A Survey of Software Development Process Models in Software Engineering

Iqbal H. Sarker1,Faisal Faruque,Ujjal Hossen,Atikur Rahman 보안공학연구지원센터 2015 International Journal of Software Engineering and Vol.9 No.11

Software has been a significant part of modern society for a long time. In particular, this paper is concerned with various software development process models. Software process model is a description of the sequence of activities carried out in a software engineering project, and the relative order of these activities. It represents some of the development models namely, waterfall, v-shaped, incremental, RAD, iterative spiral and agile model. Therefore, the main objective of this paper is to represent different models of software development and different aspects of each model to help the developers to select specific model at specific situation depending on customer demand.

Dynamic ID randomization for user privacy in mobile network

Arijet Sarker(Arijet Sarker ),SangHyun Byun(SangHyun Byun),Manohar Raavi(Manohar Raavi ),Jinoh Kim(Jinoh Kim),Jonghyun Kim(Jonghyun Kim),Sang-Yoon Chang(Sang-Yoon Chang) 한국전자통신연구원 2022 ETRI Journal Vol.44 No.6

Mobile and telecommunication networking uses temporary and random identifiers (IDs) to protect user privacy. For greater intelligence and security o the communications between the core network and the mobile user, we design and build a dynamic randomization scheme for the temporary IDs for mobile networking, including 5G and 6G. Our work for ID randomization (ID-RZ) advances the existing state-of-the-art ID re-allocation approach in 5G in the following ways. First, ID-RZ for ID updates is based on computing, as opposed to incurring networking for the re-allocation-based updates, and is designed for lightweight and low-latency mobile systems. Second, ID-RZ changes IDs proactively (as opposed to updating based on explicit networking event triggers) and provides stronger security (by increasing the randomness and frequency of ID updates). We build on the standard cryptographic primitives for security (e.g., hash) and implement our dynamic randomization scheme in the 5G networking protocol to validate its design purposes, which include time efficiency (two to four orders of magnitude quicker than the re-allocation approach) and appropriateness for mobile applications.

Extracts of Centaurea bornmuelleri and Centaurea huber-morathii inhibit the growth of colon cancer cells in vitro

Sarker, Satyajit Dey,Shoeb, Mohammad,Celik, Sezgin,Jaspars, Marcel,Nahar, Lutfun,Kong-Thoo-Lin, Paul,MacManus, Stephen M Kyung Hee Oriental Medicine Research Center 2007 Oriental pharmacy and experimental medicine Vol.7 No.4

Plants from the genus Centaurea (C.) (Family: Asteraceae alt. Compositae), widely distributed in Asia, Europe and North America, have traditionally been used in the treatment of various ailments. As a part of our on-going studies on the plants from the genus C. for their phytochemistry and biological activities, extracts of the seeds of Turkish endemic C. species, C. bornmuelleri and C. huber-morathii, were tested for their cytotoxicity towards the CaCo2 colon cancer cell line as well as for the toxicity towards the brine shrimps, using the MTT and the brine shrimp lethality assays, respectively. Among the extracts, the MeOH extract of these plants showed significant toxicity towards the brine shrimps ($LD_{50}=55.2{\times}10^{-2}\;and\;42.4{\times}10^{-2}mg/ml$, respectively). The MeOH extract of both C. species also inhibited the growth of CaCo2 colon cancer cells in the MTT assay ($IC_{50}$=29.9 and 33.0 g/ml, respectively). As the most prominent activities in both assays were observed with the MeOH extracts, it can be assumed that the compound(s) responsible for these activities are polar in nature.

Flexible and Transparent Plastic Electrodes Composed of Reduced Graphene Oxide/Polyaniline Films for Supercapacitor Application

Sarker, Ashis K.,Hong, Jong-Dal Korean Chemical Society 2014 Bulletin of the Korean Chemical Society Vol.35 No.6

