Diversity Profiling of Learners to Understand Their Domain Coverage While Watching Videos
Conference paperModelling diversity is especially valuable in soft skills learning, where contextual awareness and understanding of different perspectives are crucial. This paper presents an application of a diversity analytics pipeline to generate domain diversity profiles for learners as captured in their comments while watching videos for learning a soft skill. The datasets for analysis were collected from a series of studies on learning presentation skills with Active Video Watching system (AVW-Space). Two user studies (with 37 postgraduates and 140 undergraduates, respectively) were compared. The learners’ diversity and personal profiles are used to further understand and highlight any notable patterns about their domain coverage on presentation skills.
Entisar Nassr Abdulati Abolkasim, (09-2018), Springer, Cham: Springer, 561-565
Ontology-based Domain Diversity Profiling of User Comments
Conference paperDiversity has been the subject of study in various disciplines from biology to social science and computing. Respecting and utilising the diversity of the population is increasingly important to broadening knowledge. This paper describes a pipeline for diversity profiling of a pool of text in order to understand its coverage of an underpinning domain. The application is illustrated by using a domain ontology on presentation skills in a case study with 38 postgraduates who made comments while learning pitch presentations with the Active Video Watching system (AVW-Space). The outcome shows different patterns of coverage on the domain by the comments in each of the eight videos.
Entisar Nassr Abdulati Abolkasim, (06-2018), Springer, Cham: Springer, 3-8
Contribution of transition 2 and stabilization processes to 3 speciation is a function of the ancestral trait state and selective 4 environment in Hakea
مقال في مجلة علميةCurrently the origin and trajectories of novel traits are emphasised in evolutionary studies, the
role of stabilization is neglected, and interpretations are often post hoc rather than as
hypothesised responses to stated agents of selection. Here we evaluated the impact of
changing environmental conditions on trait evolution and stabilization and their relative
contribution to diversification in a prominent Australian genus, Hakea (Proteaceae). We
assembled a time-based phylogeny for Hakea, reconstructed its ancestral traits for six
attributes and determined their evolutionary trajectories in response to the advent or
increasing presence of fire, seasonality, aridity, nectar-feeding birds and (in)vertebrate
herbivores/granivores. The ancestral Hakea arose 18 million years ago (Ma) and was broad
leaved, non-spinescent, insect-pollinated, had medium-sized, serotinous fruits and resprouted
after fire. Of the 190 diversification events that yielded the 82 extant species analysed, 8−50%
involved evolution, stabilization or re-evolution (reversal) of individual novel traits.
شهوب محممد أمحمد الأحمر، Byron B. Lamont، (10-2017)، استراليا: تم اختياره bioRxiv Journal، 1 (10)، 1-33
Bagged textural and color features for melanoma skin cancer detection in dermoscopic and standard images.
Journal ArticleAbstract—Early detection of malignant melanoma skin cancer is crucial for treating the disease and saving lives. Many computerized techniques have been reported in the literature to diagnose and classify the disease with satisfactory skin cancer detection performance. However, reducing the false detection rate is still challenging and preoccupying because false positives trigger the alarm and require intervention by an expert pathologist for further examination and screening. In this paper, an automatic skin cancer diagno- sis system that combines different textural and color features is proposed. New textural and color features are used in a bag-of-features approach for efficient and accurate detection. We particularly claim that the Histogram of Gradients (HG) and the Histogram of Lines (HL) are more suitable for the analysis and clas- sification of dermoscopic and standard skin images than the conventional Histogram of Oriented Gradient (HOG) and the Histogram of Oriented Lines (HOL), respectively. The HG and HL are bagged separately us- ing a codebook for each and then combined with other bagged color vector angles and Zernike moments to exploit the color information. The overall system has been assessed through intensive experiments using different classifiers on a dermoscopic image dataset and another standard dataset. Experimental results have shown the superiority of the proposed system over state-of-the-art techniques.
