On colouring point visibility graphs

In this paper we show that it can be decided in polynomial time whether or not the visibility graph of a given point set is 4-colourable, and such a 4-colouring, if it exists, can also be constructed in polynomial time. We show that the problem of deciding whether the visibility graph of a point set is 5-colourable, is NP-complete. We give an example of a point visibility graph that has chromatic number 6 while its clique number is only 4

Effect of seasonal and environmental variation on yield and yield components of hybrid Maize

The experiment was conducted during kharif II in 2006 & 07, rabi in 2006-07 & 07-08 and kharif I in 2007 and 2008 at ARS, Burirhat, Rangpur in RCB design to understand the influence of season and location specific environment effect on growth and yield of hybrid maize and selected suitable variety(s). Four hybrid maize varieties V1=BARI hybrid Maize (BHM)-2, V2=BHM-3, V3= BHM-5 and V4= Pacific-984 (as check) were tested during kharif II in 2006 while seven varieties V1= BHM-2, V2= BHM-3, V3= BHM-5 and V4= Pacific-984, V5= Pacific-60, V6= Pacific-11 and V7= Prolin were during the other seasons except rabi, 07- 08, where variety Pacific-555 was used in V7 instead of Prolin. Seeds were sown on August 30 and August 11 for kharif II of 2006 and 2007, respectively, November 28 and 17 for rabi 2006-2007 and 2007-08 and March 08 and 12 for for kharif I 2007 and 2008. The crops were harvested on January 25, 2007 and January 12, 2008 in the two consecutive kharif II seasons; May 10 and April 29 in rabi 2006-07 and 2007-08, and July 01 and 05 in kharif I 2007 and 2008, respectively. Yield parameters were mostly varied significantly. The highest yield was obtained from BHM-5 (9.03 t ha-1), which was followed by Pacific-984 (8.89 t ha-1), BHM-3 (8.81 t ha-1) and BHM-2 (8.58 t ha-1) in kharif II, 2006 while in kharif II, 2007 the highest significant yield was noted in Pacific-984 (9.22 t ha-1). In rabi, 2006-07, significant highest grain yield was obtained from Pacific-60 (11.03 t ha-1), which was statistically identical with Prolin (10.20 t ha-1). The yield of Prolin was also statistically identical with Pacific-11 (10.01 t ha-1), BHM-5 (10.00 t ha-1), BHM-3 (9.92 t ha-1) and BHM-2 (9.51 t ha-1). Comparatively lower temperature during ear initiation (mean 29.6°C in rabi and 31°C in kharif II) and silking (mean 18.2°C in rabi and 20.2°C in kharif II) contributed much for higher trend of yield in rabi over kharif. In kharif I, 2007, the highest yield (9.55 t ha-1) was recorded from Pacific-60, which was identical to Pacific-984 (9.25 t ha-1), BHM-5 (9.11 t ha-1) and BHM-3 (8.89 t ha-1). All the BARI hybrid maize varieties were suitable to grown in kharif I, kharif II and rabi season although BHM-3, BHM-5, Pacific-60 and Pacific-984 were better in Kharif I and Pacific-60, BHM-5, Prolin and Pacific-555 were found better in Rabi season. DOI: http://dx.doi.org/10.3329/ijarit.v4i2.22635 Int. J. Agril. Res. Innov. & Tech. 4 (2): 1-5, December, 201

Improvement of potato based cropping patterns by inclusion of short duration Mungbean and T. Aman rice in Monga prone areas of Rangpur

