Mean Occupation Function of High Redshift Quasars from the Planck Cluster Catalog

We characterise the distribution of quasars within dark matter halos using a direct measurement technique for the first time at redshifts as high as $z \sim 1$. Using the Planck Sunyaev-Zeldovich (SZ) catalogue for galaxy groups and the Sloan Digital Sky Survey (SDSS) DR12 quasar dataset, we assign host clusters/groups to the quasars and make a measurement of the mean number of quasars within dark matter halos as a function of halo mass. We find that a simple power-law fit of \log\left = (2.11 \pm 0.01) \log (M) -(32.77 \pm 0.11) can be used to model the quasar fraction in dark matter halos. This suggests that the quasar fraction increases monotonically as a function of halo mass even to redshifts as high as $z\sim 1$.Comment: Accepted for publication in PAS

The Mayor’s Office of ThriveNYC Mental Health First Aid Training: An Evaluation Proposal to Assess Program Effectiveness, Outcomes and Financial Viability.

The Mental Health First Aid (MHFA) Training program by ThriveNYC (2015) aims to increase the understanding of mental health, to teach trainees how to respond to signs of mental distress, to connect people in need to accessible options for care, and ultimately, to reduce the stigma associated with mental illness (ThriveNYC, 2020a). The program has continued to expand over the past five years with a steady increase in the number of trainings administered (ThriveNYC, 2020a). However, this expansion does not seem to be supported by anything more than a primary evaluation of the program. Since its launch, publicly available internal evaluations of the MHFA program only highlight frequency data regarding the number of trainees who self-reported sharing or using the knowledge and/or the skills they gained to help others or themselves (NYC Open Data, 2020). There is no further evaluation into the behavioral impact on trainees, perceptions towards mental health or program fidelity. With a substantial portion of the budget allotted to the program, a thorough evaluation of the effectiveness and reach of its efforts is necessary to justify continued funding. The purpose of this proposal is to facilitate a rigorous evaluation of ThriveNYC’s MHFA program, by designing an evaluation plan that incorporates a process, short-term and mid-term outcome analysis. The evaluation proposal will aim to (1) develop an evaluation plan that has measurable goals and objectives and rigorous methods for evaluation; (2) create an instrument that measures the program’s impact on behavior, knowledge, and attitudes of trainees in relation to mental health awareness and crisis response; (3) develop a tool to measure the short-term and mid-term outcomes of the training program in relation to eliminating barriers to care; (4) create a plan to measure process goals of the program, including program inputs and fidelity. This evaluation along with its recommendations will inform the further continuation or expansion of ThriveNYC’s MHFA program

ANTIOXIDANT POTENTIAL PROFILE OF PAJANELIA LONGIFOLIA (WILLD.) K. SCHUMAN.; POTENTIAL NEW SOURCES OF NATURAL ANTIOXIDANT.

Objectives: The aim of the present work is to screen the antioxidant potentiality of the bark extracts of Pajanelia longifolia (Willd.) K. Schuman, ethnomedicinally prescribed plant as hepatoprotective. Methods: Bark extract was prepared using Soxhlet apparatus. Total phenol, flavonoid, total alkaloid were analyzed using Folin–Ciocalteu assay, aluminum chloride calorimetric assay, atropine standard, respectively. Antioxidant capacity and free radical scavenging potentialities were done by various in vitro methods, viz.; 1,1-diphenyl-2-picrylhydrazyl (DPPH), hydrogen peroxide scavenging activity, reducing power assay, metal chelating activity, ferric reducing antioxidant power (FRAP) assay, and thiobarbituric acid (TBA) method. Result: Total phenol, flavonoid, and alkaloid were found to be highest in acetone extract of P. longifolia (Willd.) K. Schuman. Acetone extracts of the bark of P. longifolia (Willd.) K. Schuman showed very low inhibitory concentration 50 (IC50) and effective concentration 50 values for DPPH assay and reducing power assay compared to other extracts. In hydrogen peroxide scavenging activity assay, the lowest IC50 value was recorded in acetone extract with 181.78±0.09 μg/ml in P. longifolia. The FRAP assay for P. longifolia acetone extract showed the highest activity at 967±0.69 μg/ml of ascorbic acid equivalent. The ferric reducing capacity and TBA values of the plant extracts confirmed the presence antioxidant principles in the bark of the said plant. Conclusion: These underused plants may be used for mitigating the detrimental effect of oxidative stress and reactive oxygen species-mediated disease and thus justifies its use in folklore medicines.Â

