The effects of the presence of weakly interacting light boson (WILB) in neutron star matter have been revisited. Direct checking based on the experimental range of symmetric nuclear matter binding energy1 and the fact that the presence of this boson should give no observed effect on the crust properties of neutron star matter, shows that the characteristic scale of WILB [Formula: see text] should be ≤2 GeV-2. The recent observational data with significant low neutron stars radii2 and the recent largest pulsar which has been precisely measured, i.e. J1903+0327 (Ref. 3) indicate that in-medium modification of WILB mass in neutron stars cannot be neglected.

We study the parameterization of cosmological model where derivative of an additional scalar field coupled to curvature tensor. We extend the Parameterized Post-Friedmannian framework for interacting dark energy theories to the model. Starting from general cosmological perturbation metric, we derive perturbed energy-momentum tensor for scalar field and parameterized the tensor. Based on the value of the parameters, we compare the model with relevant models in current literature. As the results, we find that parameterization for type 1 theories of dark energy which is explicitly coupled to dark matter, gives only 4 non-zero Parameterized Post-Friedmannian coefficients.

Agroforestry is described as the land-use system producing and conserving various agricultural, livestock, and fishery commodities combined with forestry commodities. The research aims to determine the chemical properties of the soil and types of microbial (especially the presence of soil bacterial) in the cocoa farming system. The two types of analysis were conducted: (1) Soil chemical properties included pH, C-organic, N-total, Pavailable, and Potassium; (2) the type and number of bacterial. The research from November 2018 to July 2019 at Mamuju Regency, West Sulawesi. Soil samples used the sampling method (ring and composite). The analysis results showed the soil pH ranged from acidic to slightly acidic (between 4.73-5.76). The content of C-organic ranging from (1.39-2.56%); N-total value is very low (0.20-0.25%); P-available is low (15.6-15.91 ppm) and Potassium also low (0.13-0.21 cmol kg -1 ). The genus of bacterial found in the research location: Pseudomonas in Kalonding (289 cfu), Boda Boda (238 cfu), and Sisango (220 cfu); Alkaligenes were found in Salukayu 2 (255 cfu) and Salumasa (220 cfu) and Klebsiella were found in Batupapan (265 cfu).

The purpose of this study is to determine the customers preferencesin developing UNIPIN’s mobile application that can help PT. Dua Puluh Empat Jam Online increases their sales of mobile games vouchers. Data collection methods using questionnaires and interviews on 100 gamers of UNIPIN. The research method used in this study is conjoint analysis which was preceded by Cochran Q-test to test the validity of application attributes and conjoint analysis to know the utility value of each attribute that became the main preference of gamers. The attributes tested include the attributes contained in the 7C Framework such as context, content, community, customization, communication, connection, and commerce. The results of this study are application attributes that can be applied by UNIPIN to increase their sale of mobile game vouchers which are context, content, communication, and commerce attributes. The resultsof this study are attributes that meet the need to develop UNIPIN’s mobile application in order to increase sales in the mobile gaming market are the integrated level of the contex attribute, the product-dominant level of the content attribute, the one-to-one non responding user level of the communication attribute, and high level of commerce.

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