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Academic literature on the topic 'Allendale Area (N S W )'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Allendale Area (N S W )"

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Campagnolo, Marcelo, Ricardo Reis, Marcele Santos, Lúcia Kliemann, and Ricardo Savaris. "Which mode and potency of electrocoagulation yields the Smallest Unobstructed Area of the Fallopian Tubes?" Revista Brasileira de Ginecologia e Obstetrícia / RBGO Gynecology and Obstetrics 40, no. 06 (May 29, 2018): 332–37. http://dx.doi.org/10.1055/s-0038-1656718.

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Objective To determine which mode and potency of electrocoagulation, using a modern electrosurgical generator, yields the smallest unobstructed area of the Fallopian tubes. Methods In an experimental study, tubes from 48 hysterectomies or tubal ligation were evaluated. Tubes were randomly allocated to one of the following groups: group A) 25 W x 5 seconds (n = 17); group B) 30 W x 5 seconds (n = 17); group C) 35 W x 5 seconds (n = 18), group D) 40 W x 5 seconds (n = 20); group E) 40 W x 5 seconds with visual inspection (blanch, swells, collapse) (n = 16); group F) 50 W x 5 seconds (n = 8). Bipolar electrocoagulation was performed in groups A to E, and monopolar electrocoagulation was performed in group F. Coagulation mode was used in all groups. Digital photomicrography of the transversal histological sections of the isthmic segment of the Fallopian tube were taken, and the median percentage of unobstructed luminal area (mm2) was measured with ImageJ software (ImageJ, National Institutes of Health, Bethesda, MD, USA). The Kruskal-Wallis test or analysis of variance (ANOVA) was used for statistical analysis. Results Ninety-six Fallopian tube sections were analyzed. The smallest median occluded area (%; range) of the Fallopian tube was obtained in the group with 40 W with visual inspection (8.3%; 0.9–40%), followed by the groups 25 W (9.1%; 0–35.9%), 40 W (14.2; 0.9–43.2%), 30 W (14.2; 0.9–49.7%), 35 W (15.1; 3–46.4%) and 50 W (38.2; 3.1–51%). No statistically significant difference was found among groups (p = 0.09, Kruskal-Wallis test). Conclusion The smallest unobstructed area was obtained with power setting at 40 W with visual inspection using a modern electrosurgical generator. However, no statistically significant difference in the unobstructed area was observed among the groups using these different modes and potencies.
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Soares, Louis. "Hecke Triangle Groups, Transfer Operators and Hausdorff Dimension." Annales Henri Poincaré 23, no. 4 (October 4, 2021): 1239–81. http://dx.doi.org/10.1007/s00023-021-01117-1.

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AbstractWe consider the family of Hecke triangle groups $$ \Gamma _{w} = \langle S, T_w\rangle $$ Γ w = ⟨ S , T w ⟩ generated by the Möbius transformations $$ S : z\mapsto -1/z $$ S : z ↦ - 1 / z and $$ T_{w} : z \mapsto z+w $$ T w : z ↦ z + w with $$ w > 2.$$ w > 2 . In this case, the corresponding hyperbolic quotient $$ \Gamma _{w}\backslash {\mathbb {H}}^2 $$ Γ w \ H 2 is an infinite-area orbifold. Moreover, the limit set of $$ \Gamma _w $$ Γ w is a Cantor-like fractal whose Hausdorff dimension we denote by $$ \delta (w). $$ δ ( w ) . The first result of this paper asserts that the twisted Selberg zeta function $$ Z_{\Gamma _{ w}}(s, \rho ) $$ Z Γ w ( s , ρ ) , where $$ \rho : \Gamma _{w} \rightarrow \mathrm {U}(V) $$ ρ : Γ w → U ( V ) is an arbitrary finite-dimensional unitary representation, can be realized as the Fredholm determinant of a Mayer-type transfer operator. This result has a number of applications. We study the distribution of the zeros in the half-plane $$\mathrm {Re}(s) > \frac{1}{2}$$ Re ( s ) > 1 2 of the Selberg zeta function of a special family of subgroups $$( \Gamma _w^N )_{N\in {\mathbb {N}}} $$ ( Γ w N ) N ∈ N of $$\Gamma _w$$ Γ w . These zeros correspond to the eigenvalues of the Laplacian on the associated hyperbolic surfaces $$X_w^N = \Gamma _w^N \backslash {\mathbb {H}}^2$$ X w N = Γ w N \ H 2 . We show that the classical Selberg zeta function $$Z_{\Gamma _w}(s)$$ Z Γ w ( s ) can be approximated by determinants of finite matrices whose entries are explicitly given in terms of the Riemann zeta function. Moreover, we prove an asymptotic expansion for the Hausdorff dimension $$\delta (w)$$ δ ( w ) as $$w\rightarrow \infty $$ w → ∞ .
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Soares, Louis. "Hecke Triangle Groups, Transfer Operators and Hausdorff Dimension." Annales Henri Poincaré 23, no. 4 (October 4, 2021): 1239–81. http://dx.doi.org/10.1007/s00023-021-01117-1.

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AbstractWe consider the family of Hecke triangle groups $$ \Gamma _{w} = \langle S, T_w\rangle $$ Γ w = ⟨ S , T w ⟩ generated by the Möbius transformations $$ S : z\mapsto -1/z $$ S : z ↦ - 1 / z and $$ T_{w} : z \mapsto z+w $$ T w : z ↦ z + w with $$ w > 2.$$ w > 2 . In this case, the corresponding hyperbolic quotient $$ \Gamma _{w}\backslash {\mathbb {H}}^2 $$ Γ w \ H 2 is an infinite-area orbifold. Moreover, the limit set of $$ \Gamma _w $$ Γ w is a Cantor-like fractal whose Hausdorff dimension we denote by $$ \delta (w). $$ δ ( w ) . The first result of this paper asserts that the twisted Selberg zeta function $$ Z_{\Gamma _{ w}}(s, \rho ) $$ Z Γ w ( s , ρ ) , where $$ \rho : \Gamma _{w} \rightarrow \mathrm {U}(V) $$ ρ : Γ w → U ( V ) is an arbitrary finite-dimensional unitary representation, can be realized as the Fredholm determinant of a Mayer-type transfer operator. This result has a number of applications. We study the distribution of the zeros in the half-plane $$\mathrm {Re}(s) > \frac{1}{2}$$ Re ( s ) > 1 2 of the Selberg zeta function of a special family of subgroups $$( \Gamma _w^N )_{N\in {\mathbb {N}}} $$ ( Γ w N ) N ∈ N of $$\Gamma _w$$ Γ w . These zeros correspond to the eigenvalues of the Laplacian on the associated hyperbolic surfaces $$X_w^N = \Gamma _w^N \backslash {\mathbb {H}}^2$$ X w N = Γ w N \ H 2 . We show that the classical Selberg zeta function $$Z_{\Gamma _w}(s)$$ Z Γ w ( s ) can be approximated by determinants of finite matrices whose entries are explicitly given in terms of the Riemann zeta function. Moreover, we prove an asymptotic expansion for the Hausdorff dimension $$\delta (w)$$ δ ( w ) as $$w\rightarrow \infty $$ w → ∞ .
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Vieira, Antonio José Dias, Dario Alves de Oliveira, Taís Cristina Bastos Soares, Ivan Schuster, Newton Deniz Piovesan, Carlos Alberto Martínez, Everaldo Gonçalves de Barros, and Maurílio Alves Moreira. "Use of the QTL approach to the study of soybean trait relationships in two populations of recombinant inbred lines at the F7 and F8 generations." Brazilian Journal of Plant Physiology 18, no. 2 (June 2006): 281–90. http://dx.doi.org/10.1590/s1677-04202006000200004.

