WOVEN g-FRAMES IN HILBERT C^∗-MODULES

Rajput, Ekta,Sahu, Nabin Kumar,Mishra, Vishnu Narayan The Kangwon-Kyungki Mathematical Society 2021 한국수학논문집 Vol.29 No.1

Woven frames are motivated from distributed signal processing with potential applications in wireless sensor networks. g-frames provide more choices on analyzing functions from the frame expansion coefficients. The objective of this paper is to introduce woven g-frames in Hilbert C∗-modules, and to develop its fundamental properties. In this investigation, we establish sufficient conditions under which two g-frames possess the weaving properties. We also investigate the sufficient conditions under which a family of g-frames possess weaving properties.

A Solution towards Eliminating Transaction Malleability in Bitcoin

Rajput, Ubaidullah,Abbas, Fizza,Oh, Heekuck Korea Information Processing Society 2018 Journal of information processing systems Vol.14 No.4

Bitcoin is a decentralized crypto-currency, which is based on the peer-to-peer network, and was introduced by Satoshi Nakamoto in 2008. Bitcoin transactions are written by using a scripting language. The hash value of a transaction's script is used to identify the transaction over the network. In February 2014, a Bitcoin exchange company, Mt. Gox, claimed that they had lost hundreds of millions US dollars worth of Bitcoins in an attack known as transaction malleability. Although known about since 2011, this was the first known attack that resulted in a company loosing multi-millions of US dollars in Bitcoins. Our reason for writing this paper is to understand Bitcoin transaction malleability and to propose an efficient solution. Our solution is a softfork (i.e., it can be gradually implemented). Towards the end of the paper we present a detailed analysis of our scheme with respect to various transaction malleability-based attack scenarios to show that our simple solution can prevent future incidents involving transaction malleability from occurring. We compare our scheme with existing approaches and present an analysis regarding the computational cost and storage requirements of our proposed solution, which shows the feasibility of our proposed scheme.

Deuterium ion irradiation impact on the current-carrying capacity of DI-BSCCO superconducting tape

Rajput M.,Swami H.L.,Kumar R.,Bano A.,Vala S.,Abhangi M.,Prasad Upendra,Kumar Rajesh,Srinivasan R. 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.7

In the present work, we have irradiated the DI-BSCCO superconducting tapes with the 100 keV deuterium ions to investigate the effect of ion irradiation on their critical current (Ic). The damage simulations are carried out using the binary collision approximation method to get the spatial distribution and depth profile of the damage events in the high temperature superconducting (HTS) tape. The point defects are formed near the surface of the HTS tape. These point defects change the vortex profile in the superconducting tape. Due to the long-range interaction of vortices with each other, the Ic of the tape degrades at the 77 K and self magnetic field. The radiation dose of 2.90 MGy degrades the 44% critical current of the tape. The results of the displacement per atom (dpa) and dose deposited by the deuterium ions are used to fit an empirical relation for predicting the degradation of the Ic of the tape. We include the dpa, dose and columnar defect terms produced by the incident particles in the empirical relation. The fitted empirical relation predicts that light ion irradiation degrades the Ic in the DI-BSCCO tape at the self field. This empirical relation can also be used in neutron irradiation to predict the lifetime of the DI-BSCCO tape. The change in the Ic of the DI-BSCCO tape due to deuterium irradiation is compared with the other second-generation HTS tape irradiated with energetic radiation

Use of an insulated tip knife in the management of a common foreign body in a child

Sanjay Rajput,Pratin Bhatt,Vatsal Bachkaniwala,Chaiti Gandhi,Rushi Pipavat,Varun Tadkalkar,Ravi Bokarvadia 소화기인터벤션의학회 2022 Gastrointestinal Intervention Vol.11 No.2

A 2-year-old child presented with button battery (BB) ingestion that had taken place 5 months previously. The BB was impacted within the post-cricoid esophageal wall without an obvious perforation or communication with the trachea. In view of the high surgical risk, we attempted to remove the BB endoscopically. BB removal was not possible with conventional devices due to the post-cricoid location and the invagination of the BB into the esophageal wall. We dissected the BB from the surrounding esophageal wall using an insulated tip (IT) knife and successfully extracted the BB. The use of an IT knife prevented inadvertent injury or perforation while dissecting the BB, and surgery was avoided.

