85 research outputs found
Late socialist revolutionary achievements of the township of Filipov: Cahiers du CEFRES N° 30, Le communisme à partir des sociétés - Communism from the viewpoint of societies
No full textInternational audienceFilipov is a township of three thousand, in the border and mostly agricultural county of Dubno, in Eastern Moravia. The author analyses how, though Filipov took a long time to recover from the post-war collapse and the socialist transformation, it gradually became a stable and prosperous municipality in a quiet county where, even as late as 1989, there was almost no indication that some changes in its well established way of life would soon arrive. It seems that when the changes occurred, the people of Filipov successfully passed through the phases of the Revolution (or, more precisely, the transfer of power) in a way that mirrored exactly how changes occurred at the centre. Indeed, it was not until the period 1997 to 1999, when the township was studied, that Filipov was forced to confront a crisis because of overspending on development motivated by the “Construction Spirit”, a legacy from Real Socialism. Kabele therefore asks the question why the people of Filipov completed a “Velvet Revolution” when the town was doing well, and why did it fail
THE EFFECT OF LEVELING AND TERRACING ON THE FIELD WATER CAPACITY OF SOILS FROM SLOPING LAND IN THE NORTH EAST PART OF ROMANIA
No full text
THE EFFECT OF THE DRIP IRRIGATION ON SOIL WITH FINE TEXTURE AND HARDPAN IN PLASTIC TUNNELS FROM NORTH � EAST OF ROMANI
No full textTailoring stiffness of deployable origami structures
No full textEmbargo set by: Seth Robbins for item 98713
Lift date: 2019-03-01T17:03:32Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemOrigami has gained popularity in science and engineering because a compactly stowed system can be folded into a transformable 3D structure with increased functionality. Origami can also be reconfigured and programmed to change shape, function, and mechanical properties. In this thesis, we explore origami from structural and stiffness perspectives, and in particular we study how geometry affects origami behavior and characteristics. Understanding origami from a structural standpoint can allow for conceptualizing and designing feasible applications in all scales and disciplines of engineering.
We improve, verify, and test a bar and hinge model that can analyze the elastic stiffness, and estimate deformed shapes of origami. The model simulates three distinct behaviors: stretching and shearing of thin sheet panels; bending of the flat panels; and bending along prescribed fold lines. We explore the influence of panel geometry on origami stiffness, and provide a study on fold line stiffness characteristics. The model formulation incorporates material characteristics and provides scalable, and isotopic behavior. It is useful for practical problems such as optimization and parametrization of geometric origami variations.
We explore the stiffness of tubular origami structures based on the Miura-ori folding pattern. A unique orientation for zipper coupling of rigidly foldable origami tubes substantially increases stiffness in higher order modes and permits only one flexible motion through which the structure can deploy. Deployment is permitted by localized bending along folds lines, however other deformations are over-constrained and engage the origami sheets in tension and compression. Furthermore, we couple compatible origami tubes into a variety of cellular assemblages that can enhance mechanical characteristics and geometric versatility. Practical applications such as deployable slabs, roofs, and arches are also explored.
Finally, we introduce origami tubes with polygonal cross-sections that can reconfigure into numerous geometries. The tubular structures satisfy the mathematical definitions for flat and rigid foldability, meaning that they can fully unfold from a flattened state with deformations occurring only at the fold lines. From a global viewpoint, the tubes do not need to be straight, and can be constructed to follow a non-linear curved line when deployed. From a local viewpoint, their cross-sections and kinematics can be reprogrammed by changing the direction of folding at some folds.Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2018-12-01The student, Evgueni Filipov, accepted the attached license on 2016-11-30 at 15:41.The student, Evgueni Filipov, submitted this Dissertation for approval on 2016-11-30 at 15:54.This Dissertation was approved for publication on 2016-12-01 at 14:38.DSpace SAF Submission Ingestion Package generated from Vireo submission #10379 on 2017-02-28 at 14:42:29Made available in DSpace on 2017-03-01T17:01:48Z (GMT). No. of bitstreams: 3
FILIPOV-DISSERTATION-2016.pdf: 51748947 bytes, checksum: 11bb5abe5892340b0bbfbe4981b2c257 (MD5)
LICENSE.txt: 4212 bytes, checksum: 15ed6a7557b418c673ca3e9ad34dc8ae (MD5)
PROQUEST_LICENSE.txt: 4558 bytes, checksum: c4e5a9e4fb624f436505153ef7796d0a (MD5)
Previous issue date: 2016-12-01Embargo set by: Seth Robbins for item 98713
Lift date: 2019-03-01T17:02:22Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 98713
Lift date: 2019-03-01T17:05:02Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 98713
Lift date: 2019-03-01T17:06:55Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemLimited Restriction Lifted for Item 98713 on 2019-03-02T10:15:33Z
Issues related to the use of land on which drying-drainage systems are built
No full textThe draining-drainage systems carried out for eliminating the excessive humidity on agricultural lands were designed
with respect to the exploitation of surfaces on the draining sectors. Since upon the construction and reconstruction of
property rights the orientation of the absorbent drainage lines and drying network was not considered, the plots of land
are either perpendicular on, or parallel to, or even form an acute angle with these absorbent drains and/or drying canals.
