repo/semantics/publishedVersio
Structural health monitoring using distributed fiber optic sensors
No full textThis project aims to design a real time structural health monitoring (SHM) system for the monitoring of underground caverns. This research will focus on the strain and displacement experienced by the specimens under different cases of loadings. The specimens will be linked and monitored by optic fibers, Brillouin optical time-domain Reflectometer (BOTDR), strain gauges and linear variable displacement transducers (LVDT).
The first experiment was tested with a steel I-beam to determine the reliability of the red optic fiber cable. The results obtained from experimental, numerical and theoretical were then compared and discussed. The second experiment was tested with a steel frame structure with two different setups of the red optic fiber cable. The results obtained from the two setups were being correlated with a 3-dimensional model in Ansys Workbench. The author will then conclude the better setup that is more suitable for installation of the red optic fiber cable practically in the underground caverns.Bachelor of Engineering (Civil
Grouting in rock cavern : a case study
No full textIn current context, most of the civil and mining engineering projects use grouting as an aid for gound improvement. As such, when considering in grouting operations, the groutability and grout penetration depth are important issues to be looked at. Various parameters such as joint system, geomechanical characteristics, grout properties and technical factors such as grouting pressure affect the groutability and grout penetration depth in a jointed rock mass. In order to give a better prediction of grouting results, having sufficient knowledge of the effect of these parameters are important. In this study the effect of important parameters on grouting process in a jointed rock mass of Jurong Rock Cavern.are studied The analyses will focus on two key parameters which are Q-values and RMR values. Results can be used as a guide for grouting analysis in future similar underground tunnelling projects. With the numerical data gathered from Jurong Rock Cavern, the author aims to identify relationship between the grouting volume used with the rock parameters.Bachelor of Engineering (Civil
Author Correction: Microbiome-derived cobalamin and succinyl-CoA as biomarkers for improved screening of anal cancer
No full textEl texto del artículo original se encuentra disponible en http://hdl.handle.net/10486/717859This work was supported by the ERANET TRANSCAN-2 program, JTC 2016 (SCRAtCH project, grant agreement no. 643638), funded by Instituto de Salud Carlos III (project AC17/00019), AECC (grant TRNSC17002SER), Lombardy Foundation for Biomedical Research, Italy (SCRAtCH project, grant agreement no. 643638); Federal Ministry of Education and Research, Germany (SCRAtCH project, grant agreement no. 643638); and the Research Council of Norway and Norwegian Cancer Society, Norway (SCRAtCH project, grant agreement no. 643638). The work was also supported by grants PI18/00154, ICI20/00058 and PI21/00141, funded by Instituto de Salud Carlos III and cofounded by the European Union, and grants PID2020-112758RB-I00 and PDC2021-121534-I00 funded by the Ministerio de Ciencia e Innovación, Agencia Estatal de Investigación (AEI) (https://doi.org/10.13039/501100011033) and the European Union (‘NextGenerationEU’
Effects of rock parameters on rock cavern dimensions
No full textWhen planning to design an underground tunnel construction, it is vital to gather relevant geotechnical data regarding the rock mass condition in order to determine the most suitable orientation of the proposed tunnel. Depending on the orientations of the discontinuities, the tunnel must be excavated in a favourable and stable orientation that will result in minimal failures. Therefore, is important to investigate the stability of the tunnel relative to the joints present in the rock mass.
In light of the recent construction of the Jurong Rock Caverns oil storage facility in Singapore, this study focuses on the stability of a supposed excavation of a cavern similar to that of the aforementioned project with respect to varying joint orientations. By identifying ideal joint angles for excavation to take place, it can then offer as a guide for planning tunnel orientations in similar underground projects in the future.
Based on the geological data gathered from Bukit Timah Granite as well as the excavation dimensions at the Jurong Rock Caverns, a two-dimensional numerical analysis will be carried out using the DDA-2D software to simulate the changing conditions throughout the excavation process. With the aid of graphical results, the Author aims to identify the joint orientations most favourable for cavern construction.Bachelor of Engineering (Civil
Towards a reliable repeated-measures beads task for assessing the jumping to conclusions bias
No full text© 2017 Elsevier BV. This manuscript version is made available under the CC-BY-NC-ND 4.0 license:
http://creativecommons.org/licenses/by-nc-nd/4.0/
This author accepted manuscript is made available following 12 month embargo from date of publication (April 2018) in accordance with the publisher’s archiving policyThe jumping to conclusions bias (JTC), in which some people gather less information than
others before making a decision, has been linked to delusions in psychosis. JTC is usually
identified via the beads task, in which a sequence of beads (the “target” sequence) is used to
measure the amount of evidence participants require before making a decision. Yet, despite
its common use, the reliability of the task has never been properly investigated. We
investigated its reliability, and tested an alternate version which used distractor sequences to
obfuscate the target sequence. Healthy participants (N = 212) were randomised into two
groups. One group completed ten trials using the target sequence, while the other completed
ten trials of the target sequence and three distractor sequences. Our data indicated the
standard task may not be reliable over repeated measures, but that by including distractor
sequences, the task becomes more believable, repeatable, and reliable. Additionally,
excluding first-trial data (a “silent” practice trial) also improves repeatability. These
improvements to the task are relevant to single trial studies, and will be especially useful to
repeated-measures longitudinal, experimental, and treatment studies. Such repeated-measures
studies are important for investigating the causal link between JTC and delusions
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