Water transfer from São Francisco river to semiarid northeast of Brazil: technical data, environmental impacts, survey of opinion about the amount to be transferred

The transposition of the São Francisco River is considered one of the greatest engineering works in Brazil of all time since it will cross an extensive agricultural region of continental dimensions, involving environmental impacts, water, soil, irrigation, water payment and other multidisciplinary themes. Taking into account its importance, this subject was incorporated into a discipline of UFSCar (Federal University of São Carlos - Brazil) named "Pollution and Environmental Impacts". It was noted strong reaction against the project, even before the presentation. To allow a critical analysis, the first objective was to compile the main technical data and environmental impacts. The second objective was to detect the three most important aspects that cause reaction, concluding for the following reasons: assumption that the volume of water to be transferred was much greater than it actually is proposed in the project; lack of knowledge about similar project already done in Brazil; the idea that the artificial canal to be built was much broader than that proposed by the project. The participants' opinion about "volume to be transferred" was raised quantitatively four times: 2-undergraduate students; 1-graduate; 1-outside community. The average resulted 14 times larger than that proposed in the project, significant according to t-test. It was concluded that the reaction to water transfer project is due in part to the ignorance combined with a preconceived idea that tend to overestimate the magnitude of environmental impacts.

Mathematical modeling applied to the growth of tilapia in net cages in the sub middle of the São Francisco river

This study aimed to apply mathematical models to the growth of Nile tilapia (Oreochromis niloticus) reared in net cages in the lower São Francisco basin and choose the model(s) that best represents the conditions of rearing for the region. Nonlinear models of Brody, Bertalanffy, Logistic, Gompertz, and Richards were tested. The models were adjusted to the series of weight for age according to the methods of Gauss, Newton, Gradiente and Marquardt. It was used the procedure "NLIN" of the System SAS® (2003) to obtain estimates of the parameters from the available data. The best adjustment of the data were performed by the Bertalanffy, Gompertz and Logistic models which are equivalent to explain the growth of the animals up to 270 days of rearing. From the commercial point of view, it is recommended that commercialization of tilapia from at least 600 g, which is estimated in the Bertalanffy, Gompertz and Logistic models for creating over 183, 181 and 184 days, and up to 1 Kg of mass , it is suggested the suspension of the rearing up to 244, 244 and 243 days, respectively.

Internal ambience of beehives Apis mellifera with different colors and roofing materials in the sub middle of the São Francisco Valley

ABSTRACTThe current study aimed to evaluate the influence of three colors and two types of roofing materials under the internal temperature of bee colonies Apis mellifera. The experiment was conducted at the Agricultural Sciences Campus at the Federal University of Sao Francisco Valley located in Petrolina-PE, in November and December 2013, using 24 colonies housed in Langstroth hives. The experiment was a completely randomized factorial design (3x2) with three colors of box (blue, white, and traditional) and two types of cover (with and without the use of plaster) with six treatments and four replications. The internal temperature dates of the colonies were hourly recorded, during 24 hours, and surface temperatures were hourly recorded between 08h00 and 17h00. The highest values for surface and internal temperature were registered in the blue painted boxes without the use of plasterboard, and the blue painted boxes covered with plasterboard respectively. However, the lowest values ​​were found in the white painted hives and hives that have not received the plasterboard. It is recommended to paint boxes with bright colors, and the use of plasterboard had no effect in reducing the internal temperature.

Olympialaiskarsinta 1936 II:nen "Siuntionajo" propaganda-kilpailu 21.6.-36

kuv., 14 x 22 cm

Suomen pyöräilymestaruuskilpailut Turussa heinäkuun 4-5 p:nä 1936

14 x 22 cm

Kansalliset rata- ja maantiepyöräilykilpailut Helatorstaina 21.5.1936 3:s Myllymäen-ajo

14 x 21 cm

Kansalliset pyöräilykilpailut PU:n ajo 1 p:nä kesäkuuta 1936 Porvoossa

14 x 22 cm

Turun ratsastuskoulu ohjelma ratsastuskilpailuissa Porissa syysk. 12 ja 13 p:nä 1936

15 x 22 cm

Suomen Pyöräilyliiton tiedote liiton toiminnasta kuluneena vuonna 1936

21 x 28 cm

Kansalliset pyöräily- ja yleisurheilukilpailut Kouvolan urheilukentällä heinäkuun 12 päivänä 1936

14 x 22 cm

Ohjelma Suomen Kenttäratsastusseuran 25-vuotisjuhlakilpailuissa Helsingissä Kaartin maneesissa 18-19 p:nä tammikuuta 1936

17 x 24 cm

Ohjelma ratsastuskilpailuissa toukokuun 23 ja 24 päivänä 1936 Hämeenlinnan Poltinahon kentällä

18 x 28 cm

Ohjelma ratsastuskilpailuissa Kouvolassa 29 ja 30.8.1936

13 x 21 cm

Ratsastuskilpailut Helsingissä syksyllä 1936

14 x 22 cm