Relationship between biliary tract cancer and coffee consumption in urban population

Sumit RAJPUT,P ASHOK 한국간담췌외과학회 2022 Annals of hepato-biliary-pancreatic surgery Vol.26 No.-

The Effects of Asparagus Racemosu on Oxidative Stress, Constipation and Hepatic Function in Type 2 Diabetic Patient

( Sumit Rajput ),( P Ashok ),( A Joshi ) 대한간학회 2020 춘·추계 학술대회 (KASL) Vol.2020 No.1

Aims: Diabetes mellitus is the most common endocrine disorder, causes many complications such as micro- and macro-vascular diseases. Asparagus racemosus is a widely found medicinal plant in tropical and subtropical parts of India. Our objective was to investigate effects of Asparagus racemosu root extract (ARRE) on constipation, liver dysfunctions and defence of red blood cells in type 2 diabetic patients. Methods: A total number of 100 subjects were selected with the age ranging from 45 to 60 years. Among them, 50 diagnosed type 2 diabetes individuals were included in the Group A and 50 apparently healthy individuals were selected as Group B for comparison. ARRE was prepared in hot water and orally administered to type 2 diabetic patients with constipation. This treatment was thrice a week in 1^st month, twice in a week in corresponding 2^nd and 3^rd months and once in a week from 4^th to 6^th months. The defensive enzyme, glutathione peroxidase, superoxide dismutase, catalase and fasting blood sugar, hemoglobin A1c, apolipoprotein B, apolipoprotein A-I, and malondialdehyde were measured in the red blood cells. The liver function test was performed by measuring hepatic enzymes (Aspartate amino transferase, alanine amino transferase) and lipid profile levels. Results: ARRE supplementation significantly reduced the levels of fasting blood sugar, serum hepatic enzymes, hemoglobin A1c, apolipoprotein B, apolipoprotein B/apolipoprotein A-I and malondialdehyde in ARRE group in comparison to baseline, as well as control group, while it increased the level of apolipoprotein A-I (P<0.05). The diabetic patients were found to be altered lipid profile with vulnerable to skin infection particularly in the pelvic regions, backside, legs, etc. which were reversed to normal after six months of ARRE treatments. The stools quality also changed to normal. The antioxidant enzymes decreased in red blood cells of diabetics by 20-30%, normalized after six months of treatment with ARRE extract. There was also normalize hepatic enzymes activity with ARRE treatment to diabetic patients. Conclusions: ARRE treatment to diabetic patients not only normalize the defense of red blood cells but also corrects skin infection, liver disorder, neurological disorder and physiological disorder. The findings evidently suggest the hepatoprotective properties of ARRE in diabetic patients.

Bio-inspired gold nanoparticles synthesis and their anti-biofilm efficacy

Narendrasingh Rajput,Ashok Bankar 한국약제학회 2017 Journal of Pharmaceutical Investigation Vol.47 No.6

Gold nanoparticles (AuNPs) are ‘smart nanomaterials’ with a variety of applications in the different fields. The conventional methods used for AuNPs have some drawbacks and therefore, search of an alternative ‘green method’ is of high importance. In this study, Acinetobacter baumannii AB01 isolated from an infected apple sample was used as a green route for AuNPs synthesis. Effect of various physicochemical parameters such as pH, temperature, cell density and gold chloride salt concentrations on AuNPs synthesis was studied. These AuNPs were further characterized by UV–Vis spectrophotometer, transmission electron microscopy (TEM), energy dispersive spectroscopy, X-ray diffraction and dynamic light scattering. TEM images study showed presence of an extracellular polymeric substance around cells of A. baumannii AB01. The synthesized biogenic AuNPs were tested for their antibacterial activity by well diffusion method. Anti-biofilm efficacy of AuNPs was tested on the glass slide surfaces against the biofilms of Pseudomonas aeruginosa, Vibrio cholera and Brevibacterium linens and visualised by using a fluorescence microscopy. Biofilm formation was reduced about 60–80 % when compared with control biofilm (without AuNPs). Effect of different AuNPs concentrations on biofilm formation in microtiter plates was studied by 96-well plate assay. The bacterial biofilm inhibition (%) was increased with increasing concentrations of AuNPs.