The experiment was carried out to compare the improved cropping patterns against the farmers existing potato based cropping patterns having no mungbean/brown manure crop for higher yield, economic return and income generation in agricultural field in the off period following RCBD design with three replications at farmers field at Paikan Gangachara, Rangpur district during September- October. The treatments (cropping patterns) were T1 = T. aman rice (BINA 7) - Potato - Mungbean (BARI mungbean 6) (Improved pattern), T2 = T. aman rice (BR11) - Potato - Fallow (Farmers pattern), T3 = T. aman rice (BINA 7) - Potato + Maize intercrop - Mungbean (Improved pattern) and T4 = T. aman rice (BR11) - Potato / Maize relay (Farmers pattern). The highest yield (4.16 t ha-1) was recorded in T2 (BR11) which is statistically at par with T4 (4.15 t ha-1) but higher than the other treatments. Early planting sole potato (T1) gave highest yield (26.10 t ha-1) which was significantly higher than all other treatments. Late planting sole potato (T2), intercropped early potato (T3) and relay potato (T4) showed similar yield (23.61 24.79 t ha-1). Intercropped (T3) and Relay (T4) maize did not vary significantly in the studied parameters and yields were 8.21 and 7.92 t ha-1, respectively. Mungbean after sole potato (T1) gave higher number of pods/plant (17.25), and yield (1.47 t ha-1) which is significantly higher than those of T3 (14.89 and 1.28 t ha-1, respectively). Highest gross return (GR) (Tk. 417720) and gross margin (GM) (Tk. 220220) were calculated in improved pattern T3 and the lowest of those (Tk. 289670, Tk. 146020) in farmers pattern T2 . The other improved pattern T3 was the second highest performer considering GR and GM. But BCR (2.21) was highest in T1 and second highest in T3. The results indicated that the improved patterns (T1, T3) were better than farmers pattern (T2, T4). The improved pattern (T1) gave GR Tk. 67890 and GM Tk. 51785 higher than farmers pattern (T2). Similarly, the other improved pattern (T3) showed Tk. 51870 and Tk. 37395 higher than farmers pattern (T4). The improved pattern T1 and T3 created 45 working day job for the labour for harvesting early matured rice in the Monga/ jobless period (October) while farmers pattern gives only 3 days work. The mungbean included improved cropping patterns can be suggested for increased production, economic return and Monga mitigation (work opportunity in off period) in Rangpur. DOI: http://dx.doi.org/10.3329/ijarit.v4i2.22645 Int. J. Agril. Res. Innov. & Tech. 4 (2): 35-40, December, 201

An Event Study Approach to Analyse the Impact of Novel Coronavirus Disease (Covid-19) on Indian Hotel & Tourism Stocks Performance

Covid 19 or the Novel Corona Virus outbreak in 2020 has disrupted the world and Indian economy. Tourism industry has suffered the most due to this outbreak. The hotel industry stocks have experience an average fall of twenty three percent within a month of the Covid 19 outbreak. With the help of event-study approach, an attempt has been made to analyse the effect of Covid 19 on Indian hotel stock price movements. Six publicly traded hotel and tourism companies experience a steep fall in their stock prices during the Covid 19 outbreak period. On and after the day the World Health Organisation declared Covid 19 a pandemic, Indian hotel stocks exhibited significant negative cumulative mean abnormal returns, indicating a significant impact of the Covid 19 outbreak on hotel stock performance. Empirical finding can enable Businesses to prepare themselves for alternate uses like isolation wards and save themselves from economic plight

PERFORMANCE EVALUATION OF MUTUAL FUNDS IN INDIA: A CASE STUDY

In present study performance evaluation of selected mutual funds is carried out through risk-return analysis, Treynor’s ratio, Sharpe’s ratio, Jensen’s measure and Fama’s measure. The data used in the study is daily closing NAVs for the period from 1st January 2010 to 31st December 2013. The schemes selected for study consist of three public-sponsored, three private-sponsored and three private (foreign)-sponsored mutual fund schemes. The results of performance evaluation measures suggest that out of nine, three schemes namely Franklin India Tax shield-Growth. HSBC Tax Saver Equity Fund – Growth and ING Tax Savings Fund Growth schemes, performs better in comparison to benchmark index according to all the measures applied in the study and among these Franklin India Tax shield-Growth fund is the best performer. Overall it can be concluded that the private foreign companies sponsored mutual fund scheme performance is better than public and private companies–sponsored mutual fund schemes

