Facebook Role Play Addiction – A Comorbidity with Multiple Compulsive–Impulsive Spectrum Disorders

Problematic Internet use (PIU) is an emerging entity with varied contents. Behavioral addictions have high comorbidity of attention deficit hyperactivity disorder and obsessive–compulsive spectrum disorders. Social networking site (SNS) addiction and role playing game (RPG) addiction are traditionally studied as separate entities. We present a case with excessive Internet use, with a particular focus on phenomenology and psychiatric comorbidities. Case presentation Fifteen-year-old girl with childhood onset attention deficit disorder, obsessive–compulsive disorder, adolescent onset trichotillomania, and disturbed family environment presented with excessive Facebook use. Main online activity was creating profiles in names of mainstream fictional characters and assuming their identity (background, linguistic attributes, etc.). This was a group activity with significant socialization in the virtual world. Craving, salience, withdrawal, mood modification, and conflict were clearly elucidated and significant social and occupational dysfunction was evident. Discussion This case highlights various vulnerability and sociofamilial factors contributing to behavioral addiction. It also highlights the presence of untreated comorbidities in such cases. The difference from contemporary RPGs and uniqueness of role playing on SNS is discussed. SNS role playing as a separate genre of PIU and its potential to reach epidemic proportions are discussed. Conclusions Individuals with temperamental vulnerability are likely to develop behavioral addictions. Identification and management of comorbid conditions are important. The content of PIU continues to evolve and needs further study

Development of sunlight-driven eutectic phase change material nanocomposite for applications in solar water heating

Organic phase change materials (PCMs) have been utilized as latent heat energy storage medium for effective thermal management. In this work, a PCM nanocomposite, consisting of a mixture of two organic PCMs (referred to as eutectic gel PCM) and minimal amount (0.5 wt%) of nanographite (NG) as a supporting material, was prepared. Differential scanning calorimeter was used to determine the melting temperature and latent heat of pristine PCM, paraffin (61.5 °C and 161.5 J/g), eutectic gel PCM (54 °C and 158 J/g) and eutectic gel PCM nanocomposite (53.5 °C and 155 J/g). The prepared PCM nanocomposites exhibited enhanced thermal conductivity and ultrafast thermal charging characteristics. The nanocomposites were employed for two different applications: (i) providing hot water using an indigenously fabricated solar water heating (SWH) system and (ii) solar rechargeable glove that can be rapidly warmed and used. Experimental results on SWH system show that the use of PCM nanocomposites helps to increase the charging rate of PCM while reducing the discharging rate of heat by PCM to water, thus enhancing the maximum utilization of solar energy and hence improving the efficiency of the SWH system. The experimental results on solar rechargeable glove revealed that the glove has the ability to retain the temperature up to 3 hours

Thermal effects on electron-phonon interaction in silicon nanostructures

Raman spectra from silicon nanostructures, recorded using excitation laser power density of 1.0 kW/cm^2, is employed here to reveal the dominance of thermal effects at temperatures higher than the room temperature. Room temperature Raman spectrum shows only phonon confinement and Fano effects. Raman spectra recorded at higher temperatures show increase in FWHM and decrease in asymmetry ratio with respect to its room temperature counterpart. Experimental Raman scattering data are analyzed successfully using theoretical Raman line-shape generated by incorporating the temperature dependence of phonon dispersion relation. Experimental and theoretical temperature dependent Raman spectra are in good agreement. Although quantum confinement and Fano effects persists, heating effects start dominating at higher temperatures than room tempaerature.Comment: 9 Pages, 3 Figures and 1 Tabl

