Search results for "lean"
showing 10 items of 3611 documents
Kohti Leanin mukaista ohjelmistotuotantoa
2015
Kilpailu globaaleilla markkinoilla ja Japanin toisen maailmansodan jälkeinen talouskriisi johtivat Toyotalla täysin uudenlaisen tuotantomenetelmän kehittämiseen. Tämä Toyotan tuotantojärjestelmä (TPS), joka sittemmin on tullut paremmin tunnetuksi Lean-ajatteluna, on otettu käyttöön useilla aloilla.Viime vuosina Lean-periaatteita on alettu soveltamaan myös ohjelmistotuotannossa. Kirjallisuudessa esiintyy kuitenkin erilaisia näkemyksiä siitä, mitä Lean- ohjelmistotuotannolla tarkoitetaan, millä tavalla Lean-periaatteita tulisi soveltaa ja miten Leanin mukaista toimintaa voidaan arvioida. Tämän kirjallisuuskatsauksen tarkoituksena on esitellä teollisuustuotannon ja ohjelmis…
Risposta vegeto-produttiva di Nerium oleander L. alla concimazione con formulati a lenta cessione e a cessione controllata
2010
L'utilizzo dei concimi a lento effetto è ormai molto diffuso in agricoltura. Il vantaggio di questi formulati, rispetto a quelli tradizionali, è dato dalla loro capacità di alimentare continuamente la pianta, grazie alla particolare struttura dei granuli, e di limitare le perdite di azoto nel substrato di coltura. La solubilizzazione dei concimi a lento rilascio o la liberazione dei principi attivi dei formulati a cessione controllata sono strettamente correlate all'attività microbica ed alle temperature del mezzo di coltura, per cui le piante possono reperire dal substrato quantitativi diversi in funzione delle condizioni ambientali. La ricerca è stata condotta al fine di valutare la rispo…
Donor-π-acceptors containing the 10-(1,3-dithiol-2-ylidene)anthracene unit for dye-sensitized solar cells
2012
Two donor-acceptor molecular tweezers incorporating the 10-(1,3-dithiol-2-ylidene)anthracene unit as donor group and two cyanoacrylic units as accepting/anchoring groups are reported as metal-free sensitizers for dye-sensitized solar cells. By changing the phenyl spacer with 3,4-ethylenedioxythiophene (EDOT) units, the absorption spectrum of the sensitizer is red-shifted with a corresponding increase in the molar absorptivity. Density functional calculations confirmed the intramolecular charge-transfer nature of the lowest-energy absorption bands. The new dyes are highly distorted from planarity and are bound to the TiO(2) surface through the two anchoring groups in a unidentate binding for…
Towards Measuring the Agility of Software Business
2018
Agile development methods have been employed across the software industry. However, it is not always clear if the used methods actually help the software firms in being more agile and if agility has a positive influence in the software firm performance. Studying these questions may turn out impossible since good measurements for assessing the overall agility of software firms do not yet exist. A need is therefore detected to measure the differences in agility between firms and finding the means to evaluate the differences in agility in reliable manner. This article examines how to measure the agility of a software firm and reports initial steps in the process of developing measurement instr…
Alleanze e parentele Le “affinità elettive” nella storiografia sulla Sicilia antica. Atti del Convegno internazionale Palermo 14-15 aprile 2010
2010
Nel 1966, parlando della Sicilia, Fernand Braudel la definiva un “continente in miniatura”, assegnandole già quelle caratteristiche di microcosmo che ne hanno fatto, nel corso dei secoli, un laboratorio privilegiato d’indagine sulle dinamiche d’interazione tra le civiltà antiche. Per la sua posizione, centrale e facilmente accessibile dal mare, per le sue dimensioni, per la fertilità del suo territorio, l’isola diventò presto crocevia di uomini, terreno d’incontro e di scontro tra città ma anche tra ethne di origine diversa. Se, da un lato è vero che le vicende della Sicilia possono leggersi attraverso i momenti di conflitto e di cesura che, di volta in volta, la attraversarono; dall’altro,…
Partial-order reduction for parity games and parameterised Boolean equation systems
2022
AbstractIn model checking, reduction techniques can be helpful tools to fight the state-space explosion problem. Partial-order reduction (POR) is a well-known example, and many POR variants have been developed over the years. However, none of these can be used in the context of model checking stutter-sensitive temporal properties. We propose POR techniques for parity games, a well-established formalism for solving a variety of decision problems, including model checking. As a result, we obtain the first POR method that is sound for the full modal $$\upmu $$ μ -calculus. We show how our technique can be applied to the fixed point logic called parameterised Boolean equation systems, which pro…
Le costituzioni partecipate nell’area andina: esperienze costituenti a confronto in vista dell’elezione dell’Assemblea costituente cilena
2021
Il presente contributo trae spunto dal vivace dibattito sul processo costituzionale attualmente in corso in Cile che manifesta già alcuni elementi procedurali precedentemente sperimentati in altri ordinamenti geograficamente e culturalmente affini, quali la Colombia, l’Ecuador e la Bolivia. Le esperienze scelte, oggetto di analisi, sono considerate come pioniere di un nuovo modello di processo costituente, affermatosi nell’area andina, nel quale la partecipazione popolare permea l’intera procedura di elaborazione della nuova norma fondamentale. L’analisi del carattere partecipativo dei processi costituenti analizzati si intreccia con un ulteriore profilo di indagine, inerente agli effetti c…
Pickering Emulsion Gels Based on Halloysite Nanotubes and Ionic Biopolymers: Properties and Cleaning Action on Marble Surface
2019
We have fabricated ecocompatible Pickering emulsions based on halloysite nanotubes and ionic biopolymers (chitosan and pectin) from renewable resources. The effect of pectin and chitosan on the Pickering emulsion was investigated by direct visualization of the oil droplets and by the thermodynamic characterization at the interface. Pectin enhances the Pickering emulsion stability, while a phase separation and nonhomogeneous gel was observed in the presence of chitosan. We have demonstrated that the Pickering emulsion in a pectin based gel phase is suitable for wax layer removal from a marble surface. A controlled cleaning is achieved by tuning the contact time between the gel and the marble…
Orchestrating 21st century learning in higher education : A perspective on student voice
2017
For universities to meet the 21st-century learning needs of today's students, it is important they allow students to take an active role in developing pedagogy and sharing their perspective. This paper introduces design-based research aiming to develop a pedagogic approach to support technology-enhanced learning practices at the university level with the focus on teacher orchestration of learning activities and student voice. Drawing from the perspectives of teachers and students who participated in a course focused on learning and 21st-century competencies, four main elements indicating student voice and technology-enhanced pedagogy are presented: increased interaction among university com…
New Evidence of the Enhanced Elimination of a Persistent Drug Used as a Lipid Absorption Inhibitor by Advanced Oxidation with UV-A and Nanosized Cata…
2019
This work demonstrates new evidence of the efficient destruction and mineralization of an emergent organic pollutant using UV-A and titanium nanosized catalysts. The target compound considered in this work is the primary metabolite of a lipid regulator drug, clofibrate, identified in many studies as refractory during conventional wastewater treatment. The photocatalytic performance study was carried out in batch mode at laboratory scale, in aqueous suspension. Kinetic data showed that titanium dioxide P25 Aeroxide® exhibits the highest photocatalytic efficiency compared to the other investigated catalysts. Pollutant degradation and mineralization efficiencies strongly increased when decreas…