Naser Alfed, Fouad Khelifi, (08-2017), Elsevier: Expert Systems With Applications, Elsevier, 90 (90), 101-110
Functional and genetic evidence that nucleoside transport is highly conserved in Leishmania species: Implications for pyrimidine-based chemotherapy
Journal ArticleLeishmania pyrimidine salvage is replete with opportunities for therapeutic intervention with enzyme inhibitors or antimetabolites. Their uptake into cells depends upon specific transporters; therefore it is essential to establish whether various Leishmania species possess similar pyrimidine transporters capable of drug uptake. Here, we report a comprehensive characterization of pyrimidine transport in L. major and L. mexicana. In both species, two transporters for uridine/adenosine were detected, one of which also transported uracil and the antimetabolites 5-fluoruracil (5-FU) and 5F,2'deoxyuridine (5F,2'dUrd), and was designated uridine-uracil transporter 1 (UUT1); the other transporter mediated uptake of adenosine, uridine, 5F,2'dUrd and thymidine and was designated Nucleoside Transporter 1 (NT1). To verify the reported L. donovani model of two NT1-like genes encoding uridine/adenosine transporters, and an NT2 gene encoding an inosine transporter, we cloned the corresponding L. major and L. mexicana genes, expressing each in T. brucei. Consistent with the L. donovani reports, the NT1-like genes of either species mediated the adenosine-sensitive uptake of [3H]-uridine but not of [3H]-inosine. Conversely, the NT2-like genes mediated uptake of [3H]-inosine but not [3H]-uridine. Among pyrimidine antimetabolites tested, 5-FU and 5F,2'dUrd were the most effective antileishmanials; resistance to both analogs was induced in L. major and L. mexicana. In each case it was found that the resistant cells had lost the transport capacity for the inducing drug. Metabolomics analysis found that the mechanism of action of 5-FU and 5F-2'dUrd was similar in both Leishmania species, with major changes in deoxynucleotide metabolism. We conclude that the pyrimidine salvage system is highly conserved in Leishmania species - essential information for the development of pyrimidine-based chemotherapy.
Juma Ahmed Mohamed Ali, (08-2017), Netherlands: International journal for parasitology. Drugs and drug resistance, 2 (7), 206-226
Hybrid technique for robust image watermarking using discrete time fourier transform
Conference paperThe current paper proposes a novel scheme for non-blind watermarking of images, making use of discrete wavelet transform (DWT), discrete time Fourier transform (DTFT), as well as singular value decomposition, or SVD. During the process of embedding, 1-level DWT is used to decompose the host image into its various frequency sub-bands. After this, the high-frequency sub band receives an application of DTFT. This is followed then by SVD, after which the watermark becomes embedded into the now-transformed host image's singular matrix. Then, the inverses of 1-level DWT, DTFT and SVD are applied in order to obtain a watermarked final image. This paper evaluates the performance of the proposed method of watermarking against a number of attacks, including sharpening, salt and pepper noise, AWGN, gamma correction, histogram equalisation, flipping and cropping. Results obtained during experiments have found that the scheme as proposed does provide high levels of robustness and imperceptibility against various signal processing attacks.
Omar Moftah Ibrahim Abodena, Erbug Celebi, Mary Agoyi, (05-2017), 2017 25th IEEE Signal Processing and Communications Applications Conference: IEEE, 1-4
The Impact of Water and Some Salt Solutions on Some Properties of Hydrophilic Acrylamide Copolymeric Hydrogels
Journal ArticleAbstract-A series of polyelectrolyte hydrogels ranging from 92-98wt% were synthesized by copolymerization of acrylamide,
AAM with 2-acrylamido-2-methyl propane sulphonic acid, AMPS using 0.001g APS as initiator in the presence of 30wt% H2O
and 1.0wt% ethylene glycol dimethacrylate,EDMA as cross-linking agent. The final copolymers was obtained in the form of
glassy and transparent roads at room temperature, these roads were soaked in water for two days to remove unreacted
monomers. The swelling behavior of the hydrogels was studied in distilled water and salt solutions of 1.5 mol/l each of NaCl
and KCl. The Swelling in water shows decreasing values of q, LE, Ø1, EWC% and increasing polymer volume fraction, Ø2 by
increasing acrylamide, due to increasing hydrophobicity and decreasing the hydrophilicity. The swelling in salt solutions
shows a decreasing in the values of ESSNa%, WCNa%, SCNa%, ESSK%, WCK% and SCK% by increasing acrylamid
monomer in the feed due to increasing the hydrophobicity and decreasing the ionized ionic groups (SO3H). The increasing
values of ESSNa%, WCNa% and SCNa% compared with the values of ESSK%, WCK% and SCK% respectively, is due to
the higher charge density of sodium ion than that of potassium ion.
Shhoob Mohamed imhmed Elahmir, Abdurhman A.Abuabdalla Khalifa1, (01-2017), ابريطانيا: MAYFEB Journal of Materials Science, 1 (1), 7-16
Small-seeded Hakea species tolerate cotyledon loss better than large-seeded congeners
Journal ArticleSix Hakea species varying greatly in seed size were selected for cotyledon damage experiments. The
growth of seedlings with cotyledons partially or completely removed was monitored over 90 days. All
seedlings perished by the fifth week when both cotyledons were removed irrespective of seed size.
