A microcomputer based system for small‐scale geophysical surveys

Geophysics ◽  
1984 ◽  
Vol 49 (2) ◽  
pp. 189-193 ◽  
Author(s):  
W. T. C. Sowerbutts ◽  
R. W. I. Mason

Manufacturers of geophysical instruments have kept abreast of the many developments in microelectronics that have taken place in the last decade, and have made important developments in geophysical instrumentation. The instruments they have produced are not only smaller and more robust than their predecessors, but are easier to operate, produce a quicker response, and often perform additional functions.

Author(s):  
Connor J. Fitzmaurice ◽  
Brian J. Gareau

Without abandoning the practical idea of farming as a business, the small-scale farmers in this book foster connections between consumer experiences and expectations and farming practices that support their visions of organic. They try to build new, alternative markets to challenge the watering down of “organic” that the full-force entrance of corporate market logics ushered in. However, there are limitations to how sustainable such farming operations can be without further changing the relationships the modern food system is based upon. This chapter begins by recognizing the many limitations of localism, including the potentially neoliberal aspects of such efforts. However, the neoliberal notion that individuals can and should bring forth their own interests and engage in political contestation could (paradoxically) be the very kernel that further popularizes small-scale food production networks that provide safer, more healthful food and a better sense of community than the isolating conventional shopping experience. Finally, the chapter considers how deepening consumer involvement in the process of agriculture, incorporating concerns about social justice into local food systems, and addressing the inefficiencies of decentralized food production could push local agriculture to be even more alternative.


2018 ◽  
Vol 33 (2) ◽  
pp. 96
Author(s):  
Elpawati Elpawati ◽  
Achmad Tjachja Nugraha ◽  
Ratu Shofiatina

<p>Indonesia poultry consumption has increased year by year, with the average positive growth rate of 4.6%. This situation can be a chance for both small and large scales of poultry farmers, considering that poultry consumption is increasing every year. The rate of poultry production in Gunung Sindur was correlated with the amount of the existing poultry farms. Romli Farm was a small scale poultry farm in Gunung Sindur, Bogor. This poultry farm, with no partnership, could independently survive amongst the many other existing farms. However, although the opportunities were wide open, this business was not always viable for the farmers because many of small-scale farmers could not be able either to increase the income or to carry on the business. This research aimed to study the income, financial feasibility (NPV, IRR, Net B/C Ratio, and PP), the BEP of Selling Price, and the BEP of Product in Romli Farm.</p>


2019 ◽  
Vol 18 (3) ◽  
pp. 241-248 ◽  
Author(s):  
Katia Frangoudes ◽  
Siri Gerrard ◽  
Danika Kleiber

AbstractThe need to uncover, interrogate, and integrate women’s contributions to fisheries in research and development has never been clearer. As coastal and fisheries management continues to look to the Sustainable Development Goals and the Voluntary Guidelines for Securing Sustainable Small-Scale Fisheries in the context of Food Security and Poverty Eradication, as frameworks and mandates, gender equity and equality have become a central concern. To fill the still existing gap of documentation and theoretical engagement, in this thematic collection, we gather together voices from researchers and practitioners from around the world, with one overarching common approach of using a gender lens to examine the relationship between humans and aquatic resources. Drawing on Donna Haraway’s classic feminist concept of situated knowledges, we examine the many and varied approaches researchers are using to engage with the intersection of gender and fisheries. Beginning and ending with two reviews that examine where gender and fisheries has come from, and where it is going, this thematic issue includes case studies from 10 countries, engaging in the topic at various scales (individual, household, national, institutional etc.), and using multiple methodological approaches. Taken together, these pieces explore the mechanism by which women’s contribution to fisheries are overlooked and provide direct evidence to contest the persistent invisibility of women in fishing, fisheries labor, and fisheries decision-making. Going beyond the evidence of women’s contributions, the authors go further to examine different coastal contexts, intersectional identities such as age, and explore gender transformative approaches to fisheries development.


