Sex-Related Differences in Visual-Orientation Discrimination Thresholds

Abdullah Bin Dawood 서울대학교 인지과학연구소 2023 Journal of Cognitive Science Vol.24 No.2

Visually induced peak gamma frequency was associated with lower orientation discrimination (OD) thresholds and was higher for females than males. Accordingly, females would be expected to have lower OD thresholds than males. However, behavioural evidence suggests the opposite as males outperformed females in several visual perceptual tasks, such as visual acuity and orientation identification tasks. The current exploratory study aimed to investigate whether there would be differences in OD thresholds between neurotypical adult females and males using a visual-orientation discrimination task (ODT). The ODT is a low-level psychophysical task comprising vertical and oblique conditions and is suggested to indicate cortical Excitation-Inhibition (E-I) balance in the visual cortex. The results showed that females and males had lower OD thresholds in the vertical condition than in the oblique condition, reflecting the well-known oblique effect. Unexpectedly, the results also showed that females had higher OD thresholds in the vertical and oblique conditions than males, indicating potential differences in cortical E-I balance between females and males. Possible explanations for the sex-related differences in ODT performance are addressed.

Directional Age-Primitive Pattern (DAPP) for Human Age Group Recognition and Age Estimation

Bin Iqbal, Md Tauhid,Shoyaib, Mohammad,Byungyong Ryu,Abdullah-Al-Wadud, M.,Oksam Chae IEEE 2017 IEEE transactions on information forensics and sec Vol.12 No.11

<P>An appropriate aging description from face image is the prime influential factor in human age recognition, but still there is an absence of a specially engineered aging descriptor, which can characterize discernible facial aging cues (e.g., craniofacial growth, skin aging) from a detailed and more finer point of view. To address this issue, we propose a local face descriptor, directional age-primitive pattern (DAPP), which inherits discernible aging cue information and is functionally more robust and discriminative than existing local descriptors. We introduce three attributes for coding the DAPP description. First, we introduce Age-Primitives encoding aging related to the most crucial texture primitives, yielding a reasonable and clear aging definition. Second, we introduce an encoding concept dubbed as Latent Secondary Direction, which preserves compact structural information in the code avoiding uncertain codes. Third, a globally adaptive thresholding mechanism is initiated to facilitate more discrimination in a flat and textured region. We apply DAPP on separate age group recognition and age estimation tasks. Applying the same approach to both of these tasks is seldom explored in the literature. Carefully conducted experiments show that the proposed DAPP description outperforms the existing approaches by an acceptable margin.</P>

Experimenting biochemical oxygen demand decay rates of Malaysian river water in a laboratory flume

Nuruzzaman,Abdullah Al-Mamun,Noor Bin Salleh 대한환경공학회 2018 Environmental Engineering Research Vol.23 No.1

Lack of information on the Biochemical Oxygen Demand (BOD) decay rates of river water under the tropical environment has triggered this study with an aim to fill the gap. Raw sewage, treated sewage, river water and tap water were mixed in different proportions to represent river water receiving varying amounts and types of wastewater and fed in a laboratory flume in batch mode. Water samples were recirculated in the flume for 30 h and BOD and Carbonaceous BOD (CBOD) concentrations were measured at least six times. Decay rates were obtained by fitting the measured data in the first order kinetic equation. After conducting 12 experiments, the range of BOD and CBOD decay rates were found to be 0.191 to 0.92 per day and 0.107 to 0.875 per day, respectively. Median decay rates were 0.344 and 0.258 per day for BOD and CBOD, respectively, which are slightly higher than the reported values in literatures. A relationship between CBOD decay rate and BOD decay rate is proposed as kCBOD = 0.8642kBOD - 0.0349 where, kCBOD is CBOD decay rate and kBOD is BOD decay rate. The equation can be useful to extrapolate either of the decay rates when any of the rates is unknown.

