scholarly journals Development of a Tuber Planter to Plant and Push Down Sweetpotato Seed Tubers

2021 ◽  
Vol 56 (2) ◽  
pp. 103-109
Author(s):  
Kentaro MATSUO ◽  
Takanori ISHII
Keyword(s):  
Seed Tubers ◽  
Push Down

Age of potato seed-tubers influences protein synthesis during sprouting

1993 ◽  
Vol 89 (2) ◽  
pp. 262-270 ◽  
Author(s):  
G. N. Mohan Kumar ◽  
N. Richard Knowles
Keyword(s):  
Protein Synthesis ◽  
Potato Seed ◽  
Seed Tubers

scholarly journals Investigation of Diagonal Strut Actions in Masonry-Infilled Reinforced Concrete Frames

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Seung-Jae Lee ◽  
Tae-Sung Eom ◽  
Eunjong Yu
Keyword(s):  
Reinforced Concrete ◽  
Failure Mode ◽  
Yield Criterion ◽  
Friction Angle ◽  
Concrete Frames ◽  
Element Analysis ◽  
Reinforced Concrete Frames ◽  
Infilled Frames ◽  
Masonry Infills ◽  
Push Down

AbstractThis study analytically investigated the behavior of reinforced concrete frames with masonry infills. For the analysis, VecTor2, a nonlinear finite element analysis program that implements the Modified Compression Field Theory and Disturbed Stress Field Model, was used. To account for the slip behavior at the mortar joints in the masonry element, the hyperbolic Mohr–Coulomb yield criterion, defined as a function of cohesion and friction angle, was used. The analysis results showed that the lateral resistance and failure mode of the infilled frames were significantly affected by the thickness of the masonry infill, cohesion on the mortar joint–brick interface, and poor mortar filling (or gap) on the masonry boundary under the beam. Diagonal strut actions developed along two or three load paths on the mortar infill, including the backstay actions near the tension column and push-down actions near the compression columns. Such backstay and push-down actions increased the axial and shear forces of columns, and ultimately affect the strength, ductility, and failure mode of the infilled frames.

EFFECTS OF TEMPERATURE AND SEED TUBER BUD POSITION ON SHOOT EMERGENCE OF THE POTATO CULTIVARS JEMSEG AND CONESTOGA

1987 ◽  
Vol 67 (2) ◽  
pp. 599-603 ◽  
Author(s):  
A. W. McKEOWN
Keyword(s):  
Seed Tuber ◽  
Potato Cultivars ◽  
Seed Tubers ◽  
Solatium Tuberosum ◽  
Delayed Emergence ◽  
Early Maturing ◽  
Basal Portion ◽  
Bud Position ◽  
Effects Of Temperature ◽  
Cut Seed

Shoots of the early-maturing potato (Solatium tuberosum L.) cultivar Jemseg often do not emerge uniformly when cut seed pieces are planted in cold soil. Under controlled temperatures of 10, 15 and 20 °C, shoots from whole tubers and basal portions of Jemseg tubers emerged later than those from apical portions of seed tubers. The delayed emergence of the basal portion was most pronounced at low temperatures and ranged from 5 to 17 d. Emergence from basal vs. apical portions of Conestoga was delayed by 10 d at 10 °C and by 4 d at 15 °C, only when seed tubers with a single dominant apical sprout were used. There was no delay at 20 °C. The variable time to emergence of shoots in the field can be explained by delayed emergence from basal buds on cut seed pieces.Key words: Potato, cultivars, emergence, bud position, temperature, seed tuber

scholarly journals “Push–Pull Technique” for the Management of a Selected Superomedial Intraorbital Lesion

2018 ◽  
Vol 04 (03) ◽  
pp. e105-e109 ◽  
Author(s):  
Paolo Castelnuovo ◽  
Giacomo Fiacchini ◽  
Francesca Fiorini ◽  
Iacopo Dallan
Keyword(s):  
Venous Malformation ◽  
Complete Resection ◽  
Safe Procedure ◽  
Combined Approach ◽  
Main Approach ◽  
Transnasal Approach ◽  
Superior Eyelid Approach ◽  
Push Down ◽  
Orbital Lesions

Orbital lesions are traditionally managed through external approaches when laterally located, and through a transnasal approach or other external approaches when medially located. However, when the lesion is superomedially located, it may determine a technical challenge.In this study, we present the case of a patient with a superomedial intraconal venous malformation of the left eye. We addressed the mass through a combined approach, using the transnasal route as the main approach, and the superior eyelid approach to push down the lesion to facilitate the excision. We have called this approach “push–pull technique.”We achieved a complete resection of the lesion and did not observe any intraoperative or postoperative complications. The last follow-up at 6 months postoperatively showed no recurrence, and the patient was satisfied and completely recovered.According to our experience, the “push–pull” technique seems to be a safe procedure and might be considered a valid alternative to address selected superomedial intraconal lesions.