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This work aimed to identify the quantitative trait loci (QTL) associated with photosynthesis and growth and productivity traits of soybean and to study possible associations between these traits by the analysis of coincidence of QTL in linkage groups (LGs). Thus, populations of recombinant inbred lines (RILs) of the F7 and F8 generations derived from the cross between the varieties BARC-8 and Garimpo were used. The traits evaluated were net assimilation rate of CO2 under saturating light (Asat), potential photosynthesis rate (Pmax), leaf area (A), specific leaf area (SLA), specific leaf nitrogen (N); root (W R), nodule (W N), stem (W ST), leaf (W L), pod (W P) and plant dry mass (W T); nodule (nN), seed (n s), and pod number (nP); seed fresh mass per plant (W S), one-hundred seed fresh mass (W HS) and seed protein percentage (P%). It was possible to identify the following QTL associated with the following soybean traits: SLA, Asat, N, W R, W ST, W L, W T, W P, W HS, n s and nP, indicating that the RIL population has a great potential for mapping loci associated with quantitative traits of the soybean crop. The correlations between the soybean traits were partially confirmed by coincidence of QTL.
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Yang, X. B., and F. Feng. "Ranges and Diversity of Soybean Fungal Diseases in North America." Phytopathology® 91, no. 8 (August 2001): 769–75. http://dx.doi.org/10.1094/phyto.2001.91.8.769.

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Introduced in 1765, soybean is the second largest crop in North America and is grown over a diverse agroecosystem that covers a geographic area of 2,300 km in north-south (N-S) and 2,400 km in east-west (E-W) directions (latitude 28°33 to 48°33′N, longitude 74°W to 103°02′W). The diversity and the distribution ranges of soybean fungal diseases in this agroecosystem were examined and several geographic patterns were identified. Disease diversity measured by the number of diseases per latitudinal breadth had a gradient that decreased as latitude increased. Diseases with ranges centered at higher latitudes had greater geographic ranges in the N-S direction. Disease diversity measured by number of diseases per longitudinal breadth decreased from E-W. Significant linear relationships between disease diversity and planting area were found. A region centered around the Delta Area (approximately 36 to 39°N and 88 to 91°W), which is a transition area of three rainfall regime regions of the continent and is an area of confluence of the Mississippi, Missouri, and Ohio rivers, had the highest disease diversity in this agroecosystem.
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Zhao, Zi Qi, Li Guang Li, Hong Bo Wang, Xian Li Zhao, and Peng Jiang. "Characteristics of Land Surface Temperture (LST) within the Third Ring Road of Shenyang." Applied Mechanics and Materials 737 (March 2015): 913–16. http://dx.doi.org/10.4028/www.scientific.net/amm.737.913.

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Urban heat island (UHI) effect becomes hot spot in the field of urban climatology in the recent decades. Two sampling belts on the Landsat TM/ETM+ image across the center point of main urban area of shenyang were selected along the E-W and S-N directions in order to analyse the characteristics of UHI effect and discuss the relationships between LST and UHI source or sink. The results indicate that for the E-W direction sampling belt, the maximum and minimum LST values were 37.46 °Cand 33.44 °C in 2001 respectively, while those were 34.61 °C and 33.30 °C in 2010. For the S-N direction sampling belt, the corresponding values were 34.53 °C and 29.27 °C in 2001, 34.47 °C and 29.69 °C in 2010. LST fluctuated significantly in the E-W direction sampling belt in 2010 and the difference value was 4.01 °C, so was in the S-N direction sampling belt in 2010 and the difference value was 4.78 °C. LST of the grid was a positive correlation with LST of the UHI source area of grid in 2001 and 2010, so was with that of UHI sink area in 2001 and 2010. LST of grid was a positive correlation with UHI source area.
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Liu, Anhua, Demin Xu, Michael Henke, Yue Zhang, Yiming Li, Xingan Liu, and Tianlai Li. "Determination of the Optimal Orientation of Chinese Solar Greenhouses Using 3D Light Environment Simulations." Remote Sensing 14, no. 4 (February 14, 2022): 912. http://dx.doi.org/10.3390/rs14040912.

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With the continuous use of resources, solar energy is expected to be the most used sustainable energy. To improve the solar energy efficiency in Chinese Solar Greenhouses (CSG), the effect of CSG orientation on intercepted solar radiation was systematically studied. By using a 3D CSG model and a detailed crop canopy model, the light environment within CSG was optimized. Taking the most widely used Liao-Shen type Chinese solar greenhouse (CSG-LS) as the prototype, the simulation was fully verified. The intercepted solar radiation of the maintenance structures and crops was used as the evaluation index. The results showed that the highest amount of solar radiation intercepted by the maintenance structures occurred in the CSG orientations of 4–6° south to west (S-W) in 36.8° N and 38° N areas, 8–10° S-W in 41.8° N areas, and 2–4° south to east (S-E) in 43.6° N areas. The solar radiation intercepted by the crop canopy displayed the highest value at an orientation of 2–4° S-W in 36.8° N, 38° N, 43.6° N areas, and 4–6° S-W in the 41.8° N area. Furthermore, the proposed model could provide scientific guidance for greenhouse crop modelling.
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Mitsuishi, Mayumi, Simon R. Wallis, Mutsuki Aoya, Jeffrey Lee, and Yu Wang. "E–W extension at 19Ma in the Kung Co area, S. Tibet: Evidence for contemporaneous E–W and N–S extension in the Himalayan orogen." Earth and Planetary Science Letters 325-326 (April 2012): 10–20. http://dx.doi.org/10.1016/j.epsl.2011.11.013.

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Delplace, Franck. "An Analytic Form for Riemann Zeta Function at Integer Values." Journal of Mathematics Research 14, no. 6 (November 28, 2022): 1. http://dx.doi.org/10.5539/jmr.v14n6p1.

