197,665 research outputs found
Direct access to markets by farmers and the role of traders: insights from Kenyan and Tanzanian leafy vegetables markets
No full textThe research literature shows that agriculture has potential for development, job creation and structural change if agricultural
value chains are considered in their entirety: from inputs, to farm, through processing, until marketing. This is particularly
important in the case of Africa, where agriculture contributes in a major way to GDP and employment. However, this focus on
value chains does not seem to have been accompanied by attention to the diversity of actors operating along value chains.
Based on an extensive literature review on access to markets by farmers and on participatory research with farmers, traders,
and sectoral stakeholders of leafy vegetables value chains in Kenya and Tanzania, this study argues that the role played by
traders in local fresh produce markets in Africa is poorly understood and supported. It is argued that powerful narratives about
the benefits of direct access to market by farmers, which are also present in academic literature, are sometimes overoptimistic,
or interpreted beyond their scope and applied regardless of the specific features of actors and produce. The study shows that
the leafy vegetables trade provides self-employment for many women, and that it has positive impacts on other groups, notably
farmers
Review of \u3cem\u3eElder Suicide: Durkheim’s Vision\u3c/em\u3e by Stephen M. Marson
No full textReview of Elder Suicide: Durkheim’s Vision by. Stephen M. Marson, NASW Press (2019)
Sur des objets provenant de fouilles exécutées à Marson (Marne) par M. Auguste Nicaise
No full textBertrand Alexandre. Sur des objets provenant de fouilles exécutées à Marson (Marne) par M. Auguste Nicaise. In: Comptes rendus des séances de l'Académie des Inscriptions et Belles-Lettres, 29ᵉ année, N. 3, 1885. pp. 233-235
sj-pdf-1-chl-10.1177_17475198221079498 – Supplemental material for A stepwise lactol carbocyclisation to bridged ethers via a keto–acetal cascade
No full textSupplemental material, sj-pdf-1-chl-10.1177_17475198221079498 for A stepwise lactol carbocyclisation to bridged ethers via a keto–acetal cascade by Sean McCarthy and Charles M Marson in Journal of Chemical Research</p
A Short Walk along the Gravimeters Path
No full textThe history of gravity measurements begun in 1604 with Galileo Galilei experiments on the acceleration due to the gravity force of the earth, g, along inclined planes. In his memory, the most used unit to measure g is the gal (10−2 m/s2). The paper takes the interested reader through a walk along some of the most important achievements in gravity measurements and gives some perspectives for future developments in terrestrial gravity
Nuove forme dell'abitare. Abitare collettivo dentro e oltre la città del capitalismo cognitivo.
No full textCon la crisi del capitalismo fordista e il graduale passaggio al “capitalismo cognitivo”, e con la parallela crisi della classe media, vi è una grande diffusione di 'lavoratori della conoscenza'. In tale contesto, una volta uscite dall’ambito familiare, dopo la conclusione degli studi, per queste nuove figure termini come flessibilità, precarietà e mobilità diventano dei veri e propri modus vivendi. La ricerca “Nuove Forme dell’Abitare” affronta i modi di vita, di come abitano e lavorano i knowledge workers (i lavoratori della conoscenza) mettendo a tema gli aspetti domestici, i problemi dell’accesso all’abitazione e l’inadeguatezza delle tipologie contemporanee rispetto ai nuovi habitus, utilizzando la definizione dell’abitare collettivo del poeta e critico dell’avanguardia cecoslovacca Karel Teige, nel suo noto testo del 1932 'The Minimum Dwelling'.
Questo lavoro, maturato e approfondito attraverso la collaborazione con Dogma nella ricerca finalizzata con il libro 'Loveless: The Minimum Dwelling and its Discontents', approfondisce il rapporto tra spazio individuale (della stanza) e gli spazi collettivi (del lavoro intellettuale e del lavoro domestico) con l’aggiunta di altri spazi relativi alla formazione e alla conoscenza (lifelong learning), essenziali per il modo in cui lavorano (e si prestano ad entrare nel mondo del lavoro cognitivo) questi 'eterni-studenti'. I College medievali di Oxford e Cambridge, i campus jeffersoniani, i Residential Hotels americani e le Dom-Kommuna sovietiche degli anni ’20 descrivono sia dei paradigmi spaziali dell’abitare che degli habitus che hanno anticipato quelli dei knowledge workers odierni. In questa tesi di dottorato, i modelli organizzativi di queste esperienze paradigmatiche vengono rivisitati e declinati rispetto a diverse categorie e tipi spaziali che possono ancora riconoscersi in determinate esperienze contemporanee, per poi corrispondere a dei programmi dell’abitare pensati per gli habitus di oggi.