In this article, we described about the preparation and electrochemical properties of a flexible energy storage system based on a plastic polyethylene terephthalate (PET) substrate. The PET treated with UV/ozone was fabricated with multilayer films composed of 30 polyaniline (PANi)/graphene oxide (GO) bilayers using layer-by-layer assembly of positively charged PANi and negatively charged GO. The conversion of GO to the reduced graphene oxide (RGO) in the multilayer film was achieved using hydroiodic acid vapor at $100^{\circ}C$, whereby PANi structure remained nearly unchanged except a little reduction of doping state. Cyclic voltammetry and charge/discharge curves of 30 PANi/RGO bilayers on PET substrate (shorten to PANi-$RGO_{30}$/PET) exhibited an excellent volumetric capacitance, good cycling stability, and rapid charge/discharge rates despite no use of any metal current collectors. The specific capacitance from charge/discharge curve of the PANi-$RGO_{30}$/PET electrode was found to be $529F/cm^3$ at a current density of $3A/cm^3$, which is one of the best values yet achieved among carbon-based materials including conducting polymers. Furthermore, the intrinsic electrical resistance of the PANi-$RGO_{30}$/PET electrodes varied within 20% range during 200 bending cycles at a fixed bend radius of 2.2 mm, indicating the increase in their flexibility by a factor of 225 compared with the ITO/PET electrode.

Phenotypic Characterization of Aseel Chicken of Bangladesh

Sarker, Md. Jonaed Alam,Bhuiyan, Mohammad Shamsul Alam,Faruque, Md. Omar,Ali, Md. Ashraf,Lee, Jun-Heon The Korean Society of Poultry Science 2012 韓國家禽學會誌 Vol.39 No.1

The aim of this study was to investigate phenotypic characteristics, morphometric measurements, reproduction and production performances of Aseel chicken of Bangladesh. The dominant feather color of neck/hackles was red in both males (56.14%) and females (54.16%) while the sickle feather color was mostly black in both chickens (71.93% vs. 54.17%). The predominant saddle and breast feather colors were red (40.35%) and black (64.91%), respectively, in male whereas most frequent observed color was pale brown in female (58.33 and 50.0%, respectively). The predominant feather color of wing bow and wing bay was found black (68.42 and 80.70%, respectively) in male but only pale brown color was observed in females (62.5 and 54.17%, respectively) for these two characters. Different phenotypic measurements such as the average shank length and circumference were $12.79{\pm}0.13$ and $7.8{\pm}0.08$ cm, respectively, in male and $10.21{\pm}0.25$ and $5.81{\pm}0.21$ cm, respectively, in female. Keel length was $14.39{\pm}0.19$ cm in male and $10.79{\pm}0.23$ cm in female. The average adult live weight in male was measured $3749.12{\pm}83.44$ g while in female it was $2062.50{\pm}105.26$ g. The age of 1st lay was found to be 28.86 weeks. Total number of eggs laid per year ranged between 24~48, number of clutch/hen/year varied from 2 to 4 and number of eggs/clutch/hen was found to be 10~12. The average live weight of Aseel chicken at 1, 2, 3, 4, 6, 8, 10, 12, 16 and 17 weeks of age were recorded as $31.14{\pm}0.55$, $48.63{\pm}3.99$, $116.57{\pm}5.72$, $138.40{\pm}5.91$, $212.88{\pm}4.82$, $361.00{\pm}9.72$, $577.50{\pm}42.86$, $743.75{\pm}24.65$, $1086.00{\pm}26.02$, $1402.00{\pm}24.54$ and $1432.00{\pm}27.00$ g respectively. Finally, this phenotypic characterization as well as productive and reproductive performances of Aseel chicken will give the baseline information to researcher for further study and for planning any on-ward conservation and implement strategy.

Evaluating Tropical Night by Comparing Trends of Land cover and Land Surface Temperature in Seoul, Korea

Sarker, Tanni,Huh, Jung Rim,Bhang, Kon Joon 한국측량학회 2020 한국측량학회지 Vol.38 No.2

Purification, Characterization, and Biochemical Properties of $\alpha$-Amylase from Potato

Sarker, Goutam Kumar,Hasan, Sohel,Nikkon, Farjana,Mosaddik, Ashik,Sana, Niranjan Kumar,Rahman, Habibur,Park, Sang-Gyu,Lee, Dong-Sun,Cho, So-Mi Kim The Korean Society for Applied Biological Chemistr 2010 Applied Biological Chemistry (Appl Biol Chem) Vol.53 No.1

Purification, characterization and biochemical properties of $\alpha$-amylase from post harvest Bangladeshi Potato (Solanum tuberosum L.) were investigated. The $\alpha$-amylase was purified by successive chromatography on DEAE and CM-cellulose columns with a yield of 24.24%. SDSPAGE showed a molecular weight of 44 kDa for the enzyme that contain 2.8% sugar. The enzyme lost total activity in the presence of the chelating agent EDTA, confirming it was an $\alpha$-type amylase. The enzyme displayed optimum activity at pH 7.2 and $37^{\circ}C$, with an apparent Km value of 0.26% using starch as its substrate. The enzyme was strongly inhibited by $Cu^{2+},\;Fe^{2+}$ and $Zn^{2+}$; moderately by $Li^+,\;Hg^+$ and $Cd^{2+}$; and slightly by $Ag^+,\;K^+,\;Mn^{2+}$ and $Mg^{2+}$. Conversely, $Fe%{3+}$ and $Na^+$ appreciably enhanced activity, while adding calcium ion nearly doubled enzyme activity. In addition, the activity of $\alpha$-amylase gradually decreased with increasing concentrations of urea. Thus, potato $\alpha$-amylase is an attractive target for study to better understand the structure-function relationships of $\alpha$-amylases.