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An original definition of the generalized Euler-Mascheroni constants allowed us to prove that their infinite sum converges to the number (1-Ln2) . By considering this number is the Lebesgue measure of a set defined as the difference between the area of the square unit and the area under the curve y=1/x 1≤x≤2 ; we introduced a partition of this set such that each Lebesgue measure of the subsets can be related to values of Riemann zeta function at integers. From this relationship, we proved that the Lambert W function can produce all ζ(s)  values whatever is the parity of s . Finally, by considering that ζ(s)  values allow calculation of the probability, for s  integers chosen in an interval [1,n] n∈N , to be coprime; we proved that Lambert W function can describe prime numbers distribution.
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Tirkaamiana, M. Taufan, Lailan Syaufina, and Jumani Jumani. "Growth Analyses of Dipterocarpaceae Stand on Selective Cutting and Line Planting Silvicultural System with Different Planting Line Direction in North Kalimantan." Journal of Tropical Silviculture 13, no. 03 (December 29, 2022): 266–73. http://dx.doi.org/10.29244/j-siltrop.13.03.266-273.

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The potency of the Indonesian Tropical Forest, particularly in Kalimantan, has been shrinkage year by year. Selective Cutting and Line Planting System (SCLP) is expected to increase the productivity of the tropical forest. This study aims to analyze the growth and diameter increment of Dipterocarpaceae stand planted in West-East (W-E) and North-South (N-S) planting direction on SCLP at concession area of PT. Intracawood Manufacturing, Bulungan District, North Kalimantan, Indonesia. Growth and diameter increment data of Dipterocarpaceae was obtained by field measurement in 4 (four) permanent plots sized 100 m x 100 m with W-E and N-S directions. The study revealed that the largest growth and average diameter increment on a five-year-old stand is Shorea parvifolia with planting direction of W-E about 8,5 cm and 1,92 cm/yr. In contrast, the smallest is Dryobalanops lanceolata with N-S planting direction about 4,6 cm and 0,99 cm/yr. Planting line direction does not influence diameter increment. It is due to the stand position in the spacing line as an ex-cutting area or the right and left-hand sides of the planting line with low density and low average stand height (17,62 m). Therefore, the light intensity on the N-S planting line direction has no barrier of spacing line stand. Keywords: Increment, Light Intensity, Planting Line Direction
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Book chapters on the topic "Allendale Area (N S W )"

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James, Simon. "What and Where? Revised Overview of Base Extent." In The Roman Military Base at Dura-Europos, Syria. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198743569.003.0025.

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Archaeological evidence indicates that, during the final halfcentury of the life of the city, the area directly annexed by the military was significantly larger than the original excavators realized. In addition to concentrations of soldiers around the gates and defences, and at various places within the ‘civil’ town, the military came to control a single continuous swathe of the urban interior, comprising the entire N part of the walled area from the W defences to the river cliffs, and extending as far as the S end of the Citadel, plus the floor of the inner wadi right down to Lower Main St opposite the (by Durene standards) showy C3 bath, which it also apparently built. This area totals c.13.5 ha (c.33 acres)—a literal quarter of the intramural area which today covers c.52 ha (c.118 acres, measured from the CAD plan of the city by Dan Stewart; both city and base were slightly bigger in antiquity, before loss of the River Gate and parts of the Citadel). In its final form, the base included several distinct zones (Pl. XXIII). The NW part of the city had become a military enclosure, bounded on the E side by a continuous wall down the W side of G St, incorporating the street facades of the E3 bath and E4 house. On the S it was defined by the ‘camp wall’ from the city defences to D St; with no sign of a wall across blocks F5 or F7, the perimeter between D and F Sts is inferred. It must be presumed that, as to the W, the 8th-St-fronting properties of the two blocks were taken over, but that the party walls comprising the boundary with civil housing to the S was not further elaborated. These lines converged on the amphitheatre, which formed the corner of the enclosure. This perimeter of the NW enclosure involved physically blocking Wall, A, C, D, and 10th Sts. A major entrance was on 8th St, at G St between the amphitheatre and the E4 house.
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Tikoff, B., P. Kelso, A. K. Fayon, R. Gaschnig, R. M. Russo, J. Vervoort, B. Jicha, and M. J. Kahn. "The jagged western edge of Laurentia: The role of inherited rifted lithospheric structure in subsequent tectonism in the Pacific Northwest." In Laurentia: Turning Points in the Evolution of a Continent. Geological Society of America, 2022. http://dx.doi.org/10.1130/2022.1220(22).

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ABSTRACT The rifted Precambrian margin of western Laurentia is hypothesized to have consisted of a series of ~330°-oriented rift segments and ~060°-oriented transform segments. One difficulty with this idea is that the 87Sr/86Sri = 0.706 isopleth, which is inferred to coincide with the trace of this rifted margin, is oriented approximately N-S along the western edge of the Idaho batholith and E-W in northern Idaho; the transition between the N-S– and E-W–oriented segments occurs near Orofino, Idaho. We present new paleomagnetic and geochronologic evidence that indicates that the area around Orofino, Idaho, has rotated ~30° clockwise since ca. 85 Ma. Consequently, we interpret the current N-S–oriented margin as originally oriented ~330°, consistent with a Precambrian rift segment, and the E-W margin as originally oriented ~060°, consistent with a transform segment. Independent geochemical and seismic evidence corroborates this interpretation of rotation of Blue Mountains terranes and adjacent Laurentian block. Left-lateral motion along the Lewis and Clark zone during Late Cretaceous–Paleogene time likely accommodated this rotation. The clockwise rotation partially explains the presence of the Columbia embayment, as Laurentian lithosphere was located further west. Restoration of the rotation results in a reconstructed Neoproterozoic margin with a distinct promontory and embayment, and it constrains the rifting direction as SW oriented. The rigid Precambrian rift-transform corner created a transpressional syntaxis during middle Cretaceous deformation associated with the western Idaho and Ahsahka shear zones. During the late Miocene to present, the Precambrian rift-transform corner has acted as a fulcrum, with the Blue Mountains terranes as the lever arm. This motion also explains the paired fan-shaped contractional deformation of the Yakima fold-and-thrust belt and fan-shaped extensional deformation in the Hells Canyon extensional province.
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James, Simon. "How Did the Base Work?" In The Roman Military Base at Dura-Europos, Syria. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198743569.003.0028.

