Enhancement of photoresponse and photovoltaic properties in KBiFe2O5/BiFeO3 bilayer thin films

Subudhi Subhasri,Subramanyam B.V.R.S.,Alam Injamul,Mandal Manoranjan,Patra Santosini,Nayak Alok Kumar,Mahanandia Pitamber 한국물리학회 2024 Current Applied Physics Vol.64 No.-

In this report, the performance of a new photovoltaic device configuration in which bilayer KBiFe2O5 (KBFO)/BiFeO3 (BFO) as absorber materials have been investigated and compared with the single active layer-based devices of BFO and KBFO. The obtained short-circuit current density of 58.81 μAcm−2, open-circuit voltage of 0.65 V, and power conversion efficiency of 0.014 % for the complete photovoltaic device glass/FTO/KBFO/BFO/Ag are comparatively higher than that of glass/FTO/BFO/Ag and glass/FTO/KBFO/Ag devices. It has been observed that the active bilayer KBFO/BFO shows switchable photoresponse with respect to positive and negative polarities. This work may offer the procedures for further optimizing the photo absorber layer, thereby improving the performances of multiferroic-based devices for ferroelectric photovoltaic applications.

Design of Face Recognition based Embedded Home Security System

( Mrutyunjanya Sahani ),( Subhashree Subudhi ),( Mihir Narayan Mohanty ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.4

Home security has become the prime concern for everyone in present scenario. In this work an attempt has been made to develop a home security system which is accessible, affordable and yet effective.The proposed system is based on `Remote Embedded Control System` (RECS) which works both on the web and gsm platform for authentication and monitoring. This system is therefore cost effective as it relies on existing network infrastructure. As PCA is most popular and efficient algorithm for face recognition, it has been usedin this work. Next to it an interface has been developed for communication purpose in the embedded security system through the ZigBee module. Based on this embedded system, automated control of door movement has been implemented through electromagnetic door lock technology. This helps the users to monitor the real-time activities through web services/SMS. The web service consists of either web browser command or e-mail provision. The system establishes the communication between the system and authenticated user. The e-mail received by the system from the authorized person will monitor and control the real-time operation and door lock. The entire control system is reinforced using ARM1176JZF-S microcontroller and tested for actual use in the home environment. The result shows the experimental verification of the proposed system.

The Role of Ribose on Oxidative Stress During Hypoxic Exercise: A Pilot Study

Seifert, John G.,Subudhi, Andrew W.,Fu, Min-Xin,Riska, Karen L.,John, Jeff C.,Shecterle, Linda M.,Cyr, John A. St. The Korean Society of Food Science and Nutrition 2009 Journal of medicinal food Vol.12 No.3

Oxygen free radicals are produced during stress, are unstable, and potentially interact with other cellular components or molecules. This reactivity can influence cellular function, including a prolongation in tissue recovery following exercise. We tested the effect of ribose (d-ribose), a pentose carbohydrate, in a double-blinded, crossover study on markers of free radical production during hypoxic exercise. Seven healthy volunteers cycled at their lactate threshold for 25 minutes while inhaling 16% $O_2$ with a subsequent 60-minute resting period at room air. Subjects ingested either placebo or 7 g of ribose in 250mL of water before and after the exercise session. Urinary malondialdehyde (MDA) and plasma reduced glutathione levels increased significantly during placebo ingestion ($0.2\;{\pm}\;0.03\;{\mu}M/mg$ and $0.26\;{\pm}\;0.29\;{\mu}M$, respectively) but were lower with ribose supplementation ($0.04\;{\pm}\;0.03\;{\mu}M/mg$ and $0.38\;{\pm}\;0.29\;{\mu}M$, respectively; P < .05). Uric acid levels were similar between groups (ribose vs. placebo, $4.55\;{\pm}\;0.06\;mg/dL$ vs. $4.67\;{\pm}\;0.06\;mg/dL$). Ribose demonstrated a beneficial trend in lower MDA and reduced glutathione levels during hypoxic stress.

