Mohammed Abdul karim - Academia.edu (original) (raw)

Papers by Mohammed Abdul karim

Abdul karim, 31

I’m Mohammed Abdul karim

arXiv (Cornell University), Dec 23, 2021

A class-incremental learning problem is characterized by training data becoming available in a ph... more A class-incremental learning problem is characterized by training data becoming available in a phase-by-phase manner. Deep learning models suffer from catastrophic forgetting of the classes in the older phases as they get trained on the classes introduced in the new phase. In this work, we show that the effect of catastrophic forgetting on the model prediction varies with the change in orientation of the same image, which is a novel finding. Based on this, we propose a novel data-ensemble approach that combines the predictions for the different orientations of the image to help the model retain further information regarding the previously seen classes and thereby reduce the effect of forgetting on the model predictions. However, we cannot directly use the data-ensemble approach if the model is trained using traditional techniques. Therefore, we also propose a novel dual-incremental learning framework that involves jointly training the network with two incremental learning objectives, i.e., the class-incremental learning objective and our proposed data-incremental learning objective. In the dualincremental learning framework, each image belongs to two classes, i.e., the image class (for class-incremental learning) and the orientation class (for data-incremental learning). In class-incremental learning, each new phase introduces a new set of classes, and the model cannot access the complete training data from the older phases. In our proposed data-incremental learning, the orientation classes remain the same across all the phases, and the data introduced by the new phase in class-incremental learning acts as new training data for these orientation classes. We empirically demonstrate that the dual-incremental learning framework is vital to the data-ensemble approach. We apply our proposed approach to state-of-the-art class-incremental learning methods and empirically show that our framework significantly improves the performance of these methods. Our proposed method significantly improves the performance of the stateof-the-art method (AANets) on the CIFAR-100 dataset by absolute margins of 3.30%, 4.28%, 3.55%, 4.03%, for the number of phases P=50, 25, 10, and 5, respectively, which establishes the efficacy of the proposed work.

Bangladesh Critical Care Journal

Iatrogenic tracheal rupture is a rare but recognized complication after endotracheal intubation. ... more Iatrogenic tracheal rupture is a rare but recognized complication after endotracheal intubation. Although rare, it carries high morbidity and mortality. Seemingly uneventful intubations can result in injury to the trachea requiring prompt diagnosis and management. Here, we report a patient of post intubation tracheal rupture who was successfully treated by conservative management. Bangladesh Crit Care J September 2022; 10(2): 163-165

Electronics, 2021

Due to the increase in electricity and diesel costs, solar photovoltaic pumping systems have beco... more Due to the increase in electricity and diesel costs, solar photovoltaic pumping systems have become a good solution, especially in rural areas. This work presents a standalone photovoltaic (PV) water pumping system (PVWPS) driven by an induction motor without energy storage to improve the pumping system’s performance. First, a comparison is made between two types: perturb and observe (P&O) method and incremental conductance (INC) MPPT method with a variable step size that is automatically adjusted. Studying these two techniques helps to understand which one can result in a system with less oscillation and greater efficiency when tracking the maximum power point from the PV panel under sudden irradiation conditions. This MPPT works on the operating duty cycle of the boost converter. Then, that converter combines with a voltage source inverter (VSI) to convert DC power to AC power. Second, we use indirect field-oriented control (IRFOC), which drives the three-phase of an induction mot...

