Gasification of rubberwood in a downdraft gasifier

The objectives of this research were to investigate the perforamnce of a rubberwood gasifier and engine with electricity generation and to identify opportunities for the implementation of such a system in Malaysia. The experimental work included the design, fabrication and commissioning of a throated downdraft gasifier in Malaysia. The gasifier was subsequently used to investigate the effect of moisture content, dry wood capacity and particle size of rubberwood on gasifier performance. Additional experiments were also conducted to investigate the influence of two different nozzle numbers and two different throat diameters on tar cracking. A total of 101 runs were completed during the duration of the research. From the experimental data, the average mass balance was found to be 92.65%. The average energy balance over the gasifier to hot raw gas was 98.7%, to cold clean gas was 102.4% and over the complete system was 101.9%. The heat loss from the gasifier was estimated to range from 10-26% of the chemical energy of the feedstock. From the downstream operation, the heat loss was estimated to range from 17-37% of the chemical energy of rubberwood feedstock. The maximum throughput for stable operation was found to be 60-70% of the maximum dry wood capacity. The gasifier was found to have a maximum turndown ratio of 5:1. It is also postulated that the phenomenon of turndown of the gasifier is due to a `bubble theory' occurring at the gasification zone, and this hypothesis is explained. For stable power output, the working range of the engine was found to be 5-33.5 kWe. The thermal efficiency and diesel displacement of the engine was found to be 17-18% and 65-70% respectively. The research also showed that rubberwood gasification in Malaysia is feasible if the price of diesel is above MR35/l and the price of wood is below MR120/tonne.

Neuro-electromagnetic imaging of the human visual cortex

Methods of solving the neuro-electromagnetic inverse problem are examined and developed, with specific reference to the human visual cortex. The anatomy, physiology and function of the human visual system are first reviewed. Mechanisms by which the visual cortex gives rise to external electric and magnetic fields are then discussed, and the forward problem is described mathematically for the case of an isotropic, piecewise homogeneous volume conductor, and then for an anisotropic, concentric, spherical volume conductor. Methods of solving the inverse problem are reviewed, before a new technique is presented. This technique combines prior anatomical information gained from stereotaxic studies, with a probabilistic distributed-source algorithm to yield accurate, realistic inverse solutions. The solution accuracy is enhanced by using both visual evoked electric and magnetic responses simultaneously. The numerical algorithm is then modified to perform equivalent current dipole fitting and minimum norm estimation, and these three techniques are implemented on a transputer array for fast computation. Due to the linear nature of the techniques, they can be executed on up to 22 transputers with close to linear speedup. The latter part of the thesis describes the application of the inverse methods to the analysis of visual evoked electric and magnetic responses. The CIIm peak of the pattern onset evoked magnetic response is deduced to be a product of current flowing away from the surface areas 17, 18 and 19, while the pattern reversal P100m response originates in the same areas, but from oppositely directed current. Cortical retinotopy is examined using sectorial stimuli, the CI and CIm ;peaks of the pattern onset electric and magnetic responses are found to originate from areas V1 and V2 simultaneously, and they therefore do not conform to a simple cruciform model of primary visual cortex.

Location and ages of terrestrial peatlands located on continental shelves and in coastal sediments

This synthesis dataset contains records of freshwater peat and lake sediments from continental shelves and coastal areas. Information included is site location (when available), thickness and description of terrestrial sediments as well as underlying and overlying sediments, dates (when available), and references.

Conflicting expectations in transforming government service processes: the story of e-payment for social welfare in Ireland

Despite its clear potential and attractiveness as a solution to a broad range of societal problems, E-Government has not been adopted to levels predicted in early 2000 literature. Whilst case studies of punctual development of E-Government initiatives abound, few countries have progressed to high levels of maturity in the systematic use of ICT in the relationship between government and citizens. At the same time, the current period brings challenges in terms of access to public services and costs of delivering these services which make the large scale use of ICT by governments more attractive than ever, if not even a necessity. This paper presents a detailed case study of a specific E-Government initiative in Ireland in the area of E-payments for G2C, in the social welfare area. Locating the current initiative in its historical context, it analyses the varied motivations and conflicting requirements of the numerous stakeholders and discusses the constraints that bear on the potential scenarios that could be followed at this point in time.

