Using a <670> zone axis for convergent beam electron diffraction measurements of lattice strain in strained silicon

Convergent beam electron diffraction patterns of silicon from the gate channel region of a complementary metal‐oxide‐semiconductor transistor with recessed Si_.82Ge_.18 stressors were analysed using three zone axes: <230>, <340> and <670>. Values measured using these axes were compared with each other with regards to strain along the [] and the [001] directions. It was demonstrated that strain measurements made using all three axes showed reasonable agreement with each other: an increase in the [] compressive strain and a switch from compressive to tensile strain in the [001] with decreasing distance below the gate. It was also observed that the strain calculations using the <230> axis had the lowest uncertainty whereas the <670> axis allowed for measurements closest to the gate due to the improved lateral resolution at that tilt angle.     

Institutions, Inertia and Changing Industrial Leadership

Major technological transformations may lead to the demise ofhitherto successful business institutions and their replacementby new institutions whose characteristics are more suitableto the changed conditions. Because new technologies are slowto spread, however, then may be prolonged periods in which boththe new and old institutions coexist. We argue that the transformationfrom one set of institutions to another may often be based ona mechanism incorporating learning and other experience effects.     

THE STORAGE LIFE OF FRUITS AND VEGETABLES

Exponential curves have been fitted to published temperature/time/quality data for both fresh and frozen fruits and vegetables. The two constants in the exponential equation are used as measures of the relative storage life of the product and of its sensitivity to temperature change. Of these 2 constants, 1 is analogous to the “Q₁₀” value often used to express temperature sensitivity, but it is independent of actual temperature. The two constants are used to provide an index of “storability” of different fruits and vegetables and a tentative classification of produce according to this “storability” is presented. Fitting curves to temperature/time/quality data also allows prediction of the effects on storage life of fluctuating product temperatures, such as are experienced during normal transport and storage.     

基于本土主义的设计

Looking to Globally Important Agricultural Heritage Systems (GIAHS) sites and traditional ecological knowledge-based infrastructures (Lo–TEK), we find nature-based systems that symbiotically work with the environment. This article suggests that by hybridizing Lo–TEK with high-tech systems, the GIAHS sites could offer designers a toolkit towards economically, ecologically, culturally, and technologically innovative systems that can improve productivity and resilience. Whereas urban development results in the erasure of history, identity, culture and nature, this idea explores how urbanization can be an agent for the migration and reapplication of agricultural heritage systems, rather than their greatest threat. Cities can leap-frog the typical Western model of displacing indigenous diversity for homogenous high-tech. Instead, catalyzing localized, agricultural heritage landscapes like those designated as globally important agricultural heritage systems, as scalable, productive and resilient climate change solutions and technologies. It requires a shift in the thinking about traditional agriculture and about the relationship to Nature, from superior to symbiotic.     

INCIDENCE OF CAMPYLOBACTER IN PROCESSED POULTRY: IS IT A CONCERN FOR HUMAN HEALTH?

In Australia, over 15,000 cases of campylobacteriosis occur annually; however, recent findings from case-control studies suggest that poultry may not be the primary etiological agent. To determine the incidence of Campylobacter species on Australian poultry, a qualitative and quantitative survey of different poultry products was undertaken. The qualitative study examined 428 poultry carcasses from 42 processors. Overall, 93.7% of the carcasses were found to be positive for Campylobacter species, of which 84.1% were identified as Campylobacter jejuni by hippurate hydrolysis, and 9.6% as other Campylobacter species. A longitudinal study over 6 weeks on 27 broiler carcasses from a single processor found an average Campylobacter species count of 163 cfu/cm², with a range of 5–1,850 cfu/cm² excluding one carcass that was negative. The real health risk of this carriage, however, cannot be determined accurately without further investigation of the presence of virulence factors and more accurate species identification.

PRACTICAL APPLICATIONS

This article identifies that the incidence of Campylobacter species on processed poultry remains at levels recognized to be potentially infectious to humans. This suggests that current changes in processing control in the Australian poultry industry primarily established for Salmonella species may not necessarily reduce all potential human pathogens to safe levels.
Using current literature, this article also debates whether the simple identification of presence and absence of a particular pathogen is sufficient for assumptions to be drawn on risk of infection. The discussion questions the real role of poultry in cases of campylobacteriosis, and suggests that based on case-history data, poultry may be not be the common cause of the disease.