P. 40: D"if3lip iiaa o m i T ' .to years ^^0 and 915 2 1 I Concerning the place of Salmon* s birt... more P. 40: D"if3lip iiaa o m i T ' .to years ^^0 and 915 2 1 I Concerning the place of Salmon* s birth it is very difficult, owing to the lack of historical information, to specify exactly where he was born, though some modern scholars have given different ô pinions on this issue. While Pinsker^ and Feuer-$ 7 stein are of the opinion that Salmon was born in g Egypt, Davidson thinks that Palestine was the place of his birth. Poznanski, on the other hand, rejects % the idea that Salmon came from Egypt, and maintains that this suggestion was probably invented by Firkowitsch to make it possible for Saadiah to have been the disciple of Salmon there.^ Poznanski*s argument % is based on the ground that, although Salmon*s state ment in his commentary on Psalm l40; 6 pNlDbN m nn^ 11' # ■. Or 9 0 9-9 1 4 according to I. Davidson*s argument (op. Pit., 6) that Salmon wrote the book in question in 9 3 4. On the other hand, however, Poznanski ('Karaite Miscellanies' , Jewish Quarterly Review,YIII (1896),0 8 8). believes that the date of composition was the year 940, and subsequently he places the date of Salmon* s birth between 915 and 920. Of. L, Nemoy, op^. ci t ., 69» Encyclopaedia Judaica (Jerusalem 197l)» XIV, 6 8 9. Op. cit. ,15, Qi? ,. 7 ■ ' ' ! " In his introduction to Der Commentar des Karâers « Salmon ben Jerucham zu den Klageliedern (Krakau 1898) , 7 * ^O p. c i t. , 6. 3 indicates that he did not live in Babylon, it nevertheless does not prove that Egypt was his home*^^ Salmon's statement cited above does not in fact rule ' ' ■ ' i out the possibility that he was of Iraqi origin, for S it says no more than that he was not in Iraq at the time of the composition of that particular work. The fifteenth century Karaite chronicler Ibn al-Hitl lists Salmon among the scholars of Iraq. He says: "The scholars in Baghdad and Iraq were the following: the two learned men, Abu al-Hasan ben 11 Masih and Salmon ben Yeruham." At the same time, Ibn al-Hltl indicates that Salmon lived for some time in Aleppo, from where he had written against Saadiah and where he also died. Ibn al-Hitx states that the grave of Salmon was known in Aleppo in his time as 9 S. Poznanski, 'Karaite Miscellanies', J ewi sh Quarterly Review, VII^,688f.^A nd accordingly Poznanski thinks that it is probable that he lived in Jerusalem. Cf. the repetition | of his opinion in 'Karaite Literary Opponents of Saadiah Gaon' , J ewish Quarterly Review, XVIII, 221. Gmoy (op. c it. __ , 60) and G. Vajda (o£. cit. , 8 n. 1) , however, admit the possibility that Salmon lived in Egypt for some time, probably on a study tour. 1 1 'Ibn al-Hltl's Arabic Chronicle of Karaite Î Doctors', ed. and translated by G. Margoliouth, Jewish Quarterly Review,IX(1897) , 434 : m ononi pNin'PNl I NT ill NO "73 nnTTi 11 iia*7Di r nm ii lon'^N iiN. I^Tbid., 434; lin'TD lip^ibn *>3 DTipH INbN nb p"'T3bN iipi oii^bN v n omi*» || tlie grave of a rigliteous man, and vovrs were still 1P made at it in Ibn al-Hlti* s time. ~ There is no ? valid reason to reject the chronology of the biography # 13 to this point. The same chronicler continues to the effect that Saadiah Gaon was still alive in Aleppo | when Salmon died and that he attended Salmon* s | funeral procession ' 'with his garment torn, girded with a rope, and barefoot ; and when he was blamed for it, he said: We both derived much profit from our controversies, and there is no doubt about his learning, and, therefore, have I acted as I have done."^^ Saadiah Gaon lived in Aleppo probably about 921• This is clear from a letter addressed by 1 5 Saadiah to his pupils, but Salmon at that time was just a boy of ten, and we know that he wrote some of his commentaries in the sixth decade of the tenth century, more than ten years after the death of 13 Zvi Ankori draws from this account of Salmon ben Yeruham* s funeral the conclusion of the existence of a Karaite community in Aleppo in the tenth century.

A study was conducted to screen parameters affecting the production of endoglucanase by Trichoder... more A study was conducted to screen parameters affecting the production of endoglucanase by Trichoderma reesei RUT C-30 on solid state fermentation of oil palm empty fruit bunch using the Plackett-Burman design. Factors involved in the screening process were peptone concentration, urea concentration, ammonium sulfate concentration, calcium nitrate concentration, yeast extract concentration, tween 80 concentration, pH, incubation time, initial moisture content, inoculum size and substrate amount. Through analysis of variance (ANOVA), it was found that initial moisture content (p= 0.001), incubation time (p= 0.001), inoculum size (p= 0.032) and ammonium sulfate concentration (p= 0.023) have been recognized as significant factors affecting endoglucanase activity in solid state fermentation (SSF) of oil palm empty fruit bunch (OPEFB) by T. reesei RUT C-30. The model established from the ANOVA analysis have a significant value of Pmodel>F= 0.0008 and R 2 of 0.9132. The preoptimized media ...

