Search results for "LTE"

Output Impedance Improvement Using Coupled Inductors

2017

When using a single DC/DC converter with multiple outputs and having a buck topology, which has one filter inductor per output, the designer can choose to couple these outputs together. This paper demonstrates additional benefits of coupling output inductors together. Apart from saving mass and volume, and due to an improved small signal behaviour it also reduces the output impedance of the regulated output. The paper will analyse a seven output push-pull converter used as a space power converter module and verify the theoretical results with experimental measurements.

Direct electricity production from coconut oil - the electrooxidation of coconut oil in an acid electrolyte

2018

Supplying more and more energy is an essential task of today's energy industry. In the last few decades, in addition to traditional methods of energy production, alternative energy sources have been developing at a fast rate. One of the devices that can use these sources is the fuel cell (FC). FCs can be a power source of the future mainly due to their high efficiency, their low impact on the environment and the possibility of powering with different fuels. Most often, FCs are powered by hydrogen. However, issues with its cheap production and storage are the reasons for seeking new fuels for FCs. Yet it must be a fuel that will provide a zero or low emission level. One of these fuels can be…

Un viceré e la crisi. Il marches di Los Veles nella Rivolta palermitana del 1647

2012

Metabolism via arginase or nitric oxide synthase: two competing arginine pathways in macrophages

2014

Macrophages play a major role in the immune system, both as antimicrobial effector cells and as immunoregulatory cells, which induce, suppress or modulate adaptive immune responses. These key aspects of macrophage biology are fundamentally driven by the phenotype of macrophage arginine metabolism that is prevalent in an evolving or ongoing immune response. M1 macrophages express the enzyme nitric oxide synthase (NOS), which metabolizes arginine to nitric oxide (NO) and citrulline. NO can be metabolized to further downstream reactive nitrogen species, while citrulline might be reused for efficient NO synthesis via the citrulline-NO cycle. M2 macrophages are characterized by expression of the…

Pathophysiology of age-related diseases

2009

Abstract A Symposium regarding the Pathophysiology of Successful and Unsuccessful Ageing was held in Palermo, Italy on 7-8 April 2009. Three lectures from that Symposium by G. Campisi, L. Ginaldi and F. Licastro are here summarized. Ageing is a complex process which negatively impacts on the development of various bodily systems and its ability to function. A long life in a healthy, vigorous, youthful body has always been one of humanity's greatest dreams. Thus, a better understanding of the pathophysiology of age-related diseases is urgently required to improve our understanding of maintaining good health in the elderly and to program possible therapeutic intervention.

Vitamin D, allergies and asthma: focus on pediatric patients

2014

In recent years, the interest of the scientific world towards vitamin D gradually increased, and several studies have been conducted to dissect its possible role in modulating the development/course of allergic diseases. Also, Vitamin D supplementation has been assessed as a beneficial approach for treating allergies in some, but not all studies. We reviewed herein the available and relevant literature concerning the possible links between Vitamin D, its supplementation and allergic diseases. A literature search was made independently by the Authors, identifying articles for a narrative review. As per literature, Vitamin D plays a key role in calcium and phosphate metabolism, and it is esse…

Alternative UNC13D Promoter Encodes a Functional Munc13-4 Isoform Predominantly Expressed in Lymphocytes and Platelets

2020

Autosomal recessive mutations in genes required for cytotoxicity are causative of a life-threatening, early-onset hyperinflammatory syndrome termed familial hemophagocytic lymphohistiocytosis (FHL). Mutations in UNC13D cause FHL type 3. UNC13D encodes Munc13-4, a member of the Unc13 protein family which control SNARE complex formation and vesicle fusion. We have previously identified FHL3-associated mutations in the first intron of UNC13D which control transcription from an alternative transcriptional start site. Using isoform specific antibodies, we demonstrate that this alternative Munc13-4 isoform with a unique N-terminus is preferentially expressed in human lymphocytes and platelets, as…

Investigating the professional agency of secondary school English teachers in South Korea

2020

This qualitative study examines the professional agency of secondary English teachers in Midwestern South Korea. Specifically, it investigates how secondary English teachers in South Korea understand their professional agency and what mediates their professional agency. The ecological approach in this study recognises that agency encompasses both individual and environmental dimensions and is formed through the constant interplay between the individual and the environment. The dataset for this study comprises 15 semi-structured interviews with secondary English teachers in South Korea. The thematic analysis highlights a significant gap between Korean English teachers’ espoused agency and re…

Subject case alternation in negated existential, locative, and possessive clauses in Latvian

2018

[full article and abstract in English]
 The goal of this article is to analyse the alternation between the genitive and nominative cases in Latvian. As the alternation between genitive and nominative cases is possible in all clauses in which the verb būt ‘to be’ is used as an independent verb, this article examines existential, locative, and also possessive clauses, while also demonstrating that distinguishing these clause types is problematic for Latvian utilising the criteria given in the linguistic literature. Clauses containing the negative form of būt ‘to be’, i.e. nebūt, form the foundation of those selected for this study, as only in these sentences the genitive/nominative alter…

Neologia i gramàtica: entre el neologisme lèxic i el neologisme sintàctic

2015

Resum: En aquest treball es mira de contribuir a objectivar el concepte de neologia sintàctica, de manera que pugui ser un recurs classificatori operatiu. La proposta és utilitzar l’expressió neologisme sintàctic per referir-nos als canvis de règim verbal que no són concomitants amb canvis semàntics (ja que llavors haurem de parlar de neologisme semàntic), i que tampoc concorren amb altres procediments neològics. En aquest sentit, un neologisme sintàctic no és un neologisme lèxic, una paraula nova, com sí que ho són els neologismes semàntics. Quan diem que el neologisme sintàctic exclou el canvi semàntic, però, no ens referim al significat relacionat amb les propietats estructurals de tipus…