Search results for "consumption"
showing 10 items of 1796 documents
A low power protocol to broadcast real-time data traffic in a clustered ad hoc network
2002
Energy saving is an extremely important design criteria for mobile ad hoc networks. We present the intra-cluster data-dissemination protocol (Icdp). The Icdp is used to group nodes around a special one, called the cluster leader (CL). The CL centralizes the power management mechanism and acts as a proxy for data transfer between the cluster and the rest of the nodes in the region. When a cluster node enables the power management it goes into "sleep" mode, to minimize power consumption. The CL buffers data frames for power saving stations and delivers them on the stations' request. We periodically distribute the cluster leader role among all the nodes inside the cluster, to not overload a si…
Energy-Efficient Protocol Design
2015
Recent studies have shown that the total energy consumed by the Internet has followed an increasing trend over the years. A considerable part of this energy is wasted due to an inefficient utilization of edge devices , that is, Personal Computers (PCs) and other user equipment in homes and offices. PCs are often left on even when they are not used (e.g., overnight or during weekends), while other edge devices, such as printers, IP phones, and displays, are typically kept always on , especially in public buildings. A number of solutions have been proposed for eliminating, or reducing, energy wastes caused by edge devices. In this chapter, we propose a general taxonomy for their classificatio…
College students’ attitudes towards prohealth behavior and alcohol consumption during pregnancy planning and pregnancy
2021
Background: Alcohol is one of the most commonly used psychoactive substances among students. Aim of the study: This study aimed to examine the level of pro-health behaviors among college students, and their opinions on alcohol consumption during pregnancy planning and pregnancy. Material and methods: This study was conducted in 2018 among 228 adult students in Opole secondary schools. Diagnostic surveys were used, which included the Health Behavior Inventory (HBI) and a questionnaire developed by the authors. Results: Forty-six percent (n = 105) of the 228 students presented with very low levels of pro-health behaviors and 57.46% (n = 131) of students endorsed alcohol intoxication or abuse …
Jet Engine Design Optimization Using a Knowledge-Based Master Model
2012
This paper presents a preliminary design optimization study of a jet engine structure using a knowledge-based master modeling approach. The objective function is derived based on input-output relationships of a cost-performance model, where specific fuel consumption, pressure loss and direct cost are considered. The advantage of this problem formulation is that it entails a single composite objective function that takes into account mass, structural characteristics, dynamic response and translates them to a direct operational cost function to be minimized. A fan-blade-off scenario is considered as the loading case in this paper. The loss of one fan blade during nominal operation causes a ro…
Aksjologiczne aspekty wychowania
2017
<p>Artykuł ukazuje problematykę dotyczącą aksjologicznego aspektu wychowania, jest poszukiwaniem odpowiedzi na pytanie: Jak wychowywać młodego człowieka, by potrafił poruszać się w przestrzeni aksjologicznej, umiał odkrywać, tworzyć, akceptować wartości w poszukiwaniu swojego miejsca w świecie? Uważam, że aby wychować młodego człowieka, tak by żył zgodnie z wartościami uniwersalnymi, należy zadbać o to, by potrafił uczyć się obiektywnego poznawania i respektowania wartości, rozbudzał w sobie zainteresowanie życiem wartościowym. W artykule podkreślono, że aksjologiczny wymiar aktywności człowieka ulega przekierunkowaniu na wartości niższe (hedonistyczne, utylitarne, witalne, prestiżowe…
Intergovernmental Fiscal Relations: The Efficiency Effect of Taxes, Transfers, and Fiscal Illusion
2012
The purpose of this paper is to evaluate the efficiency cost of transfers. To this end, we develop a model of individual demand decisions about the provision of a regional public good that encompasses a continuum of tax–transfer scenarios to finance regional public expenditure. We assume that individuals have identical quasi-linear preferences defined over private consumption and the regional public good, that endowment income varies between individuals and regions, and that regions have different predetermined sizes. In an economy-wide resource constrained framework we show that, despite its simplicity, this model is capable of discriminating the efficiency properties of the different scen…
Private label food products: Consumer perception and distribution strategies
2022
Food Products Private Label PL, are foods produced by the food industries on order of food distribution companies. Their characteristic is that they are similar to industrial brands but are marketed under the name of the distribution company. Over time they have spread to countries with high per capita income, so much so that today they have become an established product in the food market. Today the PL makes it possible to overcome the criticalities that small agricultural businesses have, which cannot relate to the large-scale retail trade. The PL allow the survival of the company and the permanence of the man in the rural environment. The aim of this research was to analyze the benefits …
Soil Science Challenges in a New Era: A Transdisciplinary Overview of Relevant Topics
2020
Transdisciplinary approaches that provide holistic views are essential to properly understand soil processes and the importance of soil to society and will be crucial in the future to integrate distinct disciplines into soil studies. A myriad of challenges faces soil science at the beginning of the 2020s. The main aim of this overview is to assess past achievements and current challenges regarding soil threats such as ero-sion and soil contamination related to different United Nations sustainable development goals (SDGs) including (1) sustainable food production, (2) ensure healthy lives and reduce environmental risks (SDG3), (3) ensure water availability (SDG6), and (4) enhanced soil carbo…
The spatial evaluation of the radiative human body heat exchanges: An effective contribution for limiting energy consumption and achieving better ind…
2018
Abstract Radiative heat exchanges inside buildings remarkably affect the thermal balance of the human body in confined spaces and the related thermal comfort sensations of people. The mean radiant temperature is an important component of this balance. Unfortunately, it is usually computed by means of too simplified relationships, which significantly influence the comfort evaluations. Such simplified approaches are also accountable for a less effective design of HVAC systems which, in turn, could result in high energy consumption in the climatization of buildings. However, an accurate evaluation of the mean radiant temperature, especially when high intensity sources are present in a given in…
Lifetime total and beverage specific - alcohol intake and prostate cancer risk: a case-control study
2004
Abstract Background We investigated lifetime alcohol consumption and prostate cancer risk in a case-control study conducted in Buffalo, NY (1998–2001). Methods The study included 88 men, aged 45 to 85 years with incident, histologically-confirmed prostate cancer and 272 controls. We conducted extensive in-person interviews regarding lifetime alcohol consumption and other epidemiologic data. Results Prostate cancer risk was not associated with lifetime intake of total and beverage specific ethanol. In addition we found no association with number of drinks per day (average drinks per day over the lifetime) or drinks per drinking day (average drinks per day on drinking days only over the lifet…