Geophysics ◽  
1950 ◽  
Vol 15 (4) ◽  
pp. 704-731
Author(s):  
G. Dessau

The methods used and some results obtained from geophysical investigations conducted by the Geophysical Section of the Geological Survey of India from 1945–1948 are presented. The many difficulties encountered in obtaining the proper instruments necessitated the widespread use of equipment made by the Section. This is one of the reasons why electrical resistivity and spontaneous polarization methods were employed in preference to others. The majority of the geophysical surveys during this three year period were concentrated in the search for minerals, water supplies, and in the solution of foundation engineering problems. The emphasis on these phases of geophysical prospecting rather than on oil surveys was necessary because, of the types of equipment available, as well as the priority assigned to these projects. Two spontaneous polarization, two magnetic, and two resistivity surveys are described, in addition to one carried out jointly by electrical and seismic methods. The geological background of these investigations are also briefly mentioned together with some details of the equipment used.


Slavic Review ◽  
1987 ◽  
Vol 46 (2) ◽  
pp. 245-265 ◽  
Author(s):  
Theodore H. Friedgut

Recent monographs on Russian social development have raised a number of hypotheses regarding our general understanding of processes of political and social change. In his volume on the early history of Russian workers Reginald Zelnik, for instance, proposes that moderate labor unrest reinforced traditional repressive patterns, while extreme conflicts motivated innovative reform. In the work of Robert E. Johnson and of Victoria Bonnell we find the suggestion that workers in small-scale enterprises and artisan shops were often more radical and organized than those in larger industrial enterprises. The fragmented and antagonistic nature of Russian society, with multiple splits of both an intergroup and intragroup nature, has been noted in the work of both Roberta Manning and Allan Wildman. Diane Koenker, focusing her research on the period of the 1917 revolutions, has brought out the moderating and integrating effect of the urban setting on Russian workers. These are only a few of the many thought-provoking hypotheses that have been raised.


Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1468
Author(s):  
Mostafa Rezaei ◽  
Udaya Dampage ◽  
Barun K. Das ◽  
Omaima Nasif ◽  
Piotr F. Borowski ◽  
...  

One of the many barriers to decarbonization and decentralization of the energy sector in developing countries is the economic uncertainty. As such, this study scrutinizes economics of three grid-independent hybrid renewable-based systems proposed to co-generate electricity and heat for a small-scale load. Accordingly, the under-study systems are simulated and optimized with the aid of HOMER Pro software. Here, a 20-year average value of discount and inflation rates is deemed a benchmark case. The techno-economic-environmental and reliability results suggest a standalone solar/wind/electrolyzer/hydrogen-based fuel cell integrated with a hydrogen-based boiler system is the best alternative. Moreover, to ascertain the impact of economic uncertainty on optimal unit sizing of the nominated model, the fluctuations of the nominal discount rate and inflation, respectively, constitute within the range of 15–20% and 10–26%. The findings of economic uncertainty analysis imply that total net present cost (TNPC) fluctuates around the benchmark value symmetrically between $478,704 and $814,905. Levelized energy cost varies from an amount 69% less than the benchmark value up to two-fold of that. Furthermore, photovoltaic (PV) optimal size starts from a value 23% less than the benchmark case and rises up to 55% more. The corresponding figures for wind turbine (WT) are, respectively, 21% and 29%. Eventually, several practical policies are introduced to cope with economic uncertainty.


Author(s):  
Macaulie A Casey ◽  
Jonathon T Hill ◽  
Kazuyuki Hoshijima ◽  
Chase D Bryan ◽  
Suzanna L Gribble ◽  
...  