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We now consider how the military base area operated, as a zone where a large number of people lived and worked on a routine basis. On one hand, to function it required the affordances of its internal communications, connections with the civil town, and access to roads, river, and lands beyond the walls; on the other, there was a need for surveillance and control of activities within the base, and of movements across its boundary. The most obvious part of the base boundary (Plate XXII) is the substantial mud brick wall ploughed across four blocks from the city defences just S of Tower 21, and blocking Wall, A, C, and D Sts, with a gate established at B St. How the S boundary was defined E of D St has always remained an issue. If it was necessary to build a wall at the W end, why was this not simply continued all the way to, e.g., the S end of the Citadel? Across blocks F7 and F5 it seems that the boundary of the military zone simply comprised party walls between military and civilian-occupied structures. The same was true within block B2, by the Citadel, although the boundary probably comprised building frontages along Lower Main St. On the plateau, as the camp wall may have been a subsequent local enhancement, except where the amphitheatre formed part of it, the boundary may generally have comprised the rear walls of military-held houses lining the S side of 8th St—probably all properties from the city wall to H St. The course of the boundary along the W side of the inner wadi is unknown, but the base is suggested, as along 8th St, to have incorporated at least all properties lining the S side of the Wadi Ascent Road, if not encompassing all blocks on the wadi slope—in which case the boundary here may rather have comprised property frontages on K St. The base area was split by site topography into two major zones, the flat plateau, and the N branch of the inner wadi around the Citadel. Each was further subdivided.
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James, Simon. "The Plateau Zone East of G St." In The Roman Military Base at Dura-Europos, Syria. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198743569.003.0020.

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The N end of the city’s plateau zone E of G St, bounded by the N wadi, the river cliff, and the head of the inner wadi, comprising the remotest corner within the walls, also became part of the Roman military quarter. Here, as across the whole N part of the city, the stratigraphy is shallow, rarely deeper than a metre, with bedrock showing in places. Surface indications and magnetometry suggest that much of the region had been built up in pre-Roman times, although there may have been areas of open ground. The street grid had been substantially laid out here, especially H St which ran to the N city wall, but E of this line it seems partly to break down. In particular, in the nominal areas of projected block positions X1–X8, 10th St actually curved off-grid to the S, probably preserving the line of an early approach road to the N end of the Citadel before the stronghold was separated from the plateau by a great quarry and rebuilt. This far N region was presumably mostly residential before AD 165, except for two known sanctuaries beside H St: the so-called Dolicheneum in X7, and a temple of unknown dedication in X9. Under Roman rule it became dominated by insertion of the massive residence known as the ‘Palace of the dux ripae’, here referred to as the Roman Palace. Closures of both G and I Sts on the N side of 10th St, by the building of Roman structures across them, indicates that the zone N of this line became a military enclosure. This was accessible from the civil town only via an entrance on H St, and from the W part of the base area on the plateau, already enclosed by a boundary along the W side of G St, via a smaller entrance on the diverted line of ‘12th St’ at the N-most point of block E3. Within the re-entrant to the continuous base perimeter created by the G St and 10th St lines, more blocks appear to have been taken over by the military.
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James, Simon. "The Wadi Zone Campus, Citadel, and C3 Bath." In The Roman Military Base at Dura-Europos, Syria. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198743569.003.0021.

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From the junction of H and 8th Sts, which gave access to the twin main axes of the military base zone on the plateau, H St led S to the bulk of the civil town and ultimately to the Palmyrene Gate, the steppe plateau W of the city, and the roads W to Palmyra and NW up the Euphrates to Syria. The fourth side of the crossroads followed a curving course SE, down into the inner wadi, then snaking through the irregularly laid-out old lower town to the now-lost River Gate, portal to the Euphrates and its plain. Of most immediate significance is that the Wadi Ascent Road also linked the plateau military zone with what can now be seen as another major area of military control, in the old Citadel, and on the adjacent wadi floor. The N part of the wadi floor is now known to have accommodated two military-built temples, the larger of which, the A1 ‘Temple of the Roman Archers’, was axial to the long wadi floor, which in the Roman period appears to have comprised one of the largest areas of open ground inside the city walls. This is interpreted as the campus, or military assembly and training ground, extension of which was commemorated in an inscription found in the temple. In 2011, what is virtually certainly a second military temple was found in the wadi close by the first, built against the foundation of the Citadel. This is here referred to as the Military Zeus Temple. Behind the Temple of the Roman Archers was a lane leading from the Wadi Ascent Road to the N gate of the Citadel. It helped define a further de facto enclosure, effectively surrounded by other military-controlled areas and so also presumed to have been in military hands. The Citadel itself, while in Roman times already ruinous on the river side due to cliff falls, still formed part of the defences. Moreover the massive shell of its Hellenistic walls now also appears to have been adapted to yet more military accommodation, some of it two storeys or higher.
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Højerslev, Niels K. "A History of Early Optical Oceanographic Instrument Design in Scandinavia." In Ocean Optics. Oxford University Press, 1994. http://dx.doi.org/10.1093/oso/9780195068436.003.0011.

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Interest in the optical characteristics and variability of the sea has grown for nearly two centuries. Most of the early work in this area was performed by European investigators. Perhaps the earliest reference to an optical oceanographic research cruise can be found in the book by Otto Krümmel (1886), in which the author refers to the Rurik circumnavigational cruise of 1817 made by Otto von Kotzebue. In these studies von Kotzebue made measurements using optical instrumentation comprised of a piece of red cloth tethered to a line and lowered into the sea. With this technique, von Kotzebue was able to crudely measure the depth of penetration of light. This technique was refined by using a white plate, and the first measurements in the Pacific (at 10°N 152°W) yielded measurements of 49 meters. It is worth noting that this work was done several decades before the famous efforts of Secchi (1866). Efforts to incorporate photographic techniques to characterize the underwater light field were also developing in the late 1800’s. In March, 1885 some experiments were made in the waters off Nice, France, in which a photographic plate was submerged to depths of several hundred meters. Additional historical information can be found in the classical textbook by Sauberer and Ruttner (1941). Theoretical treatments of optical oceanography developed somewhat later. Ludvig Valentin Lorenz published the first works on the theoretical aspects of marine light scattering. This work, originally published in Danish (Lorenz, 1890), was subsequently translated into French in 1915. Martin Knudsen (founder of International Council for the Exploration of the Sea, and developer of some of the fundamental concepts for making hydrographic calculations) also had concerns about marine optics as reflected in correspondence he sent to Professor Otto Pettersson (father of Hans Pettersson) in Sweden: . . . In studying those provinces of water and particularly of sea water, which are of importance to the organisms living therein, the study of the light contents of the water must occupy the prominent place. Light contents play in many respects a similar part to that of oxygen content but have not been so strongly investigated as the latter. . . .
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"large fluctuation, which usually think grid is resistive obvious or perceptual characteristics of different. Frequency domain analysis of impedance values As can be seen from the test station area topology, in the Tai area, power line wiring is complex, with many branches, and longer. In such a high frequency, signal propagation environment can large fluctuation, which usually think large fluctuation, which usually think grid is r te i sc i ss t o if v e d if ofe b rv e in o tu . s or perceptual characteristics of different. Frequency doma in analysis of es d nn c vm al u ee s Apo s ne f mi a th t es sw ta ae r ea ori p og l o Ti a im ar ay , oa w eh r , i ne wd i r nn g sr . c o ec x mh a ye q b ancy h agn d go e . g I sn u ch av ir h gm h rt e qu y, ss i n al pm ro p nip at e nr m er n tce c es a l fn o r aq ue m ly-ti." In Structural Health Monitoring and Integrity Management, 152–53. CRC Press, 2015. http://dx.doi.org/10.1201/b18510-48.