High Frequency Shoot Proliferation from Cotyledonary Node of Lawsonia inermis L. and Validation of their Molecular Finger Printing

Arpita Moharana,Aradhana Das,Enketeswara Subudhi,Soumendra K. Naik,Durga P. Barik 한국작물학회 2017 Journal of crop science and biotechnology Vol.20 No.5

An efficient and reproducible protocol for in vitro plant regeneration was developed for Lawsonia inermis L. using cotyledonary node explant derived from axenic seedlings. Highest shoot proliferation frequency (ca 96.6%) was achieved on Murashige and Skoog’s, 1962 (MS) basal medium supplemented with 8.88 μM 6-Benzyladenine (BA) + 2.68 μM Napthalene acetic acid (NAA). Up-scaling of shoots was carried out using in vitro nodes on MS medium supplemented with 4.44 μM BA. So overall, an average of 238 shoots was produced at 75 days. Of the four different forms of cotyledonary node explants evaluated, highest shoot multiplication was observed in cotyledonary node explant with two whole cotyledons. In vitro regenerated shoots were best rooted (ca 34.3 roots / shoot) on ½ MS medium devoid of any growth regulator. The plantlets were successfully acclimated in sand:soil :: 1:1and established in the garden soil. Random amplified polymorphic DNA (RAPD) and inter-simple sequence repeat (ISSR) analysis revealed a homogeneous amplification profile for all micropropagated plants validating the genetic fidelity of the in vitro-regenerated plants and supporting the regeneration protocol for economic commercial exploitation.

Investigation of Thermal Conductivity and Viscosity of Al2O3/Water Nanofluids Using Full Factorial Design and Utility Concept

Deepak Khurana,Rajesh Choudhary,Sudhakar Subudhi 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2016 NANO Vol.11 No.8

In the present study, the effect of particle concentration, particle diameter and temperature on the thermal conductivity and viscosity of Al2O3/water nanofluids was investigated experimentally using design of experiment approach (full factorial design). Variables were selected at two levels each: particle concentration (0.1–1%), particle diameter (20–40 nm) and temperature (10– 40℃). It was observed that the thermal conductivity of the Al2O3/water nanofluids increases with increasing concentration and temperature and decreases with increase in particle diameter, while viscosity increases with increasing particle diameter. Results showed that the interaction effect of concentration and temperature also has significant effect on the thermal conductivity of Al2O3/water nanofluids. For viscosity, the interaction of particle diameter and temperature was important. Utility concept was used to optimize the properties collectively for better heat transfer performance. The optimal combination for high thermal conductivity and low viscosity was obtained at higher level of particle concentration (1%), lower level of particle diameter (20 nm) and higher level of temperature (40℃). At this condition the increment in thermal conductivity and viscosity compared to base fluid was 11.51% and 6.37%, respectively.

The Role of Ribose on Oxidative Stress During Hypoxic Exercise: A Pilot Study

John G. Seifert,Andrew W. Subudhi,Min-Xin Fu,Karen L. Riska,Jeff C. John,Linda M. Shecterle,John A. St. Cyr 한국식품영양과학회 2009 Journal of medicinal food Vol.12 No.3

Oxygen free radicals are produced during stress, are unstable, and potentially interact with other cellular components or molecules. This reactivity can influence cellular function, including a prolongation in tissue recovery following exercise. We tested the effect of ribose (d-ribose), a pentose carbohydrate, in a double-blinded, crossover study on markers of free radical production during hypoxic exercise. Seven healthy volunteers cycled at their lactate threshold for 25 minutes while inhaling 16% O2 with a subsequent 60-minute resting period at room air. Subjects ingested either placebo or 7g of ribose in 250mL of water before and after the exercise session. Urinary malondialdehyde (MDA) and plasma reduced glutathione levels increased significantly during placebo ingestion (0.2±0.03nM/mg and 0.26±0.29μM, respectively) but were lower with ribose supplementation (0.04±0.03nM/mg and 0.38±0.29μM, respectively; P<.05). Uric acid levels were similar between groups (ribose vs. placebo, 4.55±0.06mg/dL vs. 4.67±0.06mg/dL). Ribose demonstrated a beneficial trend in lower MDA and reduced glutathione levels during hypoxic stress.

AI-driven drowned-detection system for rapid coastal rescue operations

Dileep P,M. Durairaj,Sharmila Subudhi,V V R Maheswara Rao,J. Jayanthi,D Suganthi 대한공간정보학회 2024 Spatial Information Research Vol.32 No.2

Recent observations indicate that nearly 50% of the public frequently visit coastal areas during weekends, seeking the health benefits of natural sunlight and fostering familial bonds. Notably, a significant portion of these visitors are unaware of swimming techniques or face other physical challenges, rendering them vulnerable to drowning, especially in areas lacking adequate lifeguard support or immediate medical emergency services. This study introduces an advanced drowneddetection device that employs a deep learning algorithm, grounded in artificial intelligence architecture, to swiftly detect and address potential drowning incidents. The system is particularly vigilant towards high-risk groups, such as children and the elderly. Upon detecting a threat, it autonomously deploys drones equipped with inflatable rescue tubes and notifies local authorities. Preliminary results suggest that our proposed model can effectively rescue a drowning individual in under 7 min, highlighting its prospective utility in curtailing swimming-related fatalities worldwide. This research underscores the need for technological intervention to enhance safety measures at coastal destinations and seeks to raise awareness about the importance of well-established lifeguard support.