Targeted Drug Delivery of Magnetic Nano-Particle in the Specific Lung Region

Aerosolized drug inhalation plays an important role in the treatment of respiratory diseases. All of the published in silico, in vivo, and in vitro studies have improved the knowledge of aerosol delivery in the human respiratory system. However, aerosolized magnetic nano-particle (MNP) transport and deposition (TD) for the specific position of the human lung are still unavailable in the literature. Therefore, this study is aimed to provide an understanding of the magnetic nano-particle TD in the targeted region by imposing an external magnetic field for the development of future therapeutics. Uniform aerosolized nano-particle TD in the specific position of the lung airways will be modelled by adopting turbulence k–ω low Reynolds number simulation. The Euler–Lagrange (E–L) approach and the magneto hydrodynamics (MHD) model are incorporated in the ANSYS fluent (18.0) solver to investigate the targeted nano-particle TD. The human physical activity conditions of sleeping, resting, light activity and fast breathing are considered in this study. The aerosolized drug particles are navigated to the targeted position under the influence of external magnetic force (EMF), which is applied in two different positions of the two-generation lung airways. A numerical particle tracing model is also developed to predict the magnetic drug targeting behavior in the lung. The numerical results reveal that nano-particle deposition efficiency (DE) in two different magnetic field position is different for various physical activities, which could be helpful for targeted drug delivery to a specific region of the lung after extensive clinical trials. This process will also be cost-effective and will minimize unwanted side effects due to systemic drug distribution in the lung.</jats:p

Chronic Disease Self-Management Challenges among Rural Women Living with HIV/AIDS in Prakasam, Andhra Pradesh, India: A Qualitative Study.

Rural women living with HIV/AIDS (WLHA) in India experience challenges self-managing HIV/AIDS in their rural communities. The purpose of this qualitative study was to explore factors influencing their care and antiretroviral treatment (ART) adherence. Themes that emerged from the qualitative focus groups among WLHA (N = 24) in rural Prakasam, Andhra Pradesh, India, included: (1) coming to know about HIV and other health conditions, (2) experiences being on ART, (3) challenges maintaining a nutritious diet, (4) factors affecting health care access and quality, and (5) seeking support for a better future. Chronic disease self-management in rural locales is challenging, given the number of barriers which rural women experience on a daily basis. These findings suggest a need for individual- and structural-level supports that will aid in assisting rural WLHA to self-manage HIV/AIDS as a chronic illness

Attention-based bi-directional long-short term memory network for earthquake prediction

An earthquake is a tremor felt on the surface of the earth created by the movement of the major pieces of its outer shell. Till now, many attempts have been made to forecast earthquakes, which saw some success, but these attempted models are specific to a region. In this paper, an earthquake occurrence and location prediction model is proposed. After reviewing the literature, long short-term memory (LSTM) is found to be a good option for building the model because of its memory-keeping ability. Using the Keras tuner, the best model was selected from candidate models, which are composed of combinations of various LSTM architectures and dense layers. This selected model used seismic indicators from the earthquake catalog of Bangladesh as features to predict earthquakes of the following month. and Attention mechanism was added to the LSTM architecture to improve the model’s earthquake occurrence prediction accuracy, which was 74.67%. Additionally, a regression model was built using LSTM and dense layers to predict the earthquake epicenter as a distance from a predefined location, which provided a root mean square error of 1.25

The Effective Fragment Molecular Orbital Method for Fragments Connected by Covalent Bonds

We extend the effective fragment molecular orbital method (EFMO) into treating fragments connected by covalent bonds. The accuracy of EFMO is compared to FMO and conventional ab initio electronic structure methods for polypeptides including proteins. Errors in energy for RHF and MP2 are within 2 kcal/mol for neutral polypeptides and 6 kcal/mol for charged polypeptides similar to FMO but obtained two to five times faster. For proteins, the errors are also within a few kcal/mol of the FMO results. We developed both the RHF and MP2 gradient for EFMO. Compared to ab initio, the EFMO optimized structures had an RMSD of 0.40 and 0.44 {\AA} for RHF and MP2, respectively.Comment: Revised manuscrip

Higgs production in CP-violating supersymmetric cascade decays: probing the `open hole' at the Large Hadron Collider

A benchmark CP-violating supersymmetric scenario (known as 'CPX-scenario' in the literature) is studied in the context of the Large Hadron Collider (LHC). It is shown that the LHC, with low to moderate accumulated luminosity, will be able to probe the existing `hole' in the $m_{h_1}$-$\tan\beta$ plane, which cannot be ruled out by the LEP data. We explore the parameter space with cascade decay of third generation squarks and gluino with CP-violating decay branching fractions. We propose a multi-channel analysis to probe this parameter space some of which are background free at an integrated luminosity of 5-10 fb$^{-1}$. Specially, multi-lepton final states (3\l,\, 4\l and like sign di-lepton) are almost background free and have $5\sigma$ reach for the corresponding signals with very early data of LHC for both 14 TeV and 7 TeV center of mass energy.Comment: 24 pages, 9 figures, references added as in the journal versio