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"Jeu as nte -A A u fr g ic uasnt. T lo h w ese in tropospheric jetstr ea le mvc el l , u de antdhew su e b st t ro A pi f c ri aclan ea st m er ildy -, deve s. These fast-moving upper pre Spoa lo re pdendes th srpoou li gch ie s s . ound early warning and disaster ltehveeltw ra inn cieties in sdpsoh rt avoeffamr-o re is atcuhrien , g m im opmaecn ts tuwm it , hproelslpuetcatnttso , reeflfyorh ts e , a w vi h ly icohndp ev o e st l -o dpiisnagstceorurnetlr ie ie fsa , ned sp reech ia alb ly ilA ita fr tiicoan , a an tm dop sp es htesr , ic to dgyentahm er ic w s. ith many other aspects of the tdo is atshtee rs s . evIen re imm ake them m creas peadc ts vuo ln fed ra ro o u re ghatn bility doafnmdsooo re th vulnerable Tropical cyclones have both direct and indirect severe consequences of natural disasters c iet eyrn to a tu t r led to th haeliam ss poacc ia ts t ed onwK ith entyhaensrtarionn fa gll. w T in hdes , doic re ecatniwmapvaecst , saanrdefdoerc la N ra attiuornalofDtihsea st 1e9r90Rseadsuc th ti eon In t ( eIrD na N ti D on R a ) l D by e ca th deeaen xc yescsyicvleonperew cip e ith it iant io th netw ha etstoec rn cu Irnw di haennO th ceeaenffeex ct tsenodfpUrnoim te odteNdaitsiaosn te s. rpTrheevemna ti joonraonbd je cptrievpearoefdInD es NsD th R ro iusgthocolv im er atK ol eongyiac . a l It sh hit the Keny arneccoorod uld be as s t . shTohwen th o a ted ind tino th cayt rect ecflto he fe nce ts ahvaaosileafavbe le rcdo ev n e ce ny dama lo rgp te e, in dgc in otuen rn tr aiteiso , ntaol re adcu ti coen , l os esspo ecially in the cyclone, however, occur when the cyclone is far from often as so acnid at esdocw io it ehconnaotm ur iacld di issa ru st petrisofn li , few , hpircohpea rt ryet it hserceegn io tr n e , butthsetrie ll bayt tra in cttesrtfhee ri n re g g io wniatlh wi tnhdes to n w or a m rd aslh at etlip tu tdoess hi tfhtattheap re o st p -d re is vaaslteenrt re iln ie f and . r T eh haeb se il it cao ti uolnd circ Culloas ti e on patterns of the many developing general ciin rc te urlaac ti t o io nnsohvaevrerbeegeinonoabl winds. the regi soenrvaendd between the cou A n tr n ies the extra-includin egw . th d e im feuntsuiroen re to cu rnraetnucrealocflidm ro at uegh variability, tsryosp te ic masl , wmeiadtlhaetr it u sy dsetewmesstle ik r e li etsh , e N fr oorn th ta lAatn la dntb ic lo coksicn il g ­ tchuerrternatdigtlioobnaallcsopn ac cee -r t n im aebopuattttehrenspootfengtlioablacths, a n is geth in e T la e ti l climate, Ke l o ec n o , nenae st Atlantic pat nyan rai cntfiaolnlsanhdavEeNaSltseor ns b , eeanndobEsuerravse ia dpbaetttw erns. inclu O, quasi-biennial oscillati eoenn , h cl u im madt ing the space-time ch an eaecvteinvtis ti etsh . roSuug ch h e im nv piarcoanrm ac e te nrtiasltidces gr oafdaetx io tre ts are currently subj nembey intraseasonal wave, and so forth. The influence of the of many studies and debates, as reflected in the 19 c9t5sw co a m te prlebxod topographical patterns and the large inland Intergovernmental Pane inland wat ieersbiosdv ie e s ry insc ig lu n d if eicL an ak teinViKce to nryiaa . , w Th h e ic h la h rg aess in c d ie inctaitfe ic d ‘d aisssceesrsnm ib elnet inf olfoncC lim lim a ate Change (IPCC) an area of about 70,000 km2 and is the second largest the recent climate trends l ’ u . eInPcCeCof te change, which freshwater lake in the world. The complex topo­ ever, that no conclusive evidence ( 1h9u9m5a ) nnaoctteid vi , tiheosw in ­ K gr i a li p m hical patterns include Mt. Kenya, Mt. human-can be derived fo anjaro, and the Great Rift Valley with its accurate inmdeutcheoddscf li omrattheed ch et aencgte io nsiagnnd al s a tt urn ib ti ult io mnoroercaltitm en a d te anptroccheasisnesofcamnobuentoab in ta s i . n D ed e ta fr i o ls of the regional natural/anthropoge f Anyamba 1992, Fremming 1970, manOdg al F lo in 1d9 la 9 te 3 r , acn ha dng ac e cu si rgan te a ls cla im re atanv ic a ilab ( lhe, u m to agne -t ihnedrucweid th ) ad celq im ua attee 1966. tch li e m si ast . ecSheavnegrees , icnocnes lu eddqau ta e n for testing various hypo­ patterns of extreme clim iantge ces ecvheanntgseosf in htuhmeasnp -a icned -u ti c m ed e like drought, would cDorm ou pgohntenatnsdoofthnear tu erxatl reme climate events are normal h ca ig ll hlfiogrhtceld ea brym th it eigIaPtC io C n . and adaptation policies, as iam nd pacco ts m m of onthpehseenon me n in atew ra o n rl nduwaildceliemvaetreyvyaeraira . b T ili htey men Gtlaolbadlegcroandcae ti ronnapbrooucte ss heusmaannd -i nsduusc ta eidn ab ein li vtiyr on o ­ f m an idn im ad al eqiuna the de atural disasters, however, te drou v g el hotpesdhoccokunatbrs ie osrbw er hserheaveef fi b ci aernettniaetsurlaeld re to so u een Conference th rc ees vita on o rga Enlnivstao ir t most o io nnmeonfs ocioecon t the anUdn it oemd ic Naat ctivi­ Sustain iaobn le s." In Droughts, 84. Routledge, 2016. http://dx.doi.org/10.4324/9781315830896-60.

