1,721,013 research outputs found
BN-AuthProf: Benchmarking Machine Learning for Bangla Author Profiling on Social Media Texts
No full textAuthor profiling, the analysis of texts to uncover attributes such as gender and age of the author, has become essential with the widespread use of social media platforms. This paper focuses on author profiling in the Bangla language, aiming to extract valuable insights about anonymous authors based on their writing style on social media. The primary objective is to introduce and benchmark the performance of machine learning approaches on a newly created Bangla Author Profiling dataset, BN-AuthProf. The dataset comprises 30,131 social media posts from 300 authors, labeled by their age and gender. Authors\u27 identities and sensitive information were anonymized to ensure privacy. Various classical machine learning and deep learning techniques were employed to evaluate the dataset. For gender classification, the best accuracy achieved was 80% using Support Vector Machine (SVM), while a Multinomial Naive Bayes (MNB) classifier achieved the best F1 score of 0.756. For age classification, MNB attained a maximum accuracy score of 91% with an F1 score of 0.905. This research highlights the effectiveness of machine learning in gender and age classification for Bangla author profiling, with practical implications spanning marketing, security, forensic linguistics, education, and criminal investigations, considering privacy and biases.Accepted to be Published in 2024 27th International Conference on Computer and Information Technology (ICCIT
Stress distribution of CFRP strengthened steel hollow sections under tension
No full textCarbon fibre reinforced polymer (CFRP) sheets have many outstanding properties such as high strength, high\ud
elastic modulus, light weight and good durability which are made them a suitable alternative for steel in\ud
strengthening work. This paper describe the ultimate load carrying capacity of steel hollow sections at effective\ud
bond length in terms of its cross sectional area and the stress distribution within bond region for different layers\ud
CFRP. It was found that depending on their size and orientation of uni- directional CFRP layers, the ultimate\ud
tensile load was different. Along with these tests, non linear finite element analysis was also performed to\ud
validate the ultimate load carrying capacity depending on their cross sections. The predicted ultimate loads\ud
from FE analysis are found very close to the laboratory test results. The validated model has been used to\ud
determine the stress distribution at bond joint for different orientation of CFRP. This research shows the effect\ud
of stress distribution and suitable wrapping layer to be used for the strengthening of steel hollow sections in\ud
tension
Suitability of IPO Pricing Methods to Overcome Underpricing: A Comparative Study in Bangladesh
Get PDFInitial Public Offering (IPO) mechanism gives a part of ownership of companies to small savers and enables investors to contribute to the economic development. This paper explores selected techniques by which companies going to public vary substantially across the world in the most studied market. In Bangladesh, there are two main methods of IPO pricing. One is Fixed Price (FP) method and another is Book Building (BB) method. It is difficult to isolate the impact of book building method relative to fixed price method which is used by the companies to go public. The empirical evidence demonstrates that most of the companies enter into capital market through FP method and BB method is the current issue in the capital market of Bangladesh. This study analyzes the trends of underpricing, overpricing, and oversubscription in initial public offerings (IPOs) listed in Dhaka Stock Exchange (DSE) and to what extent on a year to year basis. After introducing BB method in Bangladesh, 91 companies were listed in DSE during 2008-2015 except mutual fund and bond, out of which 87(95.60%) IPOs were listed through FP method and only 4(4.40%) were listed through BB method, and 89 (97.80%) IPOs were found to be underpriced, only 2 (2.20%) were overpriced while nothing is accurately priced. This research reveals that book building method may diminish the degree of underpricing and also compact the variance of over subscription considering all factors relating to IPOs in Bangladesh. Keywords: IPO, Fixed Price Method, Book Building Method, Primary Market, Underpricing
Impact of classroom interaction on English language learning at the secondary level of Bangladesh
Get PDFThis thesis report is submitted in partial fulfillment of the requirements for the degree of Masters of Arts in Teaching to Speakers of Other Languages, 2014.Cataloged from PDF version of Internship report.Includes bibliographical references (page 77-78).The term classroom interaction generally refers to the interaction between the teacher and learners, and amongst the learners, in the classroom. The aim of the study is to investigate how classroom interaction helps the students to learn English language. Earlier studies on classroom interaction focused on the language use by the teacher and learner, the interaction generated, and their effect on language learning. For this research the researcher has used both the qualitative (interview, FGD and observation) and quantitative (questionnaire survey) methodologies. The research said that “Classroom interaction is essential for learning English language”. Interaction is one of the issues occurred in the classroom that have a vital role in learning English language in the context of Bangladesh.Md. Ataur RahamanM. in TESO
Design and Development of a Segmented Rubbe-tracked Vehicle for Sepang Peat Terrain in Malaysia
Get PDFThe study describes the design and development of a segmented rubber tracked vehicle
for operating on unprepared peat terrain. The vehicle was to traverse accurately and
reliably on the 18.79k~lmlo~w bearing capacity peat terrain. The study observed four
main contributions towards determining the mechanical properties of peat terrain,
developing simulation models for optimizing the design parameters of the vehicle,
designing and developing the vehicle to be able to traverse accurately on low bearing
capacity peat terrain, and designing an innovative instrumentation system on the vehicle
for collecting relevant data to measure vehicle tractive performance.
