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Riemannian data preprocessing in machine learning to focus on QCD color structure
Hammad Ahmed,Park Myeonghun 한국물리학회 2023 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.83 No.4
Identifying the quantum chromodynamics (QCD) color structure of processes provides additional information to enhance the reach for new physics searches at the large Hadron collider (LHC). Analyses of QCD color structure in the decay process of a boosted particle have been spotted as information becomes well localized in the limited phase space. While these kinds of a boosted jet analyses provide an efcient way to identify the color structure, the constrained phase space reduces the number of available data, resulting in a low signifcance. In this letter, we provide a simple but a novel data preprocessing method using a Riemann sphere to utilize a full phase space by decorrelating QCD structure from kinematics. We can achieve statistical stability by enlarging the size of testable data set with focusing on QCD structure efectively. We demonstrate the power of our method with the fnite statistics of the LHC Run 2. Our method is complementary to conventional boosted jet analyses in utilizing QCD information over a wide range of a phase space.
Hammad Anuoluwapo Abass,Akindele Adebayo Mebawondu,Ojen Kumar Narain,Jong Kyu Kim 경남대학교 수학교육과 2021 Nonlinear Functional Analysis and Applications Vol.26 No.3
In this paper, we investigate a hybrid algorithm for finding zeros of the sum of maximal monotone operators and Lipschitz continuous monotone operators which is also a common fixed point problem for finite family of relatively quasi-nonexpansive mappings and split feasibility problem in uniformly convex real Banach spaces which are also uniformly smooth. The iterative algorithm employed in this paper is design in such a way that it does not require prior knowledge of operator norm. We prove a strong convergence result for approximating the solutions of the aforementioned problems and give applications of our main result to minimization problem and convexly constrained linear inverse problem.
Hammad HHM,Meihu Ma,Guofeng Jin,Yongguo Jin,Ibrahim Khalifa,Qi Zeng,Yuanyuan Liu 한국축산식품학회 2019 한국축산식품학회지 Vol.39 No.5
This study mainly investigated the improvement effect of nitroso-hemoglobin (NO-Hb) and four lactic acid bacteria (LAB) (Streptococcus thermophiles, Lactobacillus bulgaricus, Lactobacillus casei, and Montessori enterococcus) on the color and microbiological qualities of raw beef. Three strains of Escherichia coli, Staphylococcus, Salmonella, and Pseudomonas were used as pathogenic bacteria. The results showed that both NO-Hb and LAB could enhance the color stability and scavenged the spoilage bacteria in a minced beef model. But the improvement effect of NO-Hb was more significant than LAB. This suggested that NO-Hb, as a novel ingredient, could be used as a promising substitute for nitrite in meat products to improve the color and safety of meat products. In addition, low field (LF)-NMR method has been established to be practicable to identify changes in the relaxation times of water and fat caused by different type of bacteria and the storage periods. The number of relaxation components in minced beef was affected by bacteria and increase of the storage period.
Services and Security Threats in SDN Based VANETs: A Survey
Shafiq, Hammad,Rehman, Rana Asif,Kim, Byung-Seo Hindawi Limited 2018 WIRELESS COMMUNICATIONS AND MOBILE COMPUTING Vol.2018 No.-
<P>As the number of vehicles is increasing, the number of road side accidents is also increasing rapidly. The majority of these accidents is caused by the negligence of the driver. For intelligent transportation services, new protocols and architecture are continuously being developed by researchers around the globe. Thus to ensure the safety of drivers many countries are now adopting and investing a lot on vehicular ad hoc network (VANET). On the other perspective, there are many issues related to this field that must be resolved before VANET technology is practically adopted. In the case of no or low-security, several attacks can occur that may affect the efficiency and the reliability of the system. To make VANET systems more efficient software defined networking (SDN) technology is introduced in it. This technique was shortly named as SDN-based VANET. SDN-based VANET system helps us to get rid of the restriction and the challenges that are present in the simple VANET systems. It helps us to decrease the overall load on the network by managing the overall network through a single remote controller. In this survey paper, we will elaborate the concept of SDN-based VANET, its working, applications, services, security threats, and benefits over the previous techniques.</P>
Interfacial bond behavior of FRP fabrics bonded to fiber-reinforced geopolymer mortar
Khalid, Hammad R.,Ha, S.K.,Park, S.M.,Kim, G.M.,Lee, H.K. Elsevier 2015 COMPOSITE STRUCTURES -BARKING THEN OXFORD- Vol.134 No.-
<P><B>Abstract</B></P> <P>This paper presents the experimental investigation of composite-mortar three-point bending beam test setup, used to characterize the bond behavior between concrete/mortar and fiber-reinforced polymers (FRPs). With this aim, a series of experimental studies have been conducted by considering different FRP fabric types (carbon/glass and carbon/aramid), epoxy adhesives (E-1 and E-2), and notch depths (50 and 33mm). In addition, a fiber-reinforced mortar, with different fiber contents (0, 0.5, 1 and 1.5wt.%) was also used to investigate the effects of short fibers on the interface behavior. From the load–displacement curves in three-point bending beam tests, peak load (<I>P<SUB>peak</SUB> </I>), ultimate mid-span deflection (<I>δ<SUB>ult</SUB> </I>), and interfacial fracture energy (<I>G<SUB>F</SUB> </I> <SUB>,</SUB> <I> <SUB>int</SUB> </I>) of different bonded interfaces were evaluated. It is concluded from this study that this test setup is useful for the comparison of different bonded interfaces as true interfacial failure was observed, but the interfacial fracture energy (<I>G<SUB>F</SUB> </I> <SUB>,</SUB> <I> <SUB>int</SUB> </I>) obtained from these tests showed sensitivity to the notch depth. The incorporation of short steel fibers into mortar was not effective to improve the interfacial bond strength as not much fiber action was observed (near the bond line) during testing.</P>