Bioelectrochemical enhancement of direct interspecies electron transfer in upflow anaerobic reactor with effluent recirculation for acidic distillery wastewater

Feng, Qing,Song, Young-Chae,Yoo, Kyuseon,Kuppanan, Nanthakumar,Subudhi, Sanjukta,Lal, Banwari Elsevier 2017 Bioresource technology Vol.241 No.-

<P><B>Abstract</B></P> <P>Methane production in the upflow anaerobic bioelectrochemical reactor (UABE) treating acidic distillery wastewater was compared to the upflow anaerobic sludge blanket reactor (UASB), and the electron transfer pathways for methane production were also evaluated in the effluent recirculation. The methane productions from reactors were influenced by the low pH of influent wastewater. However, the methane production rate and yield of the UABE were 2.08L/L.d and 320mL/g COD<SUB>r</SUB>, which were higher than the UASB. The effluent recirculation containing alkalinity neutralized the acidic influent and increased the upflow velocity in both reactors, and improved the direct interspecies electron transfer more in the UABE. When the effluent recirculation ratio was 3.0 in the UABE, the methane production rate and yield were reached up to 3.88L/L.d and 501.0mL/g COD<SUB>r</SUB>, respectively. The UABE requires electrode installation and electrical energy for operation, but the benefits from increased methane production are much higher.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Electroactive bacteria enriched in UABE activate bDIET for methane production. </LI> <LI> bDIET for methane production is less susceptible to low influent pH. </LI> <LI> Effluent recirculation in UABE further improves bDIET for methane production. </LI> <LI> UABE with effluent recirculation is a recommended process for distillery wastewater. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Neuroprotective effect of ibuprofen by intranasal application of mucoadhesive nanoemulsion in MPTP induced Parkinson model

Surjyanarayan Mandal,Snigdha Das Mandal,Krishna Chuttani,Krutika K. Sawant,Bharat Bhushan Subudhi 한국약제학회 2016 Journal of Pharmaceutical Investigation Vol.46 No.1

This study was to investigate the neuroprotective effect of Ibuprofen by intranasal route against inflammationmediated by dopaminergic neurodegeneration in 1-methyl- 4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) mice model of Parkinson’s disease (PD). Ibuprofen loaded sodium hyaluronate based mucoadhesive nanoemulsion (MNEI) was developed by using response surface methodology (RSM) and was characterized. Male C57BL/6 mice were first treated with four intraperitoneal injections of MPTP (20 mg/kg of body weight) at 2 h intervals followed by Ibuprofen for 2 consecutive weeks at 2.86 mg/kg of body weight per day. Optimal MNEI containing 3 % Labrafil M 1944 CS as oil phase, 36 %of Accenon CC and Transcutol P at 3:1 ratio and 0.5 % sodium hyaluronate was stable, non-ciliotoxic with 46.3 ± 2.28 nm as average globule size PdI value and TEM result showed the narrow size distribution of MNEI. The result showed that all three independent variables had a significant effect (p\0.05) on the responses. In-vivo results revealed significant reduction of MPTP-mediated dopamine depletion after nasal administration of Ibuprofen through MNEI. MPTP intoxication significantly decreased striatal DA content to 29.92 % which was elevated to 58.21 % after Ibuprofen treatment using MNEI. Significant improvement in motor performance and gross behavioural activity of the mice was observed through the findings of rota-rod and open field test findings. Findings of the investigation revealed that Ibuprofen through developed MNEI was shown to protect neurons against MPTP-induced injury in the striatum and could be a promising approach to treat PD.

Genetic Variability of Quality Characters and Grain Yield in Lowland Rice Genotypes of Eastern India

Lotan Kumar Bose,Sanjukta Das,Sarat Kumar Pradhan,HataNath Subudhi,Sanjay Singh,OnkarNath Singh 한국육종학회 2007 한국육종학회지 Vol.39 No.1

Twenty-five promising lowland rice genotypes of eastern India were studied for genetic variability in twelve quality characters and grain yield. Analysis of variance for all the characters indicated significant differences among genotypes for all the phys