Search results for "Operation"
showing 10 items of 2969 documents
Multi-beam cooperative frequency reuse for coordinated multi-point transmission
2010
Coordinated multi-point (CoMP) joint transmission is considered in the 3rd generation partnership project (3GPP) long term evolution (LTE)-advanced as a key technique to mitigate inter-cell interference and improve the cell-edge performance. To effectively apply CoMP joint transmission, efficient frequency reuse schemes need to be designed to support resource management cooperation among coordinated cells. However, most of the existing frequency reuse schemes are not suitable for CoMP systems due to not considering multi-point joint transmission scenarios in their frequency reuse rules. In addition, the restrictions of frequency resources in those schemes result in a high blocking probabili…
The Multilevel Model in the Computer-Generated Appraisal: A Case in Palermo
2017
The construction of a mass appraisal model requires the preliminary study of the real estate market, the sampling of sold properties, the development of a forecasting model and the verification of the appraisal results. They are generally computerised methods, that work with geo-referenced data. This experimental work has proceeded to build a mass appraisal model, collecting a data sample of sales of apartments in the city of Palermo, in the five years 2008–2012, using a multivariate statistical model (multilevel), testing the results and providing the operating applications in a scheme of online real estate valuations.
Multi-pass execution of functional logic programs
1994
An operational semantics for functional logic programs is presented. In such programs functional terms provide for reduction of expressions, provided that they ground. The semantics is based on multi-pass evaluation techniques originally developed for attribute grammars. Program execution is divided into two phases: (1) construction of an incomplete proof tree, and (2) its decoration into a complete proof tree. The construction phase applies a modified SLD-resolution scheme, and the decoration phase a partial (multi-pass) traversal over the tree. The phase partition is generated by static analysis where data dependencies are extracted for the functional elements of the program. The method g…
Contributions to the knowledge base on PV performance: Evaluation of the operation of PV systems using different technologies installed in southern N…
2011
To assist in establishing an accepted knowledge base on PV-modules and systems performance using a representative range of technologies, devices have to be installed at diverse locations, covering a broad range of environmental conditions. For the example of a high latitude location, modules and systems are installed and under investigation in southern Norway (Kristiansand region) by the University of Agder in cooperation with industrial partners. This paper presents first results of the analysis of module performance. The operational behavior of the modules is used to derive a modeling scheme applicable for performance prediction. This use is demonstrated by giving the expected annual perf…
Analisi delle evidenze epidemiologiche sui fattori di rischio indoor per malattie respiratorie e allergiche nelle strutture scolastiche [Analysis of …
2012
Il diritto a respirare aria sana nelle scuole è stato sancito già nell’anno 2001 in un documento dell’European Federation of Asthma and Allergy Associations che ha evidenziato scarsa attenzione e assenza di direttive specifiche dell’Unione Europea relativamente agli effetti sulla salute da inquinamento dell’aria nelle scuole, ed è sostenuto dal numero enorme di bambini e ragazzi che frequentano le aule scolastiche. Negli ultimi anni, a livello europeo si è sviluppato un sempre crescente interesse nei confronti dell’effetto della qualità dell’aria dell’indoor scolastico (IAQ) sulla salute dei ragazzi, e sono stati avviati numerosi progetti di ricerca internazionali mirati, appunto, a determi…
El trabajo en red y la cooperación como elementos para la mejora escolar
2021
La escuela es un entorno enriquecido de aprendizaje, pero no es el único entorno educativo. La misión educativa de la escuela debe contemplar la coordinación escuela-familia como rasgo de su proyecto social. Buena parte de este puente se fundamenta en el diálogo desde la participación de la familia con el desarrollo educativo integral, base de la noción democratizadora de la escuela. Por ello, esta aportación aborda el trabajo en red como elemento para la mejora escolar desde la cooperación. Se focaliza en el trabajo en red al servicio del aprendizaje y el conocimiento y en los equipos cooperativos como unidad de trabajo en red. Una muestra de esta forma de trabajo se concreta en dos experi…
Reoperations After First Lumbar Disk Herniation Surgery with or without Implantation of Mechanical Annular Closure Device
2019
Lumbar diskectomy is a widely performed surgical procedure in patients affected by lumbar disk herniation (LDH). Such a surgical procedure is considered to be safe and able to provide a consistent symptomatic relief in most patients. However, perioperative complications have been reported, ranging from 13% to 15%, and pose a considerable financial burden among patients, hospitals, and national health care agencies. The most common perioperative complication following lumbar diskectomy for disk herniation is the recurrence. Although the recurrence rate of LDH has been reported to be 5%−15%, its exact incidence may be underestimated. Recurrent lumbar disk herniation (rLDH) is defined as disk …
Seasonal pattern and amplitude: a logical framework to analyse seasonality in tourism. An application to bed occupancy in Sicilian hotels
2011
Many studies have investigated seasonality in tourism in terms of its causes and impacts, from both theoretical and applied perspectives. However, the definition of seasonality and, most of all, its application and measurement have not received the same degree of attention. In recognizing that seasonality has two main facets – pattern and amplitude – this paper critically examines the main seasonality measures proposed in the tourism literature, classifying them according to their properties and their most appropriate use. The framework then proposed is used to analyse a standard and comparable efficiency measure, such as the bed occupancy rate of Sicilian accommodation establishments, pla…
Assessment of wastewater treatment alternatives for small communities: An analytic network process approach
2015
The selection of the most appropriate wastewater treatment (WWT) technology is a complex problem since many alternatives are available and many criteria are involved in the decision-making process. To deal with this challenge, the analytic network process (ANP) is applied for the first time to rank a set of seven WWT technology set-ups for secondary treatment in small communities. A major advantage of ANP is that it incorporates interdependent relationships between elements. Results illustrated that extensive technologies, constructed wetlands and pond systems are the most preferred alternatives by WWT experts. The sensitivity analysis performed verified that the ranking of WWT alternatives…
Self-assessment application and learning in organizations: A special reference to the ontological dimension
2003
Quality management self-assessment is a powerful tool for management continuous improvement, and it may foster the process of learning in the organization. In this paper, we identify some links between self-assessment and learning. From the analysis of the learning processes at the three ontological levels--individual, group and organizational--and taking the contributions of Crossan et al. (1999) and Kim (1993) as a reference point, we propose a model of organizational learning. This model explicitly recognizes the importance of group level as a link between individual and organizational levels, and it can be employed in order to analyse the effect of self-assessment application at the dif…