443 research outputs found

    A Study of the Renewal Cycle of Hotel Building Elements in Malaysia

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    Penang is the main tourism island which appeals an increasing number of travellers each year. Therefore, the hotels in Penang play a crucial role in the field of Penang tourism. However, recently some problems with the Penang hotels have been brought to light frequently by travellers including domestic and foreign tourists. The reason for this may be due to irregular maintenance as well as the fact that the renewal of the building elements may not have been duly carried out. In light of that, this research investigated the condition of the maintenance and renewal cycle of the building elements of the hotels in Penang. This study was conducted with a quantitative method, using a questionnaire to collect information regarding the condition of maintenance, evaluation of the condition of the building elements and the frequency of building elements renewal. The results revealed that each building element renewal cycle is differing according to the effects of maintenance and its lifespan. In terms of comparison with the renewals in Singapore hotels, there are shortcomings involved in the schedule of element renewals carried out in Penang

    Paleoseismological and morphological evidence of slip rate variations along the North Tabriz fault (NW Iran)

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    International audienceNorthwest Iran is characterized by a high level of historical and instrumental seismicity related to the ongoing convergence between the Arabian and Eurasian plates. In this region, the main right-lateral strike-slip fault known as the North Tabriz fault (NTF) forms the central portion of a large crustal fault system called the Tabriz fault system (TFS). The NTF is a major seismic source along which at least three strong and destructive earthquakes have occurred since 858 AD. The two most recent destructive seismic events occurred in 1721 AD and 1780 AD, rupturing the SE and NW fault segments, respectively. This paper reports paleoseismological and quantitative geomorphologic investigations on the SE segment of the NTF, between the cities of Bostanabad and Tabriz. These observations help to improve our understanding of the seismic hazard for Tabriz city and its surrounding areas. Our field investigations revealed evidence of successive faulting events since the Late Quaternary. Paleoseismic investigations indicate that since 33.5 kyr, the SE segment of the NTF has experienced at least three major (M>7.5) seismic events, including the 1721 AD earthquake (M=7.6–7.7). Along the NW segment of the fault, however, our results suggest that the amount of strong (M~7.5) seismic events during the same period is significantly greater than along the SE segment. One possible explanation of such a difference in seismic activity is that the Late Quaternary-Holocene coseismic slip rate is decreasing along the NTF from the northwest to the southeast. This explanation contradicts the former hypothesis of a constant slip rate along the whole length of the NTF. In addition, more distributed deformation along several parallel fault branches, in a wider fault zone of the SE segment of the NTF may be considered as additional evidence for the estimation of lower rate of deformation along the fault segment. Such a slip distribution pattern can explain the existence of smaller (~300 m) Pliocene-Quaternary cumulative dextral offsets along the SE fault segment than the measured cumulative offsets along the NW segment (~800 m) of the NTF

    Training, Motivation And Leadership In Human Resource Development Practices: The Case Of Construction Firms Of Iran.

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    Sistem pembangunan sumber manusia yang mantap merupakan satu strategi yang kritis bagi syarikat pembinaan, kerana dalam tahun-tahun yang akan datang, modal insan memainkan peranan yang signifikan untuk sesebuah pertubuhan yang berjaya. A powerful human resource development system is a critical strategy for construction companies, as in the coming years, human capital plays a significant role in order to be a successful organization

    Cognitive demand modulates connectivity patterns of rostral inferior parietal cortex in cognitive control of language

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    The inferior parietal cortex (IPC) is involved in different cognitive functions including language. In line with the correlated transmitter receptor-based organization of the IPC, this part of the brain is parcellated into the rostral, the middle and the caudal clusters; however, the tripartite organization of the IPC has not been addressed in studies with a focus on cognitive control of language. Using multiband EPI, in this study we investigated how the rostral IPC contributes to this executive function in bilinguals. In doing so, we focused on the functional connectivity patterns of this part of the cortex with other brain areas in a context characterized with language engagement and disengagement that recruits the neural mechanisms of cognitive control. We found that in switching to L2, which was cognitively less demanding, the right rostral IPC had positive functional connectivity with the anterior division of the cingulate gyrus and the precentral gyrus. However, in switching to L1, which was cognitively more demanding, the right IPC rostral cluster had negative functional coupling with the postcentral gyrus and the precuneus cortex and positive connectivity with the posterior lobe of the cerebellum. In this condition, the left IPC rostral cluster had negative functional coupling with the superior frontal gyrus and the precuneus cortex. Thus, the connectivity patterns of the rostral IPC was influenced by the cognitive demand in an asymmetrical and lateral manner during cognitive control of language

    Connectivity Profile of Middle Inferior Parietal Cortex Confirms the Hypothesis About Modulating Cortical Areas