Sub-optimal Antenna Selection in the High SNR MIMO Correlated Downlink Channel

Sarker, Md. Abdul Latif,Lee, Moon Ho,Chinnadurai, Sunil Kluwer Academic Publishers 2018 WIRELESS PERSONAL COMMUNICATIONS Vol. No.

Adsorptive removal of anti-inflammatory drugs from water using graphene oxide/metal-organic framework composites

Sarker, Mithun,Song, Ji Yoon,Jhung, Sung Hwa Elsevier 2018 CHEMICAL ENGINEERING JOURNAL -LAUSANNE- Vol.335 No.-

<P><B>Abstract</B></P> <P>Highly porous metal-organic framework (MOF) composites were synthesized by combining MIL-101(Cr) with graphene oxide (GnO). The porosity of the GnO/MIL-101 composite was increased by composing GnO onto the MOF up to a certain ratio. The GnO/MIL-101 composites were utilized to adsorb anti-inflammatory drugs (AIDs) such as naproxen (NAP) and ketoprofen (KTP) from water. It was observed that GnO/MIL-101 composites displayed highly improved adsorption toward both NAP and KTP relative to pristine MIL-101 and commercial AC. MIL-101_GnO(3%) had a NAP adsorption capacity 2.1 and 1.4 times those of commercial AC and pristine MIL-101, respectively; its adsorption performance was also very competitive with other reported adsorbents. The improved adsorption performance of the composites for NAP was credited to H-bonding because of the presence of several functional groups in the composites. MIL-101_GnO(3%) and NAP act as a H-bond donor and acceptor, respectively. Moreover, MIL-101_GnO(3%) can be regenerated without severe deterioration by simple ethanol washing and can be reused for successive adsorption. Therefore, the GnO/MIL-101 composite is suggested as an efficient adsorbent for the removal of AIDs from water.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Highly porous graphene oxide/MOF composites were prepared in one pot synthesis. </LI> <LI> Adsorptive removal of anti-inflammatory drugs was done with the obtained composites. </LI> <LI> MIL-101_GnO(3%) showed remarkable adsorption capacity for AIDs removal. </LI> <LI> Plausible adsorption mechanism was suggested by adsorption in wide conditions. </LI> <LI> MIL-101_GnO(3%) is proposed as a promising/reusable adsorbent for removing AIDs. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Plasmablastic lymphoma exclusively involving bones mimicking osteosarcoma in an immunocompetent patient : A case report

Sarker, Azmal Kabir,Im, Hyung-Jun,Paeng, Jin Chul,Cheon, Gi Jeong,Kang, Keon Wook,Chung, June-Key,Lee, Dong Soo Williams & Wilkins Co 2016 Medicine Vol.95 No.28

<P><B>Abstract</B></P><P><B>Background:</B></P><P>It has been known that plasmablastic lymphoma (PBL) is a neoplasm of immunocompromised patients occurring in soft tissue of oral cavity or in the vicinity whereas bone is an unlikely site to harbor PBL. However, its occurrence is increasingly being reported in immunocompetent individuals in either osseous or extra-oral sites. To our best knowledge, F-18 FDG PET/CT findings of PBL involving bones in an immunocompetent patient have not been reported, yet .</P><P><B>Case summary:</B></P><P>We report a case of PBL involving multiple bones in an immunocompetent patient. Features of different imaging modalities including F-18 Fluoro-deoxy glucose (FDG) positron emission tomography/computed tomography (PET/CT) were correlated well as findings of osteosarcoma in mandible with metastatic lesions. However, the histopathology and immunohistochemistry (IHC) of bone tissues from 2 separate biopsy sites revealed features of PBL.</P><P><B>Conclusion:</B></P><P>awareness to F-18 FDG PET/CT findings of PBL involving bones in an immunocompetent patient may prevent misdiagnosis.</P>