Require the economic development process in any country capital aggregated, where it is not possi... more Require the economic development process in any country capital aggregated, where it is not possible to verify rates desired development in the absence of formations of capitalism, and highlights the importance of capital markets in the process of economic development as one of the important mechanisms to collect private savings and public and directed towards investment channels varied in addition they represent a link between the sectors that are energy saving and has excess funding between sectors that lack liquidity to finance investment, which in turn serves the objectives of development in any country. Have confirmed many of Modern Applied Studies for the strong relationship between the evolution of the capital markets to economic growth rates. In general it can be said that the capital markets to pay the economic development process and economic growth through its number of jobs

This dissertation focuses on different aspects of face image analysis for accurate face recogniti... more This dissertation focuses on different aspects of face image analysis for accurate face recognition under low resolution and poor lighting conditions. A novel resolution enhancement technique is proposed for enhancing a low resolution face image into a high resolution image for better visualization and improved feature extraction, especially in a video surveillance environment. This method performs kernel regression and component feature learning in local neighborhood of the face images. It uses directional Fourier phase feature component to adaptively lean the regression kernel based on local covariance to estimate the high resolution image. For each patch in the neighborhood, four directional variances are estimated to adapt the interpolated pixels. A Modified Local Binary Pattern (MLBP) methodology for feature extraction is proposed to obtain robust face recognition under varying lighting conditions. Original LBP operator compares pixels in a local neighborhood with the center pi...

We present a practical algorithm for camera self-calibration dealing with varying parameters. Giv... more We present a practical algorithm for camera self-calibration dealing with varying parameters. Given a projective reconstruction, we retrieve the calibration matrices for each frame by minimizing a non-linear least square. We firstly start the minimization procedure by a stage of initialization to get a first estimation of the focal lengths, then, we start the estimation of the camera intrinsic parameters in a multistage algorithm, in each stage a parameter is estimated assuming some constraints on the other parameters. In the final stage a refinement of all parameters is done at once to allow them to vary freely. The robustness and accuracy of the

The experiment was undertaken to study the effect of collection techniques on cumulus oocyte comp... more The experiment was undertaken to study the effect of collection techniques on cumulus oocyte complexes (COCs) recovery, IN VITRO maturation (IVM) and IN VITRO fertilization (IVF) of goat oocytes. COCs were collected by three techniques viz. puncture, slicing and aspiration of goat ovaries obtained at slaughterhouse. It was observed that, the total number of COCs/ovary as well as the number of abnormal COCs/ovary were significantly higher (p < 0.01) in puncture (4.22 and 2.38, respectively) and slicing (4.14 and 2.22, respectively) followed by aspiration (3.28 and 0.80, respectively) technique. In contrast, the number of normal COCs/ovary was significantly higher (p < 0.01) in aspiration (2.48) followed by slicing (1.91) and puncture (1.85) techniques. Only normal quality COCs were cultured in TCM-199 supplemented with 2.5% bovine serum albumin (BSA) plus 10% goat follicular fluid (gFF). The matured COCs were then fertilized in BO medium with fresh buck semen. The results showed that the rates of COCs that reached the maximum cumulus cell expansion (level-3) were 64.14, 65.93 and 65.73%; metaphase-II (M-II) stage were 57.75, 58.23 and 58.57%; normal fertilization (formation of male and female pronuclei) were 34.43, 35.03 and 34.65% in puncture, slicing and aspiration techniques, respectively; there were no significant differences among these rates. The results revealed that the collection techniques have no significant effect (p > 0.05) on IN VITRO maturation and fertilization of goat oocytes as long as normal quality COCs was used.

International journal of imaging and robotics, 2014

Despite the quality of the results obtained during the last two decades by different algorithms a... more Despite the quality of the results obtained during the last two decades by different algorithms aiming to solve the problem of Structure From Motion-SFM, the use of color cameras all alone requires either an excessive number of devices (tens to several hundred), that cannot easily be available in practice, or may suffer from ambiguity in the 3D reconstruction of scenes. As an alternative, approaches based on multi-modal sensors, using different types of sensors, can provide compact system configurations requiring far fewer devices than mono-modal approaches, and without ambiguity in the 3D reconstruction. In this paper, we present a comprehensive study of a 3D acquisition system consisting of two pairs of Color and Time-of-Flight cameras. After briefly exploring the operating principles of Time-of-Flight cameras and the main practical problems of their implementations, we make a detailed study of different types of noise and errors in the measurements made by this type of cameras an...