Rotating clusters in phase-lagged Kuramoto oscillators with higher-order interactions

The effect of phase-lag parameter in pairwise interactions has been a topic of great interest for long. However, real-world systems often have interactions that are beyond pairwise and can be modeled using simplicial complexes. We investigate the effect of the inclusion of phase-lag in coupled Kuramoto oscillators with simplicial interactions and find that it shifts the critical points at which first-order transition from cluster synchronized state to incoherent state occurs. In the thermodynamic limit, using the Ott-Antonsen approach we derive a reduced equation for order parameter measuring cluster synchronization. Further, we progress through the self-consistency method to achieve a closed form of the order parameter measuring global synchronization which was lacking in Ott-Antonsen approach. Moreover, considering polar coordinates framework we obtain rotation frequency of the clusters which comes out to be a function of the phase-lag parameter further indicating that phase-lag can be used as a control parameter to achieve a desired cluster frequency

Integrated graphene quantum dot decorated functionalized nanosheet biosensor for mycotoxin detection

Decoration of graphene quantum dots (GQDs) on molybdenum disulfide (MoS2) nanosheets serves as an active electrode material which enhances the electrochemical performance of the analyte detection system. Herein, ionic surfactant cetyltrimethylammonium bromide (CTAB)-exfoliated MoS2 nanosheets decorated with GQD material are used to construct an electrochemical biosensor for aflatoxin B1 (AFB1) detection. An antibody of AFB1 (aAFB1) was immobilized on the electrophoretically deposited MoS2@GQDs film on the indium tin oxide (ITO)-coated glass surface using a crosslinker for the fabrication of the biosensor. The immunosensing study investigated by the electrochemical method revealed a signal response in the range of 0.1 to 3.0 ng/mL AFB1 concentration with a detection limit of 0.09 ng/mL. Also, electrochemical parameters such as diffusion coefficient and heterogeneous electron transfer (HET) were calculated and found to be 1.67 x 10(-5) cm(2)/s and 2 x 10(-5)cm/s, respectively. The effective conjugation of MoS2@GQDs that provides abundant exposed edge sites, large surface area, improved electrical conductivity, and electrocatalytic activity has led to an excellent biosensing performance with enhanced electrochemical parameters. Validation of the fabricated immunosensor was performed in a spiked maize sample, and a good percentage of recoveries within an acceptable range were obtained (80.2 to 98.3%)

STATISTICAL ANALYSIS FOR PERFORMANCE COMPARISON

ABSTRAC

IN VITRO ANTIOXIDANT ACTIVITY OF BARK EXTRACTS OF OROXYLUM INDICUM (L) VENT

  Objectives: The aim of the present work is to screen the antioxidant potentiality of the bark extract of Oroxylum indicum (L) Vent, ethnomedicinally prescribed plant as hepatoprotective.Methods: Bark extracts were prepared using soxhlet apparatus. Total phenol, flavonoid, and total alkaloid were analyzed using Folin–Ciocalteu assay, aluminum chloride colorimetric assay, atropine standard, respectively. Antioxidant capacity and free radical scavenging potentialities were done by several in vitro methods, viz.; 1,1-diphenyl-2-picrylhydrazyl (DPPH), hydrogen peroxide scavenging activity, reducing power assay, metal chelating activity, ferric reducing ability of plasma (FRAP) assay, and thiobarbituric acid (TBA) method.Result: Total phenol, flavonoid, and alkaloid were found to be highest in methanolic extract of O. indicum (L) Vent. Methanolic extract of the bark showed very low inhibitory concentration (IC50) and effective concentration values for DPPH assay and reducing power assay compared to another extract. In hydrogen peroxide scavenging activity assay, the lowest IC50 value was recorded in methanolic extract with 153.45±0.06 μg/ml. The FRAP assay for O. indicum methanolic extract showed the highest activity at 940.09±0.07 μg/mL of ascorbic acid equivalent. The ferric reducing capacity and TBA values of the plant extracts confirmed the presence antioxidant principles in the bark of the said plant.Conclusion: These underused plants may be used for mitigating the detrimental effect of oxidative stress and reactive oxygen species-mediated disease and thus justifies its use in folklore medicines