Seasonal variations in surface metabolite composition of Fucus vesiculosus and Fucus serratus sampled at outer Kiel Fjord (August 2012 - July 2013)

The chemical composition of surface associated metabolites of two Fucus species (Fucus vesiculosus and Fucus serratus) was analysed by means of gas chromatography-mass spectrometry (GC-MS) to describe temporal patterns in chemical surface composition. Method: The two perennial brown macroalgae F. vesiculosus and F. serratus were sampled monthly at Bülk, outer Kiel Fjord, Germany (54°27'21 N / 10°11'57 E) over an entire year (August 2012 - July 2013). Per month and species six non-fertile Fucus individuals were collected from mixed stands at a depth of 0.5 m under mid water level. For surface extraction approx. 50 g of the upper 5-10 cm apical thalli tips were cut off per species. The surface extraction of Fucus was performed according to the protocol of de Nys and co-workers (1998) with minor modifications (see Rickert et al. 2015). GC/EI-MS measurements were performed with a Waters GCT premier (Waters, Manchester, UK) coupled to an Agilent 6890N GC equipped with a DB-5 ms 30 m column (0.25 mm internal diameter, 0.25 mM film thickness, Agilent, USA). The inlet temperature was maintained at 250°C and samples were injected in split 10 mode. He carrier gas flow was adjusted to 1 ml min-1. Alkanes were used for referencing of retention times. For further details (GC-MS sample preparation and analysis) see the related publication (Rickert et al. submitted to PLOS ONE).

Pollen data and pollen-based climate reconstruction for the KTK1 pollen record from Lake Kotokel

In this study a radiocarbon-dated pollen record from Lake Kotokel (52°47' N, 108°07' E, 458 m a.s.l.) located in southern Siberia east of Lake Baikal was used to derive quantitative characteristics of regional vegetation and climate from about 15 kyr BP (1 kyr = 1000 cal. yr) until today. Quantitative reconstruction of the late glacial vegetation and climate dynamics suggests that open steppe and tundra communities predominated in the study area prior to ca. 13.5 kyr BP and again during the Younger Dryas interval, between 12.8 and 11.6 kyr BP. The pollen-based climate reconstruction suggests lower-than-present mean January (~ -38 °C) and July (~ 12 °C) temperatures and annual precipitation (~ 270-300 mm) values during these time intervals. Boreal woodland replaced the primarily open landscape around Kotokel three times at about 14.8-14.7 kyr BP, during the Allerød Interstadial between 13.3-12.8 kyr BP and with the onset of the Holocene interglacial between 11.5 and 10.5 kyr BP, presumably in response to a noticeable increase in precipitation, and in July and January temperatures. The maximal spread of the boreal forest (taiga) communities in the region is associated with a warmer and wetter-than-present climate (Tw ~ 17-18 °C, Tc ~ -19 °C, Pann ~ 500-550 mm) that occurred ca. 10.8-7.3 kyr BP. During this time interval woody vegetation covered more than 50 % of the area within a 21x21 km window around the lake. The pollen-based best modern analogue reconstruction suggests a decrease in woody cover percentages and in all climatic variables about 7-6.5 kyr BP. Our results demonstrate a gradual decrease in precipitation and mean January temperature towards their present-day values in the region around Lake Kotokel since that time.

Thyroid hormone and gland status of Greenland sledge dogs (Canis lupus familiaris) exposed to contaminated blubber

As a model of high trophic level carnivores, sledge dogs were fed from 2 to 18 months of age with minke whale blubber containing organohalogen compounds (OHC) corresponding to 128 µg PCB/day. Controls were fed uncontaminated porcine fat. Thyroid hormone levels were assessed in 7 exposed and 7 control sister bitches (sampled at age 6-18 months) and 4 exposed and 4 control pups, fed the same diet as their mothers (sampled age 3-12 months). Lower free and total T3 and T4 were seen in exposed vs. control bitches beyond 10 months of age, and total T3 was lower through 3-12 months of age in exposed pups. A negative correlation with thyroid gland weight was significant for SumDDT, as was a positive association with total T3 for dieldrin. This study therefore supports observational data that OHCs may adversely affect thyroid functions, and it suggests that OHC exposure duration of 10 months or more may be required for current OHC contamination levels to result in detectable adverse effects on thyroid hormone dynamics.

Nanotechnology in food industry II: risk assessment and legislation

Currently, there is increasing use of nanomaterials in the food industry thanks to the many advantages offered and make the products that contain them more competitive in the market. Their physicochemical properties often differ from those of bulk materials, which require specialized risk assessment. This should cover the risks to the health of workers and consumers as well as possible environmental risks. The risk assessment methods must go updating due to more widespread use of nanomaterials, especially now that are making their way down to consumer products. Today there is no specific legislation for nanomaterials, but there are several european dispositions and regulations that include them. This review gives an overview of the risk assessment and the existing current legislation regarding the use of nanotechnology in the food industry.

Is the cinematic newsreel the strongest weapon? The "Luce" newsreel reception during fascism

The Luce newsreel was a fascist-pivotal propaganda instrument. Mussolini thought movies were the strongestweapon; however, the efficiency of cinematographic propaganda on people did not work as well as expected,especially nonfiction. This article intends to value, through oral testimonies, the influence of Lucenewsreel on the Italian population during fascism, the degree of truth of film news, and which of those piecesof news were more repeated, as well as the influence of the Italian and its leader image on the collective mind.