Use of an insulated tip knife in the management of a common foreign body in a child

Sanjay Rajput,Pratin Bhatt,Vatsal Bachkaniwala,Chaiti Gandhi,Rushi Pipavat,Varun Tadkalkar,Ravi Bokarvadia 소화기인터벤션의학회 2022 International journal of gastrointestinal interven Vol.11 No.2

A 2-year-old child presented with button battery (BB) ingestion that had taken place 5 months previously. The BB was impacted within the post-cricoid esophageal wall without an obvious perforation or communication with the trachea. In view of the high surgical risk, we attempted to remove the BB endoscopically. BB removal was not possible with conventional devices due to the post-cricoid location and the invagination of the BB into the esophageal wall. We dissected the BB from the surrounding esophageal wall using an insulated tip (IT) knife and successfully extracted the BB. The use of an IT knife prevented inadvertent injury or perforation while dissecting the BB, and surgery was avoided.

Controlled $K$-frames in Hilbert C*-modules

Ekta Rajput,Nabin Kumar Sahu,Vishnu Narayan Mishra 강원경기수학회 2022 한국수학논문집 Vol.30 No.1

Controlled frames have been the subject of interest because of their ability to improve the numerical efficiency of iterative algorithms for inverting the frame operator. In this paper, we introduce the notion of controlled $K$-frame or controlled operator frame in Hilbert $C^{*}$-modules. We establish the equivalent condition for controlled $K$-frame. We investigate some operator theoretic characterizations of controlled $K$-frames and controlled Bessel sequences. Moreover, we establish the relationship between the $K$-frames and controlled $K$-frames. We also investigate the invariance of a controlled $K$-frame under a suitable map $T$. At the end, we prove a perturbation result for controlled $K$-frame.

Silibinin Radiosensitizes EGF Receptor-knockdown Prostate Cancer Cells by Attenuating DNA Repair Pathways

Mohit Rajput,Deepali Mishra,Kunal Kumar,Rana P. Singh 대한암예방학회 2022 Journal of cancer prevention Vol.27 No.3

Emergence of radioresistance in prostate cancer (PCa) cells is a major obstacle in cancer therapy and contributes to the relapse of the disease. EGF receptor (EGFR) signaling plays an important role in the development of radioresistance. Herein, we have assessed the modulatory effects of silibinin on radiation-induced resistance via DNA repair pathways in EGFR-knockdown DU145 cells. shRNA-based silencing of EGFR was done in radioresistant human PCa DU145 cells and effects of ionizing radiation (IR) and silibinin were assessed using clonogenic and trypan blue assays. Furthermore, radiosensitizing effects of silibinin on PCa in context with EGFR were analyzed using flow cytometry, comet assay, and immunoblotting. Silibinin decreased the colony formation ability with an increased death of DU145 cells exposed to IR (5 Gray), with a concomitant decrease in Rad51 protein expression. Silibinin (25 μM) augmented the IR-induced cytotoxic effect in EGFR-knockdown PCa cells, along with induction of G2/M phase cell cycle arrest. Further, we studied homologous recombination (HR) and non-homologous end joining (NHEJ) pathways in silibinin-induced DNA double-strand breaks in EGFR-knockdown DU145 cells. Silibinin down-regulated the expression of Rad51 and DNA-dependent protein kinase proteins without any considerable effect on Ku70 and Ku80 in IR-exposed EGFR-knockdown PCa cells. The pro-survival signaling proteins, phospho-extracellular signal-regulated kinases (ERK)1/2, phospho-Akt and phospho-STAT3 were decreased by silibinin in EGFR-deficient PCa cells. These findings suggest a novel mechanism of silibinin-induced radiosensitization of PCa cells by targeting DNA repair pathways, HR and NHEJ, and suppressing the pro-survival signaling pathways, ERK1/2, Akt and STAT3, in EGFR-knockdown PCa cells.