Exploring the Reasons for Selfie-Taking and Selfie-Posting on Social Media with Its Effect on Psychological and Social Lives:A Study among Indian Youths

‘Selfie’taking was introduced to the common people by smartphones and has become a common practice across the globe in no time.With technological advancement and the popularity of smartphones,selfie-taking has grown rapidly within a short time.In light of the new trend set by the generation,this study aimed to explore reasons for selfie-taking and selfie-posting on social media and their effects on the social and psychological lives of young adults.A purposive sampling method was adopted to select 20 Indian citizens,between 18 and 24 years.The data were collected through semi-structured interviews and analysed using thematic analysis.Selfie-taking and posting on social media give positive feelings,and it acts as a mood modifier dependent mostly on the favourability and feedback about the post which in turn affects emotions and self-satisfaction.

Recombinant vaccines:Current updates and future prospects

Recombinant technology-based vaccines have emerged as a highly effective way to prevent a wide range of illnesses.The technology improved vaccine manufacturing,rendering it more efficient and economical.These vaccines have multiple advantages compared to conventional vaccines.The pandemic has heightened awareness of the advantages of these vaccine technologies;trust and acceptance of these vaccines are steadily growing globally.This work offers an overview of the prospects and advantages associated with recombinant vaccines.Additionally,it discusses some of the challenges likely to arise in the future.Their ability to target diverse pathogen classes underscores their contributions to preventing previously untreatable diseases(especially vector-borne and emerging diseases)and hurdles faced throughout the vaccine development process,especially in enhancing the effectiveness of these vaccines.Moreover,their compatibility with emerging vaccination platforms of the future like virus-like particles and CRISPR/Cas9 for the production of next-generation vaccines may offer many prospects.This review also reviewed the hurdles faced throughout the vaccine development process,especially in enhancing the effectiveness of these vaccines against vector-borne diseases,emerging diseases,and untreatable diseases with high mortality rates like AIDS as well as cancer.

Light a lamp and look at the stock market

In this study,we investigate the impact of the light-a-lamp event that occurred in India during the COVID-19 lockdown.This event happened across the country,and millions of people participated in it.We link this event to the stock market through investor sentiment and misattribution bias.We find a 9%hike in the market return on the postevent day.The effect is heterogeneous in terms of beta,downside risk,volatility,and financial distress.We also find an increase(decrease)in long-term bond yields(price),which together suggests that market participants demanded risky assets in the postevent day.

Estimation of transport coefficients of dense hadronic and quark matter

In this study,we calculated transport coefficients including the shear viscosity and electrical conductivity relative to the density of dense hadronic and quark matter.By considering the simple massless limit for the quark matter and two different effective models for the hadronic matter,we estimated the transport coefficients of the two phases separately.Accordingly,density profiles of the transport coefficients were depicted in two parts:the phasespace part and the relaxation time part.From calculating the shear viscosity to density ratio,we also explored the nearly perfect fluid domain of the quark and hadronic matter.

Power Quality Improvement and Signal Conditioning of PV Array and Grid Interfaced Off-board Charger for Electric Vehicles with V2G and G2V Capabilities

In this work,we present a photovoltaic(PV)-based off-board charging system integrated with the grid using a voltage source converter(VSC).The control of the grid-tied off-board charger is derived from the joint logarithmic hyperbolic cosine robust sparse adaptive filter(JLHCAF)algorithm.This algorithm effectively tracks the fundamental component of the load current in a short duration,providing a good dynamic response.Due to its robustness against impulsive interference,the JLHCAF outperforms other sparsity-aware robust algorithms The cascaded proportional-integral(PI)controller is used to control the bidirectional buck-boost converter for electric vehicle(EV)charging/discharging,which acts in buck operation if the EV is being charged and in boost operation if it is discharged.The reference DC link voltage for the controller is derived by using adaptive MPPT technique.The bidirectional properties of the system enable various functions,including grid-to-vehicle(G2V),vehicle-to-grid(V2G),PV source-to-grid(PV2G),vehicle-to-home(V2H),and PV source-to-vehicle(PV2V)operations.Additionally,the system can supply power to critical nonlinear loads.The control strategy ensures compliance with the power quality requirements set by the IEEE standard,as demonstrated in the results.To validate the effectiveness of the proposed system,we conducted tests under dynamic conditions by disconnecting and reconnecting household loads.Furthermore,the off-board charging system was subjected to actual conditions,such as variations in solar PV insolation,and its steady-state performance was evaluated through simulation and laboratory experimental prototypes.The results,including total harmonic distortion(THD),support the validation of the developed charging system.