Partial removal of cotyledons caused a significant delay in the emergence of the first leaf, and reduction
in root and shoot growth of the large-seeded species. The growth of seedlings of small-seeded species
was less impacted by cotyledon damage. The rate of survival, root and shoot lengths and dry biomass
of the seedlings were determined after 90 days. When seedlings were treated with balanced nutrient
solutions following removal of the cotyledons, survival was 95–98%, but 0% when supplied with
nutrient solutions lacking N or P or with water only. The addition of a balanced nutrient solution failed
to restore complete growth of any species, but the rate of root elongation for the small-seeded species
was maintained. Cotyledons provide nutrients to support early growth of Hakea seedlings, but other
physiological roles for the cotyledons are also implicated. In conclusion, small-seeded Hakea species can
tolerate cotyledons loss better than large-seeded species.
Shhoob Mohamed imhmed Elahmir, Byron B. Lamont, Tianhua He, (01-2017), استراليا: Scientific Reports, 7 (1), 1-9
Pedestrian Gap Acceptance and Crossing Decision outside Crossing Facilities along Urban Streets in Malaysia: A Case Study of Rughaya Street, Batu Pahat, Johor, Malaysia
Journal ArticleAbstract
Walking considered as one of the safest modes of
travel available, sustainable to human society as well as
environmentally beneficial. In this context, the aim of this
research is to investigate pedestrians’ traffic gap acceptance
and crossing decision for Mid-block Street crossing in urban
areas in Malaysia. Pedestrian crossing behaviour at
Rughaya Street has been examined in terms of the decision
to cross or not the street and size of traffic gaps accepted by
pedestrian, as well as the related contributing factors. A
field study was conducted to collect the data of pedestrians’
decisions under real mix traffic Condition using video
camera on a typical unsignalized urban street section. JPEG
files were obtained from video recording by using Snapshot
Wizard software. The data extracted included traffic
characteristics such as traffic size, traffic speed, etc.
pedestrian individual characteristics such as gender, in
addition to individual behavior such as waiting, frequency
of attempt, etc.). Furthermore, The extracted data were
used to develop and examine a pedestrian gap acceptance
model based on A lognormal regression model and binary
logistic model by SPSS (22) in order to validate the impact
of various parameters on the size of traffic gaps accepted by
pedestrians as well as the effect on the decision of
pedestrians to cross the street or not. So that the effect of
the gap accepted available and of other factors on the
decision of pedestrians to cross the street or not is examined.
These results indicate that the data set for this particular
location has a majority of male pedestrians which were
insignificant variables in both models moreover a lognormal
regression results shows that accepted gaps size depend on
traffic size, crossing distance, speed of approaching vehicle
and time spent by pedestrian at the curb waiting for a
suitable gap size to start crossing. The BL model performs
well for the reason that it captures the pedestrian decision
making process with traffic taking the relevant attributes
into consideration. According to the coefficients of BL
regression analysis equation we noticed that the illegal
parking, traffic size, traffic waiting time and gap size are the
vital attributes for the Pedestrian gap acceptance model..
Index Terms: Pedestrian crossing, gap acceptance, crossing
decision, multiple linear regression, binary logistic
regression.
Issam Omran m.f alajnaf, Moftah Masoud Almadani, Khaled Mohammad A Emhamed, (12-2016), ماليزيا: THE INTERNATIONAL JOURNAL OF ENGINEERING AND INFORMATION TECHNOLOGY, 1 (3), 18-22
A semantic-driven model for ranking digital learning objects based on diversity in the user comments
Conference paperThis paper presents a computational model for measuring diversity in terms of variety, balance and disparity. This model is informed by the Stirling’s framework for understanding diversity from social science and underpinned by semantic techniques from computer science. A case study in learning is used to illustrate the application of the model. It is driven by the desire to broaden learners’ perspectives in an increasingly diverse and inclusive society. For example, interpreting body language in a job interview may be influenced by the different background of observers. With the explosion of digital objects on social platforms, selecting the appropriate ones for learning can be challenging and time consuming. The case study uses over 2000 annotated comments from 51 YouTube videos on job interviews. Diversity indicators are produced based on the comments for each video, which in turn facilitate the ranking of the videos according to the degree of diversity in the comments for the selected domain.
Entisar Nassr Abdulati Abolkasim, (09-2016), Springer: Springer, 3-15