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9

"scto th ara ti rsetc ic te s d ( M mo OdSe ) l . f S or m ec it ahstadnad ta are called model output 1994). The state of ENSO is only one of many factors obs terevveedn SS gi T v en a perfect SRSoTp el feow re sckais ( t 1 -9 9i7 .e ) ., shtohweu (K se r d is hn to aKfuom re acrae st t al t . h1e99I5n ) d . ian summer monsoon m to oid ts elEuNsS ed O -a r t -N t C he E P cu rrent operational atmospheric Ward et al. (1993) discuss the useful level of skill In their study e , la ftoerd ty r -a fi i need vne fa lylspastu te brsn ta snfto ia rlpa ra d c ju ti sctamleun se ts . m of a d tr eop in ic a re l al n o ti r m th e A by f ri tchaenU fo KreM ca e st tse or th ol aotgihcaavleOb ff eiecnee (h xianm dc in aesd ts ) fo bra se th d e on specif e ie a d rs ( oofbsseeravseodn ) alSS fo Trew ca esrtess re in la ctei on 1s9h8i6p . swTih th esgeloabrael ly ladrigsetlry ib ubtaesdedSSoTn , SS st Tatiin st itchaelm ea o ch d el sism imulation wapserrieopde at 1e9d50 th -i 9r4 te . enEa ti cmh es s , e w as hoenraelpSoonue th n t. A O tla vnetrict , hean la dstade re claad ti e v , eltyhesm re aalll -ti EmNeSfOo re ccoam sts ­ u initial co unldaitt io io nnswatso st easrttiemdatwe ith th e s lig mha tl gynid tu if dfee ren otfvhaalviedah te addahisnkdic ll asstismim lar adteotwhiatthotbhtea in seadme fr osm ta t c is rto ic sasl -v av anrp ia re ti doincs ta ble and therefore random atmospheric methods. The chief limitation to further progress is a rai enrfaag ll edf or tion th ca elcm ul oad te e l. thTehebtehsitr te meondseilmeus la ti t m io antseao re flsaecaksoonf ( gJluonbeal th tr roopu ic gahlSSeSpTtefm or beecra ) s . tsAvcaclu id ra f te orfo th re ecawse ts ttgylpoibcaall ly v , a a ri l th ea ocuhghgitvheen seasonal SST pattern. Quite of ENSO would help, but would in most years be well, it sho at w io ends in sem as oodneall re ra piln ic fa altledpa th tt eeronbs se qruvietdeifn al sluffo fi rceiceanst. tsAatrmeoaslp so heu ri scedd , ynbaumtitchaely -m oondleyl -h baavseedusreaf in ul ­ T re hgu io s ns fo rofptrheec ip w it s a ystematic or tlido , n -t rhee la tmesdpaa ti pap ll l y ic var odel pre a d ti i o ct nys in g in biases. skill with lead times of a month or less before the require some kind ions wmoaun ld y r th ai antf al hlusm ea asnoin ty ( Fhoa ll sanidncerteaals . ed1 99 th 1 e ). Istuisscaelpsto ib p il o it s y si b o le f g ki ennderoaf te bdi as byadajuM stm OS ofteacdhjnuisqtumee . n T ts h , e perhaps those tropical west Africa to drought through the pro­ production of operat einot places a huge bnue rd ed en foorntthhiesg co re vsesrivoevreerdu re c c ti eonntd in ecnaedaers -. coTahsitsalcw ha e n st geAfirn ic a th nefolraensdtM because each time the m na oldd el y n is a m ch ic aanlge fo d r , eacansetwmsoedteo ls f s (e u . r g fa ., ceElb ta ohuinrdaan ry dhGaosnbgee1n99s6 ho ) w to nhbayve se v th e e ra lpo au te tnhtoirasla ne O ed S e statistics must be calculated to provide the to weaken the north African monsoon. More studies nneacleys si d sa s ad ojfu ry Msm tm u e lt n id ts e . c T ad h a is l re en qu se ir m es bltehsetgoe ne orbatta io in natnhdetorfopp ic oasls ib nloer th re g A io fr n ic aalnarnatihnrfo al p l, ogaesniwce ll inafs lu efnocr es on fundamental OiSmp st rao ti vse ti m cs enatnsdtuond th eerssecom re osdtehles , nseuecdh fo as r reg W ion ar sdwe it thaml. a ( r 1 gi 9n9a3l ) seaalssoonadlisrcau in sfsaltlh , e a re sk n il eleo de odt . her tahboosvee . related to the flux adjustments, discussed m tim ad eefboy re c th a e st sff real­ UK orM th et eeon ro olro th g e ic aasltOBfrfaizcielsw in ectes1e9 as 8o7n . dro Kungohwt le p d re gdeico ti fonEsNS in O m is a n in ysup ff airctisenotffotrher eg w io o n rl adlT se hviesreisa relatively dry area, subject to intermittent lbeescsaium se p o in rt a th n ese regions its influence is either small or Hastenr dartohuagnhdt. c T ol hleasbeorfao to re rs c a ( set . s g , ., asHw as etlelnarsatthho1s9e95b ) y , p ea ro st foBurnad zil an t than other factors. For instance, north­ are mainly statistical, although real-time dynamical patterns ( lFyo ll iandf lu west A nd eentcael. d frican w 19 b9y1 , H tro ept ic saela so Ant la ra nitn ic fa ll astenrath 1995, WSaSrTeM for eetceaosrtosl og hiacvae ard based on tropi lcbaOlAfefe ic n e . mTahdee st saitn is ctei cal 19f9o4 re ca bsy ts tahreeS1S9T 97 ) i . n In th aeddtirtoipoinc , aplaIrn ts d i of the Sahel are affected by on ENSO SSTs. On tl aanv ti ecraSgSeT , t a ro npoim ca allyAp tl aatn te ti rcnsSaSnTdsF Si o m ll i a la nrd ly , eltocaall . SS 19 T9p1a , tt Bar anns to Onceaannd (P Sam lm ith er11999866 ). , h re agvieonaboofuSt ou tw th ic Aem th e e ri cian , fl aule th nocue gh ofexEtN re SmOeE fo NrStOhs is , A no urstth ra w li eas , tnooftA ab ulsyt ra ilniatih er e ns influence precipitation in such as that in 1982-3, can dominate the circulation Drosdowsky 1993, F n re d th IendA ia uns tr O al c ia enanw north and and precipitation patterns over tropical South ericksen and i B nt aelrgo ( v e. ign . d , A sis m te e n ri t c ly a . h T ig hhe le r v ea el l -t o im f e sk iflol, resc im as itlsarhtaovethhaatdobatac in oend ­." In Droughts, 63. Routledge, 2016. http://dx.doi.org/10.4324/9781315830896-43.