Abstract Morphogenesis, the formation of three-dimensional organ structures, requires precise coupling of genetic regulation and complex cell behaviors. The genetic networks governing many morphogenetic systems, including that of the embryonic eye, are poorly understood. In zebrafish, several forward genetic screens have sought to identify factors regulating eye development. These screens often look for eye defects at stages after the optic cup is formed and when retinal neurogenesis is under way. This approach can make it difficult to identify mutants specific for morphogenesis, as opposed to neurogenesis. To this end, we carried out a forward genetic, small-scale haploid mutagenesis screen in zebrafish (Danio rerio) to identify factors that govern optic cup morphogenesis. We screened ∼100 genomes and isolated shutdown corner (sco), a mutant which exhibits multiple tissue defects and harbors a ∼10 Mb deletion that encompasses 89 annotated genes. Using a combination of live imaging and antibody staining, we found cell proliferation, cell death, and tissue patterning defects in the sco optic cup. We also observed other phenotypes, including paralysis, neuromuscular defects, and ocular vasculature defects. To date, the largest deletion mutants reported in zebrafish are engineered using CRISPR-Cas9 and are less than 300 kb. Because of the number of genes within the deletion interval, shutdown corner (Df(Chr05:sco)z207) could be a useful resource to the zebrafish community, as it may be helpful for gene mapping, understanding genetic interactions, or for study of the many genes lost in the mutant.


Author(s):  
Julia Zoraida Posada Ortiz

In this article I will summarize a small scale project carried out at a private university in Bogotá, with eight undergraduate students. The project aimed at finding out what their oral discourse informed me about their beliefs regarding gender and ethnicity. It also had two other purposes: First, to give the students the opportunity to reflect upon the complexity of the world we live in and the many perspectives involved in this complexity and second, to make students active participants in a democratic society. To achieve these goals a selection of texts written by non-canonical, female and Afro-American writers was given to the students. I conducted five informal interviews, which were audio-taped. The analysis of the responses given by the students showed that there is an internalisation of the values which characterises the Western society we live in. A society ruled by dichotomies such as male/female, white/black and rich/poor, who perpetuatepower relations that favor certain groups over others.The students became active participants by becoming more critical and making decisions about how to improve further editions of the textbook they currently use and suggesting the editors to create a more inclusive book.


2020 ◽  
Vol 14 (10) ◽  
pp. 3287-3308
Author(s):  
Michael Studinger ◽  
Brooke C. Medley ◽  
Kelly M. Brunt ◽  
Kimberly A. Casey ◽  
Nathan T. Kurtz ◽  
...  

Abstract. We use repeat high-resolution airborne geophysical data consisting of laser altimetry, snow, and Ku-band radar and optical imagery acquired in 2014, 2016, and 2017 to analyze the spatial and temporal variability in surface roughness, slope, wind deposition, and snow accumulation at 88∘ S, an elevation bias validation site for ICESat-2 and potential validation site for CryoSat-2. We find significant small-scale variability (<10 km) in snow accumulation based on the snow radar subsurface stratigraphy, indicating areas of strong wind redistribution are prevalent at 88∘ S. In general, highs in snow accumulation rate correspond with topographic lows, resulting in a negative correlation coefficient of r2=-0.32 between accumulation rate and MSWD (mean slope in the mean wind direction). This relationship is strongest in areas where the dominant wind direction is parallel to the survey profile, which is expected as the geophysical surveys only capture a two-dimensional cross section of snow redistribution. Variability in snow accumulation appears to correlate with variability in MSWD. The correlation coefficient between the standard deviations of accumulation rate and MSWD is r2=0.48, indicating a stronger link between the standard deviations than the actual parameters. Our analysis shows that there is no simple relationship between surface slope, wind direction, and snow accumulation rates for the overall survey area. We find high variability in surface roughness derived from laser altimetry measurements on length scales smaller than 10 km, sometimes with very distinct and sharp transitions. Some areas also show significant temporal variability over the course of the 3 survey years. Ultimately, there is no statistically significant slope-independent relationship between surface roughness and accumulation rates within our survey area. The observed correspondence between the small-scale temporal and spatial variability in surface roughness and backscatter, as evidenced by Ku-band radar signal strength retrievals, will make it difficult to develop elevation bias corrections for radar altimeter retrieval algorithms.


1995 ◽  
Vol 1 (6) ◽  
pp. 176-183 ◽  
Author(s):  
Mike Hobbs

Natural disasters occur infrequently in Europe, but the spate of transportation, crowd and other disasters in the late 1980s challenged our collective denial of potential catastrophe. Greater attention is now given also to the frequent small-scale traumatic events which are just as devastating to the many people affected by them, such as violent assaults and road accidents.


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