An analytical framework for determining the mechanical properties of peat soil in view
of predicting the tractive performance of tracked vehicle was presented. It took into
account the load-sinkage and shearing characteristics of peat. An experimental study on
the mechanical properties of peat was conducted in Sepang, Selangor, Malaysia. The stiffness values of surface mat and underlying weak peat deposit from load-sinkage test
were determined by specially made bearing capacity apparatus. The mean values of
surface mat stiffness before and after drainage were found to be 31kN/m3 and 46k~lr-n~~
respectively. The mean value of underlying peat stiffness before and after drainage were
found to be 252kN/m3 and 380kN/m3, respectively. The mean value of internal frictional
angle, cohesiveness and shear deformation modulus of the peat soil sample were
determined using a direct shear box apparatus in the laboratory. The mean value of
internal frictional angle, cohesiveness and shear deformation modulus of the peat soil
before and after drainage were found to be 22.80" and 24.3 lo, 2.63kN/m2 and 2.89kN/m2,
and 1.2 1 cm and 1.37cm7 respectively.
A new simulation technique for studying the basic design parameters of the vehicle with
rigid link tracks system on Sepang peat terrain in Malaysia was also presented. The
proper track width, ground contact length, pitch and grouser height, idler diameter and
location, sprocket diameter and location, road-wheel diameter and geometrical
arrangement, the ratio of the road-wheel spacing to track pitch, location of the center ofgravity
(CG) of the vehicle are important to select to ensure good tractive performance of
the vehicle on unprepared peat terrain. Simulation technique was then used to optimize
the design parameters of the vehicle by establishing mathematical models for the trackterrain
interaction mechanism. In the simulation study, the 25.5kN vehicle including
payloads of 5.89kN was considered to traverse on the peat terrain at lOkm/h.
The simulation study for the vehicle of straight running motion showed that the nominal
ground pressure of the vehicle was 23.3% lower than the bearing capacity of the peat terrain. From simulated tractive performance results, vehicle average motion resistance
coefficient of 6.8 to 7.9%, drawbar pull coefficient of 25.22 to 47%, and tractive
efficiency of 74 to 77%, were found for the slippage of 5 to 20%. For the simulation
study on the vehicle of turning motion, the result showed that the vehicle ground contact
pressure exit from outer track was 14.61% and from the inner track was 6.67% lower
than the bearing capacity of the Sepang peat terrain, the sinkage of the vehicle outer track
10.5% lower and inner track 22.5% lower, torque of the outer track sprocket 7.85%
higher than the turning moment resistance of the vehicle, and lateral resistance 7.4%
higher than the centrifugal force of the vehicle which was ensured the vehicle to maintain
the steady state turn on the Sepang peat terrain at a turning speed of 1 Okm/h.
The vehicle field tests were conducted on three different types of peat terrains: Terrain
Type I, Terrain Type 11, and Terrain Type I11 with two loading conditions at travel speeds
of 6km.h and 10km.h. The results showed that the tractive effort of the vehicle was
increased 13.7 1 % for Terrain Type 1, 1 1 .O9% for Terrain Type 11, and 13.53% for
Terrain Type I11 when the traveling speed was increased from 6kmh to 10krnIh. From
the variation of the vehicle tractive operating environment, it was found that the tractive
effort of the vehicle at traveling speed of 6kmih increased 8.08%, 5.12%, and 14.14% for
changing the vehicle operating environment from Terrain Type I to Terrain Type 11,
Terrain Type I1 to Terrain Twe 111, and Terrain Type I to Terrain Type 111, respectively.
Similarly, the tractive effort for the vehicle at a traveling speed of lOkm/h increased
6.32%, 7.42%, and 14.22% for changing the vehicle operating environment from Terrain
Type I to Terrain Type 11, Terrain Type I1 to Terrain Type 111, and Terrain Type I to
Terrain Type 111, respectively. Furthermore, the tractive effort of the vehicle at a traveling speed of 6kmh increased 2.28% for Terrain Type I, 5.124% for Terrain Type 11, and
6.46% for Terrain Type 111 when the vehicle changing operating loading condition from
without payload to with full payload. Similarly, the tractive effort of the vehicle at a
traveling speed of 1Okm/h increased 1.76% for Terrain Type I, 2.61% for Terrain Type 11,
and 6.69% for Terrain Type I11 when the vehicle changing operating loading condition
from without payload to with full payload
SOMATIC EMBRYOGENESIS OF STEVIA (Stevia rebaudiana Bert.)
Get PDFA Thesis
Submitted to the Department of Horticulture
Sher-e-Bangla Agricultural University, Dhaka
in partial fulfillment of the requirements
for the degree
of
MASTER OF SCIENCE (MS)
IN
HORTICULTUREThe experiment was conducted at the Laboratory of Biotechnology
Division, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh.
Leaf and nodal segments were cultured on MS media supplemented with
varying concentrations (0.0, 0.1, 0.2, 0.3 and 0.4 mg/L) of 2,4-D for callus
induction. The highest amount of callus 26.38%, 48.50% and 72.15% at 14, 21
and 28 days after inoculation in dark phase was produced in the MS medium
with 0.4 mg/L 2,4-D. Interaction effects of media supplemented with NAA (a
napthanlene acetic acid), Kn (Kinetin) and BAP (6-benzyl amino purine) were
significant for somatic embryo induction. Among the three media the highest
amount of somatic embryo was obtained in MS media supplemented with 5.0
mg/L Kn, 10.0 mg/L Kn and 1.0 mg/L BAP respectively. The highest amount
of plant regeneration was obtained in MS media supplemented with 0. 1 mg/L
NAA + 2.0 mg/L BAP. The best response towards root number and root length
was obtained from MS media supplemented with 0.2 mg/L IBA. Finally the
regenerated plantlets were successfully established into the pots after proper
hardening
Experimental Investigation and Analytical Modeling of Masonry Wall for In-Plane Shear Strength after Strengthening by Various FRPs
No full text(主査) 教授 上田 多門, 教授 横田 弘, 教授 松本 高志, 准教授 佐藤 靖彦工学院（北方圏環境政策工学専攻
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