RELATIONSHIP OF CORE STRENGTH AND ISOKINETIC KNEE STRENGTH WITH VERTICAL JUMP PERFORMANCE IN VOLLEYBALL

Background: The game of Volleyball requires the players to perform dynamic movements in receiving the ball and performing explosive movements in spiking and blocking. Vertical jump (VJ) becomes one of the basic motor ability in volleyball owing to its frequent involvement during spiking, blocking, and setting the ball for attack. Although considerable work has been done, the relationship between core strength (Trunk Flexion (TF) & Back Extension (BE)) and vertical jump remains unclear. Thus, the present study was aimed at finding relationship between core strength-endurance and vertical jump performance. Method: 20 male players (Age=18.05±0.76 years; Height=192.75±5.88cm; Weight=77.67±7.37kg) from Indian National U-20 Volleyball team were tested on an Isokinetic Dynamometer at 600*s-1, 900*s-1 and 1200*s-1 angular speeds for strength testing, on DAVID systems for trunk flexion and back extension and on sergeant test for vertical jump. Results: Core strength-endurance (TF & BE) and isokinetic concentric Quadriceps strength at 1200*s-1 (CDQ120) for dominant leg were significantly positively correlated to vertical jump (TF vs VJ: r=0.507, p=0.023; BE vs VJ: r=0.453, p=0.045; CDQ120 vs VJ: r=0.595, p=0.006) while isokinetic strength for non-dominant leg approximated significance with increasing velocities. Also, core strength (TF & BE) was significantly positively related with FlightTime (FT) (TF vs FT: r=0.497, p=0.026; BE vs FT: r=0.568, p=0.009). Conclusion: The significant positive correlation of core strength with vertical jump and FlightTime establishes core strength as an integral component of sports training in Volleyball. Although, eccentric quadriceps strength and hamstring strength were not positively correlated to vertical jump, they help in safe landing mechanism and reduce injury-risks. The small sample size of the study warrants further investigations with larger sample size to confirm the findings.  Article visualizations

On the group theoretic structure of a class of quantum dialogue protocols

Intrinsic symmetry of the existing protocols of quantum dialogue are explored. It is shown that if we have a set of mutually orthogonal $n$-qubit states {\normalsize $\{|\phi_{0}>,|\phi_{1}>,....,|\phi_{i}\}$ and a set of $m-qubit$ ($m\leq n$) unitary operators $\{U_{0},U_{2},...,U_{2^{n}-1}\}:U_{i}|\phi_{0}>=|\phi_{i}>$ and $\{U_{0},U_{2},...,U_{2^{n}-1}\}$ forms a group under multiplication then it would be sufficient to construct a quantum dialogue protocol using this set of quantum states and this group of unitary operators}. The sufficiency condition is used to provide a generalized protocol of quantum dialogue. Further the basic concepts of group theory and quantum mechanics are used here to systematically generate several examples of possible groups of unitary operators that may be used for implementation of quantum dialogue. A large number of examples of quantum states that may be used to implement the generalized quantum dialogue protocol using these groups of unitary operators are also obtained. For example, it is shown that GHZ state, GHZ-like state, W state, 4 and 5 qubit Cluster states, Omega state, Brown state, $Q_{4}$ state and $Q_{5}$ state can be used for implementation of quantum dialogue protocol. The security and efficiency of the proposed protocol is appropriately analyzed. It is also shown that if a group of unitary operators and a set of mutually orthogonal states are found to be suitable for quantum dialogue then they can be used to provide solutions of socialist millionaire problem.Comment: 15 page

DOCKING STUDY OF MARKETED ANTIMALARIALS ON PLASMODIUM FALCIPARUM DIHYDROFOLATE REDUCTASE (Pf DHFR)

Malaria is one of the most pivotal parasitic diseases in humans and the malarial parasite transmission in above 100 countries of a population of five million people. In this study, we selected marketed antimalarial drugs hydroxychloroquine, artemisinin and primaquine and performed docking study using Auto Dock on Plasmodium falciparum dihydrofolate reductase (PfDHFR). Docking study suggested about the binding of the drugs at the active site. Docking study also demonstrated about the potency of the drug and their binding affinity with the target. Different binding modes of marketed drugs were observed with different amino acid interactions with different features like hydrophobic, hydrogen bonding, and van der Waals interactions. The least binding energy interaction structures were selected to observe the dock pose of drugs at the active site of PfDHFR