International journal of humanities and social sciences, 2016

The paper investigates the effect of time pressure on Saudi students’ reading fluency on the basi... more The paper investigates the effect of time pressure on Saudi students’ reading fluency on the basis of the hypothesis that the time pressure alone can bring a significant change as the Saudi students are not motivated to utilize their acquired reading competence when they read something new. The study was conducted with 24 King Khalid University level 1 students from the science, commerce and arts faculties for 9 weeks. The students’ timed reading was found to have a significant impact on their reading speed and comprehension. At the end of the study, their reading speed increased from 30 WPM (Words Per Minute) to 40 WPM with the simultaneous improvement of reading comprehension—from the mean score of 3.95 to the mean score of 4.83 out of five.

Advances in Computational Intelligence, 2021

Journal of King Saud University - Science, 2016

The present generation of nutrient rich waste streams within the food and hospitality industry is... more The present generation of nutrient rich waste streams within the food and hospitality industry is inevitable and remained a matter of concern to stakeholders. Three white rot fungal strains were cultivated under submerged state bioconversion (SmB). Fermentable sugar conversion efficiency, biomass production and substrate utilization constant were indicators used to measure the success of the process. The substrates-banana peel (Bp), pineapple peel (PAp) and papaya peel (Pp) were prepared in wet and dried forms as substrates. Phanerochaete chrysosporium (P. chrysosporium), Panus tigrinus M609RQY, and RO209RQY were cultivated on sole fruit wastes and their composites. All fungal strains produced profound biomass on dry sole wet substrates, but wet composite substrates gave improved results. P. tigrinus RO209RQY was the most efficient in sugar conversion (99.6%) on sole substrates while P. tigrinus M609RQY was efficient on composite substrates. Elevated substrate utilization constant (K u) and biomass production heralded wet composite substrates. P. chrysosporium was the most performing fungal strain for biomass production, while PApBp was the best composite substrate.

International Biodeterioration & Biodegradation, 2015

Solid wastes emanating from food and hospitality domains constitute environmental challenges and ... more Solid wastes emanating from food and hospitality domains constitute environmental challenges and their holistic management remained inevitable. Solid state bioconversion process involving mixed culture of microbes was conducted for 7 days. Bio-product synthesis by the microorganisms and bio-degradation extent of fruit peels' components were analyzed for chemical and structural changes. Chemical analysis showed improved protein enrichment when microbes were mixed together at different ratios (141.18 mg/g) compared with 4 cm apart (115.62 mg/g). Through substrate reformulation, fermentable sugar composition rose to 500.99 mg/g and protein enrichment increased to 160.68 mg/g, cellulase activity was 1.33±0.04 units/ml and α-amylase activity of 112.46±0.28 units/ml was synthesized. Analysis of reformulated substrates indicated presence of more metabolizable sugar while FT-IR analysis revealed immense modifications and consumption of complex sugars (cellulose, hemicellulose and lignin) by selected filamentous fungi.

SAGE Open, 2015

This article argues that bad governance and corruption particularly in the Northern part of Niger... more This article argues that bad governance and corruption particularly in the Northern part of Nigeria have been responsible for the persistent rise in the activities of Jama’atu Ahlis Sunna Lidda’awati wal-Jihad (JASLWJ), Arabic for “people committed to the propagation of the tradition and jihad.” It is also known as “Boko Haram,” commonly translated as “Western education is sin.” Based on qualitative data obtained through interviews with Nigerians, this article explicates how poor governance in the country has created a vicious cycle of corruption, poverty, and unemployment, leading to violence. Although JASLWJ avows a religious purpose in its activities, it takes full advantage of the social and economic deprivation to recruit new members. For any viable short- or long-term solution, this article concludes that the country must go all-out with its anti-corruption crusade. This will enable the revival of other critical sectors such as agriculture and manufacturing, likely ensuring mo...

Journal of Electrochemical Science and Engineering, 2014

Electrokinetic decontamination and extraction have been proven to be one of the most viable, cost... more Electrokinetic decontamination and extraction have been proven to be one of the most viable, cost effective and emerging techniques in removing contaminants, especially heavy metals from soils for about last five decades. Basic concepts and an overview of the electrokinetic extraction processes and their potential applications in geotechnical and geoenvironmental engineering have been reviewed based on the literature and presented in this paper. Primarily, theoretical and laboratory experimental studies related to electroreclamation of soils are summarised in brief with basic concepts of electrokinetic processes. The paper has been divided into different sections that include history of electrokinetics, background and concepts, modelling, parameter effects, instrumentation, contaminant extraction, field applications, and summary and recommendation. Based on the review it is obvious that the field application of electrokinetic technology to remediate heavy metal contaminated soils /sediments is very limited and site specific. Additional laboratory studies and more pilot-and full-scale information from field applications are critical to the further understanding of the technology and to customize the process in different field conditions.