Del bodegón a la basura. Representaciones de alimentos en la historia del arte desde la perspectiva de la fotografía contemporánea

El artículo habla de la representación de alimentos en la Historia del Arte; estudia porqué las representaciones de comida tradicionalmente han sido consideradas como un género menor y plantea la hipótesis de su revitalización en el mercado del arte contemporáneo a través de la fotografía. Mediante el análisis de imágenes de comida en diferentes épocas, el texto explica que los bodegones casi siempre han sido símbolos de la superabundancia, presentando fundamentalmente alimentos, y en algunas ocasiones desperdicios. Continúa con la idea de que las sobras en las antigüedad eran orgánicas y sin embargo, en la actualidad los still life se han convertido en representaciones de basura, de desechos, y desperdicios en todas sus acepciones. El texto demuestra, mediante el análisis de algunas obras contemporáneas fotográficas, que el tema de la comida hoy es mucho más relevante de lo que la crítica de arte argumentaba en el pasado. Las imágenes de objetos conforman un sistema de representación y significado en continua evolución que es el reflejo de nuestra cultura. Estas fotografías nos hablan de sociología, política y economía mostrándonos en la actualidad el impacto que está sufriendo el medioambiente debido a nuestras rutinas cotidianas.

Indicators on community art practices: some reflections

From the Divercity project, the article reflects on methodology, good practices and indicators useful for community art practices. At first term, social exclusión is defined as well as community art, and which features it presents. Subsequently, the article reviews the indicators that are being used to measure the success or achievement of community arts practice, raising criticism from equality and including indicators that measure the well-being of women.

Terence in the Spanish xviiith century: La Andria by Manuel Dequeisne

After an approach to the translation in Spain during the xviiith century, the purpose of this text is to present the almost unknown version of Terence’s Andria (1786) by M. Dequeisne, written in order to substitute Simon Abril’s one. It consists on the theoretical exposition of the prologue, the issue of the retranslation and the own characteristics of the translation itself, along with a comparison with Simon Abril’s version.

"Mal Nascer", de Carlos Campaniço

Carlos Campaniço lançou em maio um novo romance (que foi finalista do Prémio Leya 2013), demonstrando vitalidade e vontade de prosseguir esta sua já premiada carreira de escritor. Tal como nas obras anteriores – provavelmente por gosto e formação do autor, dado que a história é a sua especialidade –, também este é um romance de época, desta vez passado no início do século XIX: a narrativa acompanha Santiago, um jovem médico, partidário de D. Pedro, que se refugia, durante as Guerras Liberais (1828- 1834), numa vila longe de Lisboa, uma vila que é a terra que o viu (mal) nascer: «Olho a praça com um vagar que é ainda de saudade. Estes recantos e travessas, ruas e largos, continuam a ser os meus passos. (…) é aqui na vila que ouço o tambor do meu coração» (pp. 17-18). Naturalmente, ficamos com curiosidade para saber por que razão de lá saiu e por que se inibe em se fazer reconhecer diretamente pelos seus conterrâneos (apesar de não se esconder – sai da casa, expondo-se à vista de todos –, também não se identifica). Mas o motivo só nos é revelado no final. Até lá, vamos acompanhando, em capítulos intercalados, uns largos meses da vida de Santiago adulto e uns anos da de Santiago menino, de forma a ir construindo, paulatinamente, a sua história. Santiago não é propriamente um herói, um homem de altos padrões morais e de elevada consciência social, que luta e assume a consequência dos seus princípios e crenças. Não. Em Lisboa, Santiago teme pela vida e foge dos miguelistas; na vila, receia assumir quem é («Temo a reacção de Albano e de dona Odélia», p. 16;) e as consequências de ser acusado de herege («Fico aterrado com esta postura súbita do vereador », p. 53); no amor, enreda- -se com duas mulheres casadas e não tem coragem quer para cortar com uma que o persegue, quer para declarar a outra que a ama; e aceita fazer a corte a uma terceira, que não é tida nem achada nestas demandas. Porém, todas estas fragilidades fazem-no parecer mais humano. Ao mostrar a infância sofrida de Santiago, durante a qual foi maltratado, exilado e até, pode-se afirmar, sequestrado, Carlos Campaniço consegue fazer-nos simpatizar e empatizar com as suas fraquezas de adulto e até admirar a compaixão que ainda tem dentro de si, depois de tudo o que se passou (as lágrimas chegam- lhe facilmente aos olhos, quando perante a miséria humana e a doença).

Adubação orgânica no PDS Nova Esperança, Iranduba, AM: uso para a recuperação do solo.

Agricultores usam insumos orgânicos em suas propriedades para compostagem. Foram identificados qualitativamente os componentes utilizados e quantitativamente os nutrientes, nas diferentes pilhas de composto, por meio de um Estudo de Caso com as ferramentas: a) entrevistas abertas e questionários; b) levantamento dos materiais; c) coleta de amostras do composto formado para a análise química dos nutrientes em laboratório.