The different soil works performed on each individual plot has led, in time, to the formation of ridged strips of variable
widths, level differences and transverse slopes, depending on the width of the plots, on the manner in which they are
used and on the machinery employed for the agricultural works conducted. The land shaping in ridge straps and their
different orientation of to the drain lines and the channel network leads to a non uniform elimination of the water excess
on the drained land. On the arable drained land surfaces with individual parcels orientated along the level curves, the
land shaping in ridge straps produced water stagnation on drains and the accentuation of excessive humidity especially
in spring and raining seasons which lead to the gradual passing of the parcel to a lower category of use, that is
grasslands. Non-ridged plots enjoy better excessive water removal, which enables farmers to perform adequate and
timely spring works and thus have better agricultural productions. The draining-drainage systems carried out for
eliminating the excessive humidity on agricultural lands were designed with respect to the exploitation of surfaces on
the draining sectors
Issues related to the use of land on which drying-drainage systems are built
No full textThe draining-drainage systems carried out for eliminating the excessive humidity on agricultural lands were designed
with respect to the exploitation of surfaces on the draining sectors. Since upon the construction and reconstruction of
property rights the orientation of the absorbent drainage lines and drying network was not considered, the plots of land
are either perpendicular on, or parallel to, or even form an acute angle with these absorbent drains and/or drying canals.
The different soil works performed on each individual plot has led, in time, to the formation of ridged strips of variable
widths, level differences and transverse slopes, depending on the width of the plots, on the manner in which they are
used and on the machinery employed for the agricultural works conducted. The land shaping in ridge straps and their
different orientation of to the drain lines and the channel network leads to a non uniform elimination of the water excess
on the drained land. On the arable drained land surfaces with individual parcels orientated along the level curves, the
land shaping in ridge straps produced water stagnation on drains and the accentuation of excessive humidity especially
in spring and raining seasons which lead to the gradual passing of the parcel to a lower category of use, that is
grasslands. Non-ridged plots enjoy better excessive water removal, which enables farmers to perform adequate and
timely spring works and thus have better agricultural productions. The draining-drainage systems carried out for
eliminating the excessive humidity on agricultural lands were designed with respect to the exploitation of surfaces on
the draining sectors
Land suitability of Comarna cathement basin for cherries trees
No full textThe land suitability for cherries orchard represent the extent to which soil satisfy requirements of Cherry trees, on the
local climatically conditions and within the framework of a management adapted to adapted to this species. Land with
optimal suitability for cherry plantations are located in areas with average annual temperatures of 20 years, 8 ÷ 11°C,
the average temperature of May are between 14 and 16°C, the absolute minimum annual air temperature does not drop
abruptly as -20°C), and if it decreases gradually does not fall below (-28°C). In Romania, cherry trees grow well on a
wide range of soil types such as Chromic Luvisols, Phaeozems, Eutric Cambisols, Chernozems and even Kastanozems.
The stagnic, gleyic and stagni-gleyic soils are unsuitible for cherry plantations due to poor drainage. Another optimal
soil characteristics for cherry orchard are: pH values between 5,5-7,2, aeration porozity of 16-22%, calcium carbonate
content lower than 7%. The hyposalic, hyposodic and vertic soils are excluded from the establishment of orchards. We
intend to present a case study of Comarna catchment area. The land of this watershed has good suitability for cherries
orchard due to local microclimate, good external and internal drainage, ensured by middle slope and middle soil texture.
The specific local microclimate is reflected by an earlier ripening cherry, about two weeks compared to neighboring
basins located on the same altitude. Some of the lands are degraded by landslides and have severe restrictions for the
establishment of orchards. The soil are more colder due to high content of clay, high water capacity and land shaded
exhibition
Water distribution in some soils from classical and tunnel-type solariums, irrigated by dripping
No full textDrip irrigation consists in the slow administration of water in the area
of plant root system, for satisfying plant physiological demands and is seen
as a variant of localized watering method. Although the watering method by
dripping is relatively new in Romania, at the beginning, it was used in vine
plantations, but once with the extension of areas occupied with solariums,
this watering method was adopted almost exclusively because of the many
advantages it has.
As a result of applying water by dripping, a wet area was formed in
the next proximity of dripper that may have different shapes according to soil
characteristics and dimensional elements of the watering equipment.
According to the used watering technique and equipment, soil wetting
has the shape of some strips with different lengths and depths and variable
values of water content from soil on the areas of solarium (centre, ends). In
the classical-type solarium, soil moisture is influenced by water infiltrated
from outside that resulted from rainfall
- …
