Search results for "Timo"
showing 10 items of 2111 documents
Joint Spectral and Energy Efficiency Optimization for Downlink NOMA Networks
2020
Non-orthogonal multiple access (NOMA) holds the promise to be a key enabler of 5G communication. However, the existing design of NOMA systems must be optimized to achieve maximum rate while using minimum transmit power. To do so, this paper provides a novel technique based on multi-objective optimization to efficiently allocate resources in the multi-user NOMA systems supporting downlink transmission. Specifically, our unique optimization technique jointly improves spectrum and energy efficiency while satisfying the constraints on users quality of services (QoS) requirements, transmit power budget and successive interference cancellation. We first formulate a joint problem for spectrum and …
Mitigating forest biodiversity and ecosystem service losses in the era of bio-based economy
2018
Forests play a crucial role in the transition towards a bioeconomy by providing biomass to substitute for fossil-based materials and energy. However, a policy-policy conflict exists between the desire to increase the utilization of bio based renewable resources and the desire to protect and conserve biodiversity. Increasing forest harvest levels to meet the needs of the bioeconomy may conflict with biodiversity protection and ecosystem services provided by forests. Through an optimization framework, we examined trade-offs between increasing the extraction of timber resources, and the impacts on biodiversity and non-wood ecosystem services, and investigated possibilities to reconcile trade-o…
3D-grafiikan optimointi mobiilialustalle Unity-ympäristössä
2016
Mobiilimarkkinoilta löytyy hyvin laaja kirjo erilaisia mobiilipelejä. Mobiililaitteet ovat laajimmalle levinnyt tietokonemuoto. Viimevuosina mobiililaitteiden graafiset ominaisuudet ovat nousseet sellaiselle tasolle, että niillä voidaan renderöidä upeita 3Dympäristöjä reaaliajassa. Silti mobiililaitteet vaativat optimointia sulavaan peligrafiikan laskemiseen. Tämä pro gradu tutkielma paneutuu 3D-mobiiligrafiikan optimointiin keskittyen Unity-pelimoottoriin. Teoriaosuudessa käydään läpi 3D-grafiikan luomisen peruskäytänteitä siirtyen Unityn käyttämään OpenGL ES liukuhihnaan ja sen optimointimahdollisuuksiin. Käytännön osuudessa testataan kolmioiden, valaistuksen, sekä varjostimien vaikutusta…
Organic consumption and consumer participation in food community networks
2012
Due to improvements in welfare, new food consumption concerns have emerged in Europe. Such concerns go beyond issues related to food safety and market prices. Solidarity Purchasing Groups (GASs) are one way to combine utilitarian and ethical aspects: in these groups the trade in organic products predominates. The aim of GAS groups is to primarily develop a local economy which is both ethical and fair, providing networks of economic solidarity through social relations and economic-territorial districts. This paper sets out to determine the profiles of the consumer groups that constitute GASs in Sicily (southern Italy) in order to search for key elements of the movement in terms of both commu…
Organic farming and economic sustainability: The case of Sicilian durum wheat
2014
In last years, the organic farming in the world is developing rapidly and Italy is the sixth country for organic area. Sicily is the main organic area of Italian territory and represents the first region for organic cereals. Among these durum wheat is the crop most widespread, especially in the hilly hinterland areas. The paper aims to analyze the economic sustainability of organic durum wheat. For this purpose, it has been determined the gross m argin of whea t within crop rotations of the Sici lian hilly hinterland, comparing 10 organic farms with 10 conventional farms. The results show a higher gross margin of organic wheat respect to conventional one, due to lower variable costs and hig…
Economic and Financial Comparison between Organic and Conventional Farming in Sicilian Lemon Orchards
2015
Sicily has a long tradition in citrus fruit cultivations that with vineyard and olive tree represent the main Mediterranean tree crops. In this paper we have evaluated the economic and financial sustainability of lemon production, both in organic farming and in conventional farming
Agritourism, between legislation and marketing: A leading sector for local development the case of the province of Palermo
2018
This work stems from a desire to understand the dynamics of a sector that is of particular interest for the economy and regional development of Sicily. Due to its geographical position, rich history, and natural beauty, Sicily is a year-round attraction for large numbers of tourists from all over the world. In this respect, it is vital to invest in the local area, to try to maintain and increase the potential that the territory itself can offer. With this work, we consider the agritourism sector to specifically assess its potential interest for business people and consumers, both actual and potential. Indeed, if on one side modern tourism was born from a desire to visit faraway places, it i…
Lo scenario economico dell'ortofrutticoltura in Sicilia. Un'indagine empirica sulle strategie organizzative e gestionali delle imprese
2011
The fruit and vegetable industry has registered many transformations in recent years. Some of its determinants are the intensification of opening markets, the emergence of large-scale retail trade in distribution system, both domestic and international, the changes in agricultural policy. The horticultural sector has a great economic importance in Sicily, contributing significantly to the value added of the agro-food sector. The present study, funded by the Regional Department of Infrastructure, Transport and Mobility, arise from the recognition of this importance. It aims to outline the economic framework of the sector through the analysis of official statistics and an empirical investigat…
The recreational value of botanic garden events: A case study of the Zagara plant fair in Palermo, Italy
2022
Botanic gardens are defined by their mission to maintain living plant collections for scientific research, conservation, display and education. This mission represents the potential ecosystem services that botanic gardens aim to produce, with display and education specifically regarding recreational ecosystem services (RES). Visitors must directly experience botanic gardens to transform these potential RES into real benefits, yet the public may not be interested in studying plants during their leisure time. Thus, botanic gardens turn to events to attract visitors. The objective of this study is to estimate the RES benefits created by a botanic garden event and profile the visitors that it b…
Leishmaniasis mucocutánea labial, las apariencias pueden engañar.
2019
espanolLa leishmaniasis es una infeccion endemica en nuestro medio. Dentro de sus presentaciones, la forma mucocutanea es la menos frecuente. A pesar de ello se ha de tener en cuenta incluso en casos clinicamente sugestivos de patologia tumoral, como el que presentamos. EnglishLeishmaniasis is an endemic disease in the mediterranean region. Although mucocutaneous presentation is not frequent, we should considerate it in the differential diagnosis of tumoral pathology.