Prediction of service life of polymeric sealant compositions for fuel tanks in aerospace structures from measurements of viscoelastic properties Annual report

Prediction of service life of polymeric sealers for fuel tanks from viscoelastic measurement

Komunikasi Antarpribadi Pimpinan dan Pegawai dalam Meningkatkan Motivasi Kerja di Kantor Desa Dayun Kabupaten Siak

A process that will always happen in an institution is a communication process. Through communication process information exchange, ideas and experiences. Communication between leaders and employees must always be honest and built based on trust and open attitude between each other to build spirit dan motivation in work.The purpose of this study to know the openness, empathy, positive behavior, supportive attitude and equality of interpersonal communication of leaders and employees in improving work motivation in the office of Dayun village. This research uses qualitative research method with self disclosure. Subject of research consists of one person leadership, three employees and two people as a supporting informant selected by using purposive sampling technique. This study uses data collection techniques interviews, observation and documentation research.Research results show that (a) openness, leadership and employees always emphasize that every existing and involved line must be open to each other without being covered by each other. (b) empathy, leaders always closer, give attention and feel that is being felt by employees so that employees feel cared for and can improve work motivation. (c) positive behavior, either employees or leaders never arise sespicion. Leaders always apply positive thinking to employees, so that employees can work well and comfortable. (d) supportive attitude, leadership and employees always support each other in any case for the achievement of the goal of providing the best service for community, and (e) equality, the leadership never distinguishes caste any degree between him and his servants. He imposed the same thing to improve work motivation and actieve goals

Electrophysiology and Fluorescence Spectroscopy Approaches for Evaluating Gamete and Embryo Functionality in Animals and Humans

This review has examined two of the techniques most used by our research group for evaluating gamete and embryo functionality in animal species, ranging from marine invertebrates to humans. Electrophysiology has given access to fundamental information on some mechanisms underpinning the biology of reproduction. This technique demonstrates the involvement of ion channels in multiple physiological mechanisms, the achievement of homeostasis conditions, and the triggering of profound metabolic modifications, often functioning as amplification signals of cellular communication. Fluorescence spectrometry using fluorescent probes to mark specific cell structures allows detailed information to be obtained on the functional characteristics of the cell populations examined. The simple and rapid execution of this methodology allowed us to establish a panel helpful in elucidating functional features in living cells in a simultaneous and multi-parameter way in order to acquire overall drafting of gamete and embryo functionality

Ocean Planet or Thick Atmosphere: On the Mass-Radius Relationship for Solid Exoplanets with Massive Atmospheres

The bulk composition of an exoplanet is commonly inferred from its average density. For small planets, however, the average density is not unique within the range of compositions. Variations of a number of important planetary parameters--which are difficult or impossible to constrain from measurements alone--produce planets with the same average densities but widely varying bulk compositions. We find that adding a gas envelope equivalent to 0.1%-10% of the mass of a solid planet causes the radius to increase 5-60% above its gas-free value. A planet with a given mass and radius might have substantial water ice content (a so-called ocean planet) or alternatively a large rocky-iron core and some H and/or He. For example, a wide variety of compositions can explain the observed radius of GJ 436b, although all models require some H/He. We conclude that the identification of water worlds based on the mass-radius relationship alone is impossible unless a significant gas layer can be ruled out by other means.Comment: 5 pages, 3 figures, accepted to Ap

Pump polarization-state preservation of picosecond generated white-light supercontinuum

Supercontinuum (SC) generation is among the most interesting nonlinear optical effects lately discovered, due to the complexity of the mechanisms responsible for its generation. This phenomenon, first demonstrated by Alfano and Shapiro using picosecond pulses in condensed phase, has found novel applications in optical pulse compression, timeresolved spectroscopy and material characterization among many others. Here, we demonstrate that picosecond generated SC white-light in water preserves the polarization state: linear, elliptical and circular of the pump source. Moreover, we were able to determine the SC polarization rotation direction in the circular case. With the generation of pulsed circularly polarized SC, new studies and applications are envisaged in the biological, medical and pharmaceutical field. Amino acids, involved in the origin of life, and other chiral structures represent an attractive target for this type of study

Safety of guselkumab in hepatitis B virus infection

Reactivation of hepatitis B virus (HBV) following the use of TNF antagonists has been reported and is a contraindication to use of these medications. Although the risk of reactivation of HBV during use of ustekinumab and secukinumab is low in patients with only HBV core antibody positivity, the risk is substantial in patients with chronic HBV infection. Less information is available regarding the use of pure IL-23 antagonists. Herein we discuss the successful treatment with guselkumab of a patient with HBV core antibody positivity, without evidence of HBV reactivation or other liver complications