Penentuan Waktu Optimum dalam Pembuatan Bioetanol dari Bonggol Pisang Tanduk(Musa Paradisiaca Formatypisa) melalui Fermentasi

Banana tuber contains 76% starch as a source of organic material that can be changed to bioethanol which is an alternative of fuel oil. This study aimed to determine the optimum time of fermentation in the process of producing bioethanol from banana (musa paradisiaca formatypisa) tuber. In this study the fermentation of banana tuber is determined using saccharomyces cereviseae with the variation time of 3, 4, 5, 6, 7, 8 and 10 days. The stages carried out in this study were preliminary or sample preparation, delignification, hydrolysis, fermentation and separation. Bioethanol from the fermented ricestraw was analyzed using alcoholmeter. The content of bioethanol product increased on days 3 to 7 and reach the optimum on the day 7 which was 8.90%, where on the day 8 and 10 decreased the ethanol content

Theoretical investigation of new organic materials based on fluorene and thiophene for photovoltaic applications

In this study, five compounds of novel acceptor-donor organic materials containing 9,9-d imethyl-9H-fluoren, (2,5) dimethyloxy-4-(thiophen-2yl) thiophene linked to cyanoacrylic acid via several dyes  based alternating donors are investigated. The geometries, electronic absorption and emission spectra of these six compounds are studied by Density Functional Theory (DFT) and Time-Dependent Density Functional Theory (TD/DFT) calculations. The HOMO, LUMO, Gap energy, λmax, Voc of these compounds have been calculated and reported in this paper. The objective of this study; is to evidence the relationship between chemical structure of these organic materials and their properties optoelectronic of ways has conceive thereafter the compounds with effective character for solar cells.

Is there still a place for the concept of therapeutic regression in psychoanalysis?

The author uses his own failure to find a place for the idea of therapeutic regression in his clinical thinking or practice as the basis for an investigation into its meaning and usefulness. He makes a distinction between three ways the term ‘regression’ is used in psychoanalytic discourse: as a way of evoking a primitive level of experience; as a reminder in some clinical situations of the value of non-intervention on the part of the analyst; and as a description of a phase of an analytic treatment with some patients where the analyst needs to put aside normal analytic technique in order to foster a regression in the patient. It is this third meaning, which the author terms “therapeutic regression” that this paper examines, principally by means of an extended discussion of two clinical examples of a patient making a so-called therapeutic regression, one given by Winnicott and the other by Masud Khan. The author argues that in these examples the introduction of the concept of therapeutic regression obscures rather than clarifies the clinical process. He concludes that, as a substantial clinical concept, the idea of therapeutic regression has outlived its usefulness. However he also notes that many psychoanalytic writers continue to find a use for the more generic concept of regression, and that the very engagement with the more particular idea of therapeutic regression has value in provoking questions as to what is truly therapeutic in psychoanalytic treatment

Comparison of Shear and Compression Jammed Packings of Frictional Disks

The article of record as published may be found at https://doi.org/10.1007/s10035-019-0964-9We compare the structural and mechanical properties of mechanically stable (MS) packings of frictional disks in two spatial dimensions (2D) generated with isotropic compression and simple shear protocols from discrete element modeling (DEM) simulations. We find that the average contact number and packing fraction at jamming onset are similar (with relative deviations 0 for MS packings generated via simple shear. To investigate the difference in the stress state of MS packings, we develop packing-generation protocols to first unjam the MS packings, remove the frictional contacts, and then rejam them. Using these protocols, we are able to obtain rejammed packings with nearly identical particle positions and stress anisotropy distributions compared to the original jammed packings. However, we find that when we directly compare the original jammed packings and rejammed ones, there are finite stress anisotropy deviations ����̂ ����. The deviations are smaller than the stress anisotropy fluctuations obtained by enumerating the force solutions within the null space of the contact networks generated via the DEM simulations. These results emphasize that even though the compression and shear jamming protocols generate packings with the same contact networks, there can be residual differences in the normal and tangential forces at each contact, and thus differences in the stress anisotropy.The authors (P.W., N.T.O. and C.S.O.) thank the Army Research Laboratory for supporting the research carried out in this work. This research was sponsored by the Army Research Labora- tory under Grant No. W911NF-17-1-0164 (P.W., N.T.O., and C.S.O.). Computing resources were provided by the Army Research Labora- tory Defense University Research Instrumentation Program Grant No. W911NF-18-1-0252. In addition, we acknowledge support from the China Scholarship Council Grant No. 201806210283 (F. X.).The authors (P.W., N.T.O. and C.S.O.) thank the Army Research Laboratory for supporting the research carried out in this work. This research was sponsored by the Army Research Labora- tory under Grant No. W911NF-17-1-0164 (P.W., N.T.O., and C.S.O.). Computing resources were provided by the Army Research Labora- tory Defense University Research Instrumentation Program Grant No. W911NF-18-1-0252. In addition, we acknowledge support from the China Scholarship Council Grant No. 201806210283 (F. X.)

Alternative approach to electromagnetic field quantization in nonlinear and inhomogeneous media

A simple approach is proposed for the quantization of the electromagnetic field in nonlinear and inhomogeneous media. Given the dielectric function and nonlinear susceptibilities, the Hamiltonian of the electromagnetic field is determined completely by this quantization method. From Heisenberg's equations we derive Maxwell's equations for the field operators. When the nonlinearity goes to zero, this quantization method returns to the generalized canonical quantization procedure for linear inhomogeneous media [Phys. Rev. A, 43, 467, 1991]. The explicit Hamiltonians for the second-order and third-order nonlinear quasi-steady-state processes are obtained based on this quantization procedure.Comment: Corrections in references and introductio

Exploring the psychological rewards of a familiar semirural landscape: connecting to local nature through a mindful approach

This study analyses a 53,000 word diary of a year engaging with nature through over 200 trips to a semi-rural landscape. Thematic analysis revealed two themes; the transition from observer to nature connectedness and the ways in which the natural environment was experienced once a connection was made. These themes are discussed in relation to theories that seek to explain the positive effect of nature and nature connectedness. The findings are important as they suggest that repeated engagement with local semi-rural countryside can lead to a mindful approach and psychological rewards that do not require travel into the wilderness. The work informs further research into outcomes and processes of nature based interventions such as: trip frequency, duration and diary keeping