Physiological Changes, Growth and Flowering Responses of Curcuma alismatifolia var chiangmai Pink to Shading

Thohirah Le. Abdullah,Mohd Fauzi Bin Ramlan,Flora Lee Sa Chin 한국원예학회 2006 한국원예학회 기타간행물 Vol.- No.-

Serum Prolactin and Bone Mineral Density in Schizophrenia: A Systematic Review

John Lally,Abdullah Bin Sahl,Kieran C. Murphy,Fiona Gaughran,Brendon Stubbs 대한정신약물학회 2019 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.17 No.3

The relationship between serum prolactin and bone mineral density (BMD) in schizophrenia is unclear. We conducted a literature review of databases from inception until December 2018 for cross-sectional, case-control, prospective and retrospective studies analyzing correlations between serum prolactin and BMD measured using dual energy X-ray absorptiometry or quantitative ultrasound at any skeletal site in people with schizophrenia. Data was summarized with a best evidence synthesis. This review identified 15 studies (1 longitudinal study, 10 cross-sectional and 4 case-control studies; 1,360 individuals with a psychotic disorder; mean age 45.1 ± 9.4 [standard deviation] years, female 742 [54.6%], mean illness duration 17.7 ± 11.3 years) assessing the relationship between serum prolactin and BMD in schizophrenia. There was a statistically significant inverse correlation between serum prolactin and BMD identified in eight of the studies (53% of all studies), suggesting mixed evidence for an association between serum prolactin and BMD. Of those studies which identified a significant inverse correlation between serum prolactin and BMD (n = 5), 152 (52.1%) of patients were treated with prolactin raising antipsychotics, compared to 197 (48.1%) of patients in those studies which did not identify a significant correlation between prolactin and BMD. Available studies cannot resolve the link between excess prolactin and reduced BMD in schizophrenia. Future studies should be longitudinal in design and combine measures of serum prolactin along with other risk factors for reduced BMD such as smoking and vitamin D and sex hormone levels in assessing the relationship between prolactin and BMD in schizophrenia.

Evaluation on feedstock, technologies, catalyst and reactor for sustainable biodiesel production: A review

Mohd Nurfirdaus Bin Mohiddin,Yie Hua Tan,Yee Xuan Seow,Jibrail Kansedo,N.M. Mubarak,Mohammad Omar Abdullah,Yen San Chan,Mohammad Khalid 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.98 No.-

The ever-detrimental condition of the environment due to the fossil fuel utilization has catalyzed thedevelopment of biodiesel. Biodiesel is produced mainly via transesterification and the entire processcomprises of several major components; the feedstock, the catalyst, the reaction, and the productseparation or purification. There are various factors affecting the amount and quality of biodieselproduced, such as the type and amount of feedstock and catalyst, alcohol-to-feedstock ratio, and reactiontemperature and time. The performance of biodiesel reactors in providing energy and time efficientbiodiesel production is also among the subject of recent studies. To produce biodiesel commercially andefficiently, it is important to recognize the novel technologies that are promising for biodiesel production. With this in mind, this article presents a review of the recent advancement and classification of thefeedstock, the catalyst for biodiesel production, and the biodiesel production reactor. Furthermore, thisarticle also highlights the development and application of oil extraction techniques, biochar as a biodieselcatalyst, and the magnetic biodiesel catalyst. The biodiesel production reactor and parametersoptimization are also discussed in this article in order to provide a better context on the chemicalreaction.

The Interplay between the Psychological Factors and Entrepreneurial Intention: An Empirical Investigation

SHAHNEAZ, Mir Abdullah,AMIN, Mohammad Bin,ENI, Lima Nasrin Korea Distribution Science Association 2020 The Journal of Asian Finance, Economics and Busine Vol.7 No.12