Finite size effect on dissociation and diffusion of chiral partners in Nambu-Jona-Lasinio model

The masses of pion and sigma meson modes,along with their dissociation in the quark medium,provide detailed spectral structures of the chiral partners.Collectivity has been observed in pA and pp systems both at LHC and RHIC.In this research,we studied the restoration of chiral symmetry by investigating the finite size effect on the detailed structure of chiral partners in the framework of the Nambu-Jona-Lasinio model.Their diffusion and conduction have been studied using this dissociation mechanism.It is determined that the masses,widths,diffusion coefficients,and conductivities of chiral partners merge at different temperatures in the restoration phase of chiral symmetry.However,merging points are shifted to lower temperatures when finite size effect is introduced into the picture.The strengths of diffusions and conductions are also reduced once the finite size is introduced in the calculations.

Performance comparison of mono and polycrystalline silicon solar photovoltaic modules under tropical wet and dry climatic conditions in east-central India

This work focuses on the performance comparison of monocrystalline and polycrystalline Si solar photovoltaic(SPV)modules under tropical wet and dry climatic conditions in east-central India(21.16°N 81.65°E,Raipur,Chhattisgarh).This study would help to select the SPV module for system installation in the east-central part of the country.For comparative analysis,we used performance ratio(PR)and efficiency as figures of merit.The plane-of-array(POA)irradiance was used to determine the efficiency of the modules.The decomposition and transposition models calculated the POA values from the measured global horizontal irradiance.The data were analysed systematically for 6 months in the non-rainy season,from October 2020 to March 2021.Special attention was given to solar irradiance,ambient temperature and module temperature-the parameters that affect the performance of PV modules.The month of October showed the highest variation in irradiance and temperature.The highest average module temperatures(51-52℃)were observed in October-November,while the lowest average module temperatures(34℃ for mono-Si and 36℃ for poly-Si)were observed in December.The highest value of average monthly POA irradiance(568 W/m^(2))was observed in February and the lowest(483 W/m^(2))in December.The results showed that the monocrystalline SPV module performed better than the polycrystalline module under all weather conditions.The maximum observed values of mono-Si and poly-Si panel PRs were 0.89 and 0.86,respectively,in December.

Well-Defined Fluorinated Copolymers:Current Status and Future Perspectives

Well-defined fluoropolymers exhibit unique properties such as excellent oil and water repellency,satisfactory thermal stability,a low refractive index,and low surface energy.The origin of these properties is attributed to the presence of a strong electronegative and low polarizable fluorine atom in the backbone of such polymers,which leads to a strong C−F bond(with a high bond dissociation energy of 485 kJ mol−1).Because of these features,these polymers have found applications as functional coatings,thermoplastics,biomedical items,separators,and binders for Li ion batteries,fuel cell membranes,piezoelectric devices,high-quality wires and cables,and so forth.Usually,fluoropolymers are synthesized by the conventional radical(co)polymerization of fluoroalkenes,which leads to the production of(co)polymers with an ill-defined end group,uncontrolled molar mass,and high dispersity values.In the last two decades,significant developments of various reversible deactivation radical polymerization(RDRP)techniques have helped the design of macromolecular architectures(including block,graft,star,and dendrimers)on demand.However,for relevant new applications,well-defined fluoropolymers with controlled macromolecular architectures(e.g.,block copolymers as thermoplastic elastomers and electroactive polymers or graft copolymers for fuel cell membranes)are required.Several RDRP methods,developed in the last two decades,have paved the way for the synthesis of(co)polymers with well-defined molar mass,dispersity,chain end-functionality,and macromolecular architectures.Some of these RDRP techniques have been successfully employed for the synthesis of well-defined fluorinated copolymers.These techniques include iodine-transfer polymerization(ITP),reversible addition−fragmentation chain-transfer(RAFT)polymerization,organometallic-mediated radical polymerization(OMRP),and,to a lesser extent,nitroxide-mediated polymerization(NMP).Impressive control of the molar mass parameters of the fluoropolymers synthesized via these techniques also encouraged the researchers to combine these techniques with other postpolymerization strategies,leading to innovative novel polymeric materials.Thus,synthesized well-defined fluoropolymers exhibited a unique combination of properties(such as excellent weather resistance,high thermal/chemical/aging resistance,morphological versatility,and a low dielectric constant/flammability/refractive index).These led to the application of such developed materials in various high-technology applications such as high-performance elastomers,coatings for marine antifouling applications,fluorinated surfactants,fuel cell membranes,and gel polymer electrolytes for Li ion batteries.Newer advances in the field of polymer synthesis techniques are the need of the hour in order to synthesize more advanced fluorinated materials which may change the use of such polymers in engineering and biomedical fields in the current century.However,it should be kept in mind that success in this regard shall heavily depend on a deeper understanding of the polymerization process and structure−activity relationships.