Growth-room and field studies with seed tubers treated with ethylene and 1-methylcyclopropene (1-MCP) during storage

2006 ◽  
Vol 83 (2) ◽  
pp. 149-160 ◽  
Author(s):  
K. Pruski ◽  
R. K. Prange ◽  
B. J. Daniels-Lake ◽  
J. Nowak ◽  
T. Astatkie ◽  
...  
Keyword(s):  
Field Studies ◽  
Seed Tubers ◽  
Growth Room

Determination of optimum tuber planting density in the potato varieties Pentland Squire, Cara, Estima, Maris Piper and King Edward

1992 ◽  
Vol 119 (1) ◽  
pp. 35-44 ◽  
Author(s):  
D. C. E. Wurr ◽  
J. R. Fellows ◽  
E. J. Allen
Keyword(s):  
Complex Analysis ◽  
Seed Tuber ◽  
Tuber Size ◽  
Planting Density ◽  
Potato Seed ◽  
Stem Density ◽  
Seed Tubers ◽  
Net Returns ◽  
Analysis Technique ◽  
The Cost

SummaryThirty-two experiments examining the effects of the weight and within-row spacing of potato seed tubers on graded tuber yields of five varieties were conducted on eight sites from 1980 to 1985. A complex analysis technique was used to combine these data and estimate the optimum tuber planting densities for different ratios of seed cost to small (40–60 mm) and large (60–80 mm) ware value. The same technique could be applied to any other combination of seed cost, ware size and ware value.The optimum tuber planting density decreased with increasing seed-tuber weight. Differences in optimum planting density between varieties were much greater with small (35 g) than with large (105 g) seed tubers and decreased as the cost of seed increased relative to the value of ware. As large ware became worth more than small ware the influence of increasing seed cost on the optimum density was reduced. As the value of large ware increased, net returns increased and the effect of seed cost on net returns was reduced. Mean tuber size decreased with increasing stem density at harvest and at the same stem density was lower in varieties producing more daughter tubers/stem. Changes of mean tuber size (μ) and the spread of yield across size grades (σ) with time were well described by parallel curves in different varieties. It is suggested that in future it may not be necessary to determine optimum tuber planting densities by complex experiments involving several seed-tuber weights and spacings. Instead μ and σ could be estimated from simple experiments and tuber spacings determined by comparison with control varieties.

scholarly journals Pitfalls and limitations in seismic attribute interpretation of tectonic features

2015 ◽  
Vol 3 (1) ◽  
pp. SB5-SB15 ◽  
Author(s):  
Kurt J. Marfurt ◽  
Tiago M. Alves
Keyword(s):  
Seismic Data ◽  
Seismic Attributes ◽  
Seismic Attribute ◽  
3D Data ◽  
Amplitude Data ◽  
Seismic Sections ◽  
Push Down ◽  
Data Coherence ◽  
Level Of Experience ◽  
Tectonic Features

Seismic attributes are routinely used to accelerate and quantify the interpretation of tectonic features in 3D seismic data. Coherence (or variance) cubes delineate the edges of megablocks and faulted strata, curvature delineates folds and flexures, while spectral components delineate lateral changes in thickness and lithology. Seismic attributes are at their best in extracting subtle and easy to overlook features on high-quality seismic data. However, seismic attributes can also exacerbate otherwise subtle effects such as acquisition footprint and velocity pull-up/push-down, as well as small processing and velocity errors in seismic imaging. As a result, the chance that an interpreter will suffer a pitfall is inversely proportional to his or her experience. Interpreters with a history of making conventional maps from vertical seismic sections will have previously encountered problems associated with acquisition, processing, and imaging. Because they know that attributes are a direct measure of the seismic amplitude data, they are not surprised that such attributes “accurately” represent these familiar errors. Less experienced interpreters may encounter these errors for the first time. Regardless of their level of experience, all interpreters are faced with increasingly larger seismic data volumes in which seismic attributes become valuable tools that aid in mapping and communicating geologic features of interest to their colleagues. In terms of attributes, structural pitfalls fall into two general categories: false structures due to seismic noise and processing errors including velocity pull-up/push-down due to lateral variations in the overburden and errors made in attribute computation by not accounting for structural dip. We evaluate these errors using 3D data volumes and find areas where present-day attributes do not provide the images we want.

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