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"National Drought Mitigation Center for the forty-eight contiguous states in the United States demon­ strated that severe and extreme drought affected more than 25 per cent of the country in twenty-seven o of ft7h5e0p ,0 a 0 st 0omnie2h (1 u , n9d4r2e , d50y0 ea k rs m . 2 T ) h o is rrm ep orrees . ents an area con D tr raosutg to htf lo s o el ddso , m hu rrre ic su an lt ess , inansdtrtuoc rn tu ardaol es d . a m Fo argteh , e s in e reasons, the quantification of impacts and the pro­ vision of disaster relief are far more difficult tasks for A fif lttyho ye uagrhsaT go an , n c ehill’s book was written m drought than they are for other natural hazards. recognising the li omnasteotloogf ists continue to strug o g re le twhiatnhtEommeerdgetnocydem al a in ngagweirtsh , ifm or paecxtasm th p a le t , ar aerestm ru ocrteu ra alccaunsd ­ p cr oiltiecry ia ) m fo ak redresclcaor ntinue tdor ou d g eb hat te a nd th e sc ie bnatsiissts (i a . ned ., lcoocm al m ise udn , i ca re ti sopno nd an in dgttroa ns th peosre ta t e io v n en ts c ha bnynerless , to p ri rnog ­ acc Second, the ab in se gnacneeonfdatopraecdirsoeugahntd . universally vdird in in k g in gemwear te gre , nacnydm so edfiocratlh . s T up h p es li eesc , ha ernascu te r r in is g ti cs sao fe f a it bsoeupttewdh definition of drought adds to the confusion drought have hindered the development of accurate, mu dsetgb re eeeotf her or reg s io ev nerai ty n . oRtneaald is rto ic uag lly h , tdeexfiisntistiaonnds , oiffd it roduogehst , a re nld ia , bl uel , tiamnadtetliym , el tyhee st fiom rm ate u s la o ti fon se voefr it dyraonudgh im tpcaocn ts ­ T th haitshiasvoenbeeeenxpdle an d at iaopnplfiocrattihoens ( coor re im spoafcdt) efsipne it ciio fi ncs . ting Heanzcayrd pl aenvsenbtysm ha ovsetbgeoevnerrnam nk eend ts b . y Bryant (1991) faincaalty io se ndsm tud o y re , th vaenl op 1e5d0 . W de iflihniitte io annsdiGn la th n e tz ir (1 c 9 la 8 ss 5 i ) ­ roannk th in egb is assiusmomftah ri esierdcihnarTaacb te le ri s1t . i1c . sKaenydhiamzp ar adctcsh . aTrh ac is ­ ddeeffiinne it idornosug are annudmemraonuys , mmoarney ex diost. noAtl th ad oeuqguhatteh ly etoefritsh ti ecsdu eg se re defoorftsheivsee ri v ty al , ulaetn io g n th inocf lu edveenatn , e to xtparlesasrieoanlp ar oel ic a y rb m i akers h . t T in hemteharneisnhgofludlstefromrsde fo cl ras ri c n ie gntd is rtosuagnhdteefxfteecn ts t, , tlootnagl -l toesrsm of im li p fe a , ctt , otsauldedceonnnoem ss i , calnod ss , oscoccu ia r­ lteox am sp pelceitfriacryim in pam ct o s st inc as keesy (i e . ceo ., ntohm ey ic ar seecn to orts ) l . i nk FeodrA re lntcheouogfhatshseocriaattiendgshoafzatrhdesvfao ri rou th s ir htayz -a orndesihnazTaarbdlse . pmeor cent , owfnho at r m is atlhperesc ig ip niitfa ic ti aonnceovoefraatphe re ri sohdolodfo th fr7e5ep1r .1 ova id re essuabnjeicnttievge, rattheedoavsesreaslslm ra ennktiosfuh se afzualrdb ec cahuas ra eci ­ tsee spe nctihas ll yormmio sl reea ? d A in gdeffo in r i ti looncao ti fon th sisw ty it phewa ou st lrdonbgetBee ri csatu ic sseoafntdhetihne te nrse it lya , t io dnusrhaitp io s n , baen tw desepna tia hlaezxatredns. t s ty ta p as eos na olfcporm ob ploenm ent of annual precipitation. These of drought events and the magnitude of associated init n io d n in s g an odftthheelcsaocn are kceopft th beytrheo su c se lt f o or fmau la m ti insgunddeefr ­ ­ icm og pean ct t s , a d rg ruom ug ehntt , ra hnokwsevveerry , h th ig aht . t O ot naelc lo asnsmoafke li fe aaop th p e ly rtshce ie dne ti fsitnsito io rndiin sc a ip clt in oenssiw de il rlateivoenntguiavle ly n n to ee dhotwo associated with drought in this case is significantly assessments of impact in u m al uld ti rpoluegh ec tosn it oum ations (e.g., d ov ro e u rr gah te t d . isLo ra srseoifnl if meo th sattsies tt d in ir gesc . t ly T h as esorcain at keidngwib th yrderlo ie ufgphrtogdreacm la m ra e ti s o ) n . s or revocations for eli igcibsie li cttyortso , dBrroyuagnhtt. atT tr h ib is uitses in a lo pspsroopfr ia li tfeesb in ecceau th se eporfim fa a m ry inceautsoe spre Tahdi rd ov , er draoluag rg hetrigmepoagcrtaspha ic re a nonstruct of famine in recent decades has been civil war or that result from other natural haz laradrse . aFtohraneudraamla and political strife, both of which heighten vulnerability to recent analysis of drought occurrence by x th aemp ( lUeg , eassdS) fa yrsotu em ght. mine s . anDdrocu an ghbteeavesnitgsnid fi icsarnutptnaftouord al p tr riogdguecrtifoonr." In Droughts, 36–37. Routledge, 2016. http://dx.doi.org/10.4324/9781315830896-26.

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Conference papers on the topic "Allendale Area (N S W )"

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Emanuele, R. M., and J. Fareed. "THE EFFECT OF MOLECULAR WEIGHT ON THE RELATIVE BIOAVAILABILITY OF HEPARIN." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1644179.