The domain of entrepreneurship has been dotted across various paradigms. Identifying and examining entrepreneurial intention and propensity to it spontaneously require the insight from the lens of psychological approach. The aim of this study is to examine the influence and impact of psychological factors on entrepreneurial intention; as it is found that in Bangladeshi context several entrepreneurship studies are undertaken, still the exploratory research on interplay between the psychological factors (i.e., self-confidence, locus of control, need for achievement, and tolerance for ambiguity) and entrepreneurial intention has been merely found. The study has chosen Bangladeshi university students as the unit of analysis and the ultimate sample size in this research is n=265. The current paper is a quantitative study where sampling method is followed by convenience sampling technique, and study data is collected through survey questionnaire. Data has been compiled into SPSS whereas, for hypotheses assessment, Smart PLS software is applied. The results reflect that self-confidence, locus of control, and need for achievement are revealed as contributory determinants of entrepreneurial intention while tolerance for ambiguity is found as an insignificant predictor. The current research is expected to offer an in-depth understanding about the significance of psychological factors in examining entrepreneurial intention.

Wireless LAN Access Point Placement Based on User Mobility

Taufiq, Muhammad,Abdullah, Mohd Fikri Azli bin,Choi, Deokjai Springer-Verlag 2011 WIRELESS PERSONAL COMMUNICATIONS Vol.60 No.3

PRESSURE BASED ROUTING PROTOCOL FOR UNDERWATER WIRELESS SENSOR NETWORKS: A SURVEY

Khasawneh, Ahmad,Bin Abd Latiff, Muhammad Shafie,Chizari, Hassan,Tariq, MoeenUddin,Bamatraf, Abdullah Korean Society for Internet Information 2015 KSII Transactions on Internet and Information Syst Vol.9 No.2

Underwater wireless sensor networks (UWSNs) are similar to the terrestrial sensor networks. Nevertheless, there are different characteristics among them such as low battery power, limited bandwidth and high variable propagation delay. One of the common major problems in UWSNs is determining an efficient and reliable routing between the source node and the destination node. Therefore, researchers tend to design efficient protocols with consideration of the different characteristics of underwater communication. Furthermore, many routing protocols have been proposed and these protocols may be classified as location-based and location-free routing protocols. Pressure-based routing protocols are a subcategory of the location-free routing protocols. This paper focuses on reviewing the pressure-based routing protocols that may further be classified into non-void avoidance protocols and void avoidance protocols. Moreover, non-void avoidance protocols have been classified into single factor based and multi factor based routing protocols. Finally, this paper provides a comparison between these protocols based on their features, performance and simulation parameters and the paper concludes with some future works on which further study can be conducted.

An Efficient Game Theory-Based Power Control Algorithm for D2D Communication in 5G Networks

( Abdu Saif ),( Kamarul Ariffln Bin Noordin ),( Kaharudin Dimyati ),( Nor Shahida Mohd Shah ),( Yousef Ali Al-gumaei ),( Qazwan Abdullah ),( Kamal Ali Alezabi ) 한국인터넷정보학회 2021 KSII Transactions on Internet and Information Syst Vol.15 No.7

Device-to-Device (D2D) communication is one of the enabling technologies for 5G networks that support proximity-based service (ProSe) for wireless network communications. This paper proposes a power control algorithm based on the Nash equilibrium and game theory to eliminate the interference between the cellular user device and D2D links. This leads to reliable connectivity with minimal power consumption in wireless communication. The power control in D2D is modeled as a non-cooperative game. Each device is allowed to independently select and transmit its power to maximize (or minimize) user utility. The aim is to guide user devices to converge with the Nash equilibrium by establishing connectivity with network resources. The proposed algorithm with pricing factors is used for power consumption and reduces overall interference of D2Ds communication. The proposed algorithm is evaluated in terms of the energy efficiency of the average power consumption, the number of D2D communication, and the number of iterations. Besides, the algorithm has a relatively fast convergence with the Nash Equilibrium rate. It guarantees that the user devices can achieve their required Quality of Service (QoS) by adjusting the residual cost coefficient and residual energy factor. Simulation results show that the power control shows a significant reduction in power consumption that has been achieved by approximately 20% compared with algorithms in [11].