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    According to the correlated transmitter-receptor based structure of the inferior parietal cortex (IPC), this brain area is divided into three clusters, namely, the caudal, the middle and the rostral. Nevertheless, in associating different cognitive functions to the IPC, previous studies considered this part of the cortex as a whole and thus inconsistent results have been reported. Using multiband echo planar imaging (EPI), we investigated the connectivity profile of the middle IPC while forty-five participants performed a task requiring cognitive control. The middle IPC demonstrated functional associations which do not have similarities to a contributing part in the frontoparietal network, in processing cognitive control. At the same time, this cortical area showed negative functional connectivity with both the precuneus cortex, which is resting- state related, and brain areas related to general cognitive functions. That is, the functions of the middle IPC are not accommodated by the traditional categorization of different brain areas i.e. resting state-related or task-related networks and this advanced our hypothesis about modulating cortical areas. Such brain areas are characterized by their negative functional connectivity with parts of the cortex involved in task performance, proportional to the difficulty of the task; yet, their functional associations are inconsistent with the resting state-related cortical areas

    Dual Function of Primary Somatosensory Cortex in Cognitive Control of Language: Evidence from Resting State fMRI

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    Resting state functional connectivity can be leveraged to investigate bilingual individual differences in cognitive control of language; however, thus far no report is provided on how the connectivity profiles of brain functional networks at rest point to different language control behavior in bilinguals. In order to address this gap in state-of-the-art research we did a functional connectivity analysis on the resting state data acquired via multiband EPI to investigate three resting state networks of interest namely, the frontoparietal network (FPN), the salience network (SN), and the default mode network (DMN), which are related to cognitive control, between two groups of Dutch–English bilinguals based on how they performed in a language switching task. Results demonstrated that there is the increased coupling of the left primary somatosensory cortex with the dorsolateral prefrontal cortex in the group with better performance in cognitive control of language and the increased coupling of the right primary somatosensory cortex with the inferior parietal cortex in the group with poorer performance in this executive function. As regards these results, we claim that the primary somatosensory cortex has a dual function in coupling with the dorsolateral prefrontal cortex and the inferior parietal cortex in the FPN, and in fact, in what characterizes bilingual individual differences in cognitive control of language in healthy participants. The results of this study provide a model for future research in cognitive control of language and may serve as a reference in clinical neuroscience when bilinguals are diagnosed with dysfunction in cognitive control

    Cortical contributions to cognitive control of language and beyond: evidence from functional connectivity profiles of the inferior parietal cortex and cognitive control-related resting state networks

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    The resting state connectivity of the dorsolateral prefrontal cortex with the left primary somatosensory cortex and the functional association of the inferior parietal cortex (IPC) with the right primary somatosensory cortex indicate better and poorer performance in cognitive control of language, respectively. Besides, the task based connectivity profiles of the clusters of the IPC elucidate that it is not the whole part of this brain area that is involved in cognitive control, in the fronto-parietal network, but only the rostral cluster of the IPC. Moreover, the unique functional associations of the middle and the caudal IPC evidence that the traditional categorization of brain areas does not accommodate the functions of these parts of the cortex; the connectivity patterns of the middle and the caudal IPC have highlighted another brain functional category beyond the classic definitions, as modulating cortical areas, the functional connectivity of which are disparate from parts of the cortex involved in task performance and brain areas related to the resting state functionality of the brain.Theoretical and Experimental Linguistic

    A special breed of transformational leadership? Integrating conflict management and ethnicity into team coordination in multicultural temporary environments

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    Conflict is common during group activities, and how leaders deal with team members and the conflicts that arise in a project team environment can significantly affect team coordination. This study explores how conflict is dealt with by providing empirical evidence of relationships between transformational leadership style, conflict management styles and the ethnicity of leaders in multicultural project environments in the construction industry. The research extends conflict management style into the transformational leadership behaviour of team leaders to identify their effects on team coordination. Moreover, it evaluates how the ethnicity of leaders can moderate the relationships. This contribution is exceptional for bringing three moderating ethnic groups while drawing on data from 126 teams in the construction industry, using PLS path modelling to test our hypotheses. The results demonstrate that cooperative and conflict-avoiding management styles are positively related to team coordination. The judicious and considered use of the conflict-avoiding management style, in particular, should be recognised as an appropriate solution in certain multi-cultural team contexts by transformational leaders. Teams also exhibited stronger coordination when the team leader was nominated from a specific ethnic group. Possible directions in which future research can be structured are also outlined

    MSVIPER: Improved Policy Distillation for Reinforcement-Learning-Based Robot Navigation

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    We present Multiple Scenario Verifiable Reinforcement Learning via Policy Extraction (MSVIPER), a new method for policy distillation to decision trees for improved robot navigation. MSVIPER learns an "expert" policy using any Reinforcement Learning (RL) technique involving learning a state-action mapping and then uses imitation learning to learn a decision-tree policy from it. We demonstrate that MSVIPER results in efficient decision trees and can accurately mimic the behavior of the expert policy. Moreover, we present efficient policy distillation and tree-modification techniques that take advantage of the decision tree structure to allow improvements to a policy without retraining. We use our approach to improve the performance of RL-based robot navigation algorithms for indoor and outdoor scenes. We demonstrate the benefits in terms of reduced freezing and oscillation behaviors (by up to 95\% reduction) for mobile robots navigating among dynamic obstacles and reduced vibrations and oscillation (by up to 17\%) for outdoor robot navigation on complex, uneven terrains.Comment: 6 pages main paper, 2 pages of references, 5 page appendix (13 pages total) 5 tables, 9 algorithms, 4 figure
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