Il progetto teorico Long Nights è una sintesi dei principali casi di studio reinterpretati in forma di prototipi dell’abitare, da applicare nell’ottica di un Welfare da ristrutturare e rifondare affinché ciascun lavoratore, una volta fuori dall’ambito domestico dei genitori e una volta liberato dalle forme di sfruttamento del lavoro precario, possa trovare, sempre, globalmente un luogo tale da considerare casa.With the crisis of Fordist capitalism and the gradual passage to “cognitive capitalism”, paralleled by the actual middle-class crisis, there is a spread of 'knowledge workers'. In such a context, once away from the sphere of the family, after concluding the university studies, for these new figures terms like flexibility, precariousness and mobility becomes new modus vivendi. The research “New Forms of Dwelling” deals with these ways of life, of how these knowledge workers live and work. The thesis focuses on the domestic aspects, housing affordability and the inadequacy of actual dwelling typologies to the new habitus of these working class. It assumes the definition of ‘collective dwelling' given by the Czechoslovakian avant-garde poet ad critic Karel Teige in his book 'The Minimum Dwelling' of 1932.
This work, matured through the collaboration with Dogma in the research for the book 'Loveless: The Minimum Dwelling and its Discontents', investigates the relation between the space of the individual room and collective spaces (for intellectual and domestic labor), plus other collective spaces related to education and knowledge (lifelong learning), essential for how these 'eternal-students' work (or are attending to enter the world of cognitive jobs). Oxford and Cambridge medieval Colleges, Jeffersonian campuses, 20s American Residential Hotels and soviet Dom-Kommunas defines both spatial paradigms of dwelling and different habitus anticipating those of today’s knowledge workers. In this PhD thesis, the organisational models of these paradigmatic experiences are revisited through different categories and spatial types that are still detectible in certain contemporary experiences.
In the theoretical project Long Nights building typologies are adapted to programs of dwelling according to today habitus. Historical examples are interpreted into new prototypes of collective dwellings. Moreover, their application to urban reality could be possible only through the invention and the restructure of a new Welfare model able to provide to every single worker, once away the sphere of his/her parents, and once liberated from the exploitation of precarious labor, always, globally a place to call home
Flatness optimization of micro-injection moulded parts: the case of a PMMA microfluidic component
No full textMicro-injection moulding (µ-IM) has attracted a lot of interest because of its potential for the production of low-cost, miniaturized parts in high-volume. Applications of this technology are, amongst others, microfluidic components for lab-on-a-chip devices and micro-optical components. In both cases, the control of the part flatness is a key aspect to maintaining the component's functionality. The objective of this work is to determine the factors affecting the flatness of a polymer part manufactured by µ-IM and to control the manufacturing process with the aim of minimizing the in-process part deformation. As a case study, a PMMA microfluidic substrate with overall dimensions of 10 mm diameter and 1 mm thickness was investigated by designing a µ-IM experiment having flatness as the experimental response. The part flatness was measured using a micro-coordinate measuring machine. Finite elements analysis was also carried out to study the optimal ejection pin configuration. The results of this work show that the control of the µ-IM process conditions can improve the flatness of the polymer part up to about 15 µm. Part flatness as low as 4 µm can be achieved by modifying the design of the ejection system according to suggested guideline
On the attainable set for scalar balance laws with distributed control
No full textThe paper deals with the set of attainable profiles of a solution u to a scalar balance law
in one space dimension with strictly convex flux function
∂tu + ∂xf(u) = z(t, x).
Here the function z is regarded as a bounded measurable control. We are
interested in studying the set of attainable profiles at a fixed time T > 0, both in case
z(t,·) is supported in the all real
line, and in case z(t,·) is supported in a compact
interval [a, b] independent on the time variable t
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