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Three fractions of different molecular weight (M. W.) were obtained from gel-filtration of porcine mucosal heparin. These fractions along with unfractionated and a low M. W. heparin (CY 216) were compared for relative bioavailability in primates (Macaca mulatta: n = 5). The M. W.'s of all fractions were determined using high performance liquid chromatography - gel permeation and characterizied in terms of mean M. W., peak M. W. and M. W. distribution. Area under the plasma concentration time curve (AUC) was calculated by the trapezoidal method after intravenous and subcutaneous administration and used as an index of bioavailability. For the AUC calculations, plasma heparin concentrations were determined using a Xa/IIa clotting assay (Heptest) and individual callibration curves. Using the AUC data, relative bioavailability was calculated using the following formula:Bioavailability = subcutaneous AUC / dose intravenous AUC / dose Significant differences in the bioavailability of the various molecular weight fractions were observed and inversely related to M. W. The highest M. W. fraction (23,000) showed the least bioavailability at 3 %. The bioavailability of the 13,300 M. W. fraction was 9 % while the 5,100 M. W. fraction was 93 % bioavailable. CY 216 (M. W. 5,400) displayed a relative bioavailability of 88 % while unfractionated heparin (M. W. 12,600) was 40 %. The apparent discrepancy in the bioavailability of the unfractionated heparin is likely due to differences in molecular weight distribution.These studies suggest that the M. W. of heparin preparations influences the relative bioavailability. Heparins of lower M. W. exhibit greater relative bioavailability compared to high M. W. preparations. Furthermore, characterization of both mean M. W. and M. W. distribution are necessary for predicting the bioavailability characteristics of heparin. The relationship between relative bioavailability and the M. W. of heparin may help identify low M. W. heparins as a more efficient agent for subcutaneous regimens in the prophylaxis of venous thrombosis.
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Witte, Jan, Daniel Trümpy, and Hans Georg Babies. "The Role of Neo-Tectonics in Oil Migration, Lake Turkana Region, Kenya." In SPE/AAPG Africa Energy and Technology Conference. SPE, 2016. http://dx.doi.org/10.2118/afrc-2574239-ms.

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ABSTRACT Numerous oil seeps have been documented in the Turkana Basin, western Kenya. However, no commercial oil has been found here to date. Recently discovered substantial oil fields in the nearby Lokichar Basin indicate that oil migration can be complex in these rift basins and may pose an exploration risk. We present a new fault and lineament map of the Turkana-Lokichar Basins, integrated with present-day stress data, oil seeps and known prospects. Digital terrain data, satellite images, geological maps, seep and gravity data were integrated into a GIS-database, to superimpose the data and to test it for spatial correlations. Digital terrain data, satellite images, gravity and structural maps were used to conduct detailed mapping of the fault and lineament network. The seep and prospect maps are based on the integration of different public data sources. Four main fault sets are recognized in the basin (~N-S, W-E, NW-SE and SW-NE). Careful analysis of topographic data along both shores of Lake Turkana reveals numerous fault scarps, indicative of recent tectonic activity (particularly the N-S and NW-SE set). The area is presently under NW-SE oriented extension, implying that most of the rift-parallel N-S faults are under oblique dextral transtension. The majority of the documented oil seeps and slicks are found to be associated with rift-parallel faults but also occasionally with the W-E trending set. Recently published neo-tectonic and isostatic uplift data indicate that the highest level of recent fault activity is presently found close to the rift axis and dominantly on the rift-parallel fault sets. We conclude that ~N-S and W-E oriented faults are the most conductive pathways for hydrocarbons in this region under the present-day stress field (and likely throughout the Mio-Pliocene). We further observe that several prospects of the NW-SE trend have seepages associated with them, which could be indicative of breached traps, especially close to the rift axis where faults are most active. Our assessment should help to better understand migration pathways and exploration risks in the Turkana Basin. We encourage explorers to carefully map fault networks, investigate active fault scarps, age-date them where possible, test them for spatial correlation with oil seeps and evaluate them within the context of the present-day stress field. In consequence these workflows will help mitigate exploration risks in the Turkana-Lokichar Basins and similar tectonic settings.
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Krisnabudhi, A. "New Insight Into Berau Sub-Basin North East Borneo: Basin Evolution and Tectonostratigraphy and Their Implication to New Exploration Play Concept." In Digital Technical Conference. Indonesian Petroleum Association, 2020. http://dx.doi.org/10.29118/ipa20-g-489.

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Understanding the evolution of the basin and tectonostratigraphy is the key role to reveal all geological aspects and potential hydrocarbon resources. Northeast Borneo has many hydrocarbon resources especially in Mahakam delta. However, Berau sub-basin remains unclear due to lack of G&G data. This paper presents a new concept of tectonostratigraphy and basin evolution based on subsurface and surface data integrated with thin section as well as radiolaria analysis to determine the age of such basin. Present-day aerogravity data shows that Berau sub-basin has two depocenters trending N-S and E-W and is bordered by Mangkalihat High (MKH) in the south and Rajang Embaluh Group (REG) in the west area. The metamorphic belt in REG area was formed in Early Jurassic (190 Ma), meanwhile in MKH, the ophiolite sequence was formed during Middle-Late Jurassic based on the presence of Holocrptocanium sp. in chert interbedded with mudstone. Based on the analysis, Berau sub-basin experienced subduction to obduction during Early Jurassic to Late Jurassic. In Cretaceous, Berau sub-basin is filled with conglomerate, shale and quartz sandstone of Telen and Benggara Fm. that has provenance from MKH and REG area. In Paleogene, major breakup unconformity can be seen on the seismic section and spread across the basin overlaid by shale with tuff of Eocene-Oligocene Sembakung Fm. The deposition of Sembakung Fm is controlled by extensional regime caused by subduction rollback in NW Borneo. The carbonate sequence has dominated this area in Late Oligocene to Early Miocene. Following the collision of Kuching high in Middle -Late Miocene, the deposition was dominated by deltaic sediment due to regional regression phase. In Plio-Pleistocene period, Berau sub-basin consists of carbonate and deltaic sediment from Domaring and Sajau Fm. In this time structural reactivation and inversion due to transpressional system with SE-NW pattern had controlled Berau sub-basin. Based on the evolution of Berau sub-basin, four hydrocarbon plays are identified in this paper, Mesozoic Play especially in Telen Fm, Paleogene Carbonate Play in Tabbalar & Birang Fm, Middle Miocene Play especially in Latih Fm and Plio-Pleistocene Play in Sajau Fm and Labanan Fm. Working petroleum system in the basin manifested by many oil seeps that can be found in surface and postmortem of several wells data shows commercial to sub-commercial and abundant oil and gas show.
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Whitcomb, Nick, Abdulla Seliem, Rachel Marzen, Bernardo Jose Franco, Maria Agustina Celentano, Sweta Bose, and Alejandra Maldonado Pena. "SE Abu Dhabi Aptian 5 Shuaiba System: Understanding a Heterogeneous Reservoir Trend." In Abu Dhabi International Petroleum Exhibition & Conference. SPE, 2021. http://dx.doi.org/10.2118/207454-ms.

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Abstract The study area covers 1,300 km2 in southeastern Abu Dhabi and focuses on the Aptian (Apt.) 5 Upper Shuaiba progradational clinoform system. The Shuaiba Formation has been well-studied at the regional level, but with comparatively less focus on the Apt. 5 system. Studying depositional trends and shoal facies distributions within the Apt. 5 is critical for predicting reservoir presence and quality. Given the complