Pemodelan Emisi NO2 Dari Cerobong Batubara Industri Pengolahan Susu Menggunakan Software SCREEN View™

Industri pengolahan susu sebagai salah satu industri manufaktur yang ada di Kabupaten Pasuruan yang menghasilkan emisi gas buang salah satunya gas NO2 dari proses utility unit boiler/ketel uap berbahan bakar batubara. Gas NO2 ini dikeluarkan melalui cerobong dan nantinya akan menyebar menuju daerah di sekitarnya, sehingga perlu adanya penelitian mengenai sebaran gas NO2 tersebut. Tujuan dari penelitian ini adalah untuk menganalisis pola sebaran emisi NO2 pada cerobong menggunakan software SCREEN ViewTM untuk musim hujan dan kemarau. Hasil running software SCREEN ViewTM menunjukkan nilai konsentrasi maksimum NO2 saat musim hujan hujan berada pada jarak 434 meter dengan konsnetrasi maksimum 7,21 ?g/m3. Sedangkan nilai konsentrasi maksimum NO2 saat musim kemarau berada pada jarak 411 meter dengan konsentrasi maksimum 4,94 ?g/m3. Hasil konsentrasi tersebut berdasarkan nilai baku mutu udara ambien dan emisi sumber tidak bergerak bagi boiler/ketel uap berbahan bakar batubara oleh Pergub Jatim Nomor 10 Tahun 2009 masih tergolong aman karena tidak melebihi nilai ambang batas

First year nursing students use of social media within education: results of a survey

Introduction – Social media rapidly disseminates information but is a controversial learning platform in nurse education. This study aimed to explore how students viewed the use of Twitter, and other social media, in their first year of a nursing degree. Aim - The aim of this study was to evaluate first year student nurses’ use of social media, before and after commencing a pre-registration programme, where Twitter was used in a module Methodology – A cross-sectional approach using a descriptive survey was completed. Methods – An online survey, that included Likert scale and open questions, was open for one month in 2016 Sample – All students on Nursing Undergraduate Degrees, in Adult, Child and Mental Health, who were in the first year of their programme were eligible to participate. 121 students took part with a response rate of 32%. Results –Most students were positive about using social media as they found it an engaging way to promote discussion and share information. Students use of Twitter changed in the first year with 19.8% using it once or more per week on commencement of the programme which increased to 45.5%; other social media platforms remained static. Most students (57.8%) understood the purpose of using Twitter although 14% reported that it was not used within their module; thus, not all students gained experience of using the social media. 81% of students said that using Twitter had been beneficial to increase awareness of nursing issues within their course. However, there were areas that students found difficult such as time, and not knowing what to say. Conclusion –The study suggests that teaching about social media, and incorporating it into learning activities, may be beneficial for students. However, more research into the subject using an experimental design to assess changes over time would be useful

Intubación con paciente despierto con fibroscopio retromolar de Bonfils bajo sedación con dexmedetomidina Reporte de 7 casos

SUMMARYAcording to the “Practice Guidelines for management of a difficult airway”, and several algorithnes, an awake intubation is considered the first method to secure a suspected difficult airway. During last years the awake intubation was performed by flexible fiberoptic laringoscopy or with a rigid stylet. Within the last decade, many new devices have been developed to assist anesthesiologist with both routine and difficult airway management, one of wich is the Bonfils Retromolar Intubacion Fiberscope. It is a semi-rigid optical stylet 40 cm long of 5,0 external diameter and a tip curvature of 40 degrees; the adult stylet can accommodate a 6,5 mm endotracheal tube and sliding it in the superior airway, it is possible to entubate the glottis under direct vision. We present seven case report with difficult airway, managed with dexmedotomidine using the Bonfils retromolar fiberscope without topical anesthetic

Full configuration interaction approach to the few-electron problem in artificial atoms

We present a new high-performance configuration interaction code optimally designed for the calculation of the lowest energy eigenstates of a few electrons in semiconductor quantum dots (also called artificial atoms) in the strong interaction regime. The implementation relies on a single-particle representation, but it is independent of the choice of the single-particle basis and, therefore, of the details of the device and configuration of external fields. Assuming no truncation of the Fock space of Slater determinants generated from the chosen single-particle basis, the code may tackle regimes where Coulomb interaction very effectively mixes many determinants. Typical strongly correlated systems lead to very large diagonalization problems; in our implementation, the secular equation is reduced to its minimal rank by exploiting the symmetry of the effective-mass interacting Hamiltonian, including square total spin. The resulting Hamiltonian is diagonalized via parallel implementation of the Lanczos algorithm. The code gives access to both wave functions and energies of first excited states. Excellent code scalability in a parallel environment is demonstrated; accuracy is tested for the case of up to eight electrons confined in a two-dimensional harmonic trap as the density is progressively diluted and correlation becomes dominant. Comparison with previous Quantum Monte Carlo simulations in the Wigner regime demonstrates power and flexibility of the method.Comment: RevTeX 4.0, 18 pages, 6 tables, 9 postscript b/w figures. Final version with new material. Section 6 on the excitation spectrum has been added. Some material has been moved to two appendices, which appear in the EPAPS web depository in the published versio

Massive scalar field near a cosmic string

The $\zeta$ function of a massive scalar field near a cosmic string is computed and then employed to find the vacuum fluctuation of the field. The vacuum expectation value of the energy-momentum tensor is also computed using a point-splitting approach. The obtained results could be useful also for the case of self-interacting scalar fields and for the finite-temperature Rindler space theory.Comment: 15 pages, standard LaTeX, no figures. Reference [14] correcte

Thermal partition function of photons and gravitons in a Rindler wedge

The thermal partition function of photons in any covariant gauge and gravitons in the harmonic gauge, propagating in a Rindler wedge, are computed using a local $\zeta$-function regularization approach. The correct Planckian leading order temperature dependence $T^4$ is obtained in both cases. For the photons, the existence of a surface term giving a negative contribution to the entropy is confirmed, as earlier obtained by Kabat, but this term is shown to be gauge dependent in the four-dimensional case and, therefore is discarded. It is argued that similar terms could appear dealing with any integer spin $s\geq 1$ in the massless case and in more general manifolds. Our conjecture is checked in the case of a graviton in the harmonic gauge, where different surface terms also appear, and physically consistent results arise dropping these terms. The results are discussed in relation to the quantum corrections to the black hole entropy.Comment: 29 pages, RevTeX, no figures. Minor errors corrected and a few comments changed since first submission. To be published on Phys.Rev.

Revisión bibliográfica sobre estrategias no farmacológicas para la prevención primaria de la diabetes mellitus gestacional

Objective: analyze the knowledge state of the main non-pharmacological strategies for the primary prevention of gestational diabetes mellitus (GDM). Methods: narrative bibliographic review. The search for articles was carried out using MeSH terms in Pubmed, Cochrane and Google academic search engines, with the following inclusion criteria: clinical trial type studies, related to primary prevention of GDM, and non-pharmacological strategies for primary prevention of GDM, in english and spanish, published in the last five years Results: the strategies related to nutritional modifications, mainly those using a Mediterranean pattern, professionally supervised physical activity programs, educational activities initiated in the preconception stage that focus on lifestyle modification, and the use of the supplement inositol were those with positive results. Other strategies such as the use of probiotics have been inconclusive. Conclusion: the evidence proposes several non-pharmacological strategies for the primary prevention of GDM with effective results. In this context, it is suggested to strengthen the knowledge and capacity of health professionals to implement these strategies, and at the same time, to increase the development of new research that collaborates in this process.Objetivo: analizar el estado del conocimiento de las principales estrategias no farmacológicas para la prevención primaria de la diabetes mellitus gestacional (DMG). Método: revisión bibliográfica tipo narrativa. La búsqueda de artículos se hizo mediante términos MeSH en los buscadores Pubmed, Cochrane y Google académico, con los siguientes criterios de inclusión: estudios de ensayos clínicos relacionados con la prevención primaria de la DMG y estrategias no farmacológicas para la prevención primaria de la DMG en idiomas inglés y español, publicados en los últimos cinco años. Resultados: las estrategias con resultados positivos para prevenir la DMG fueron aquellas relacionadas con modificaciones nutricionales, principalmente las que utilizan un patrón mediterráneo, programas de actividad física supervisados por profesionales, actividades educativas iniciadas en la etapa preconcepcional -enfocadas en modificar el estilo de vida- y el uso del suplemento inositol. Otras investigaciones, como el uso de probióticos, no fueron concluyentes. Conclusión:  la evidencia propone diversas estrategias no farmacológicas para la prevención primaria de la DMG con resultados efectivos. En ese contexto, se sugiere fortalecer el conocimiento y la capacidad de implementar estas estrategias por parte de profesionales de la salud y, a la vez, aumentar la realización de nuevas investigaciones que colaboren en este proceso

Competing mechanisms for singlet-triplet transition in artificial molecules

We study the magnetic field induced singlet/triplet transition for two electrons in vertically coupled quantum dots by exact diagonalization of the Coulomb interaction. We identify the different mechanisms occurring in the transition, involving either in-plane correlations or localization in opposite dots, depending on the field direction. Therefore, both spin and orbital degrees of freedom can be manipulated by field strength and direction. The phase diagram of realistic devices is determined.Comment: To appear in Phys. Rev. B - Rapid Comm. - 5 pages, 3 figure

Ambiguity in the evaluation of the effective action on the cone

An ambiguity in the computation of the one-loop effective action for fields living on a cone is illustrated. It is shown that the ambiguity arises due to the non-commutativity of the regularization of ultraviolet and (conical) boundary divergencies.Comment: REVTeX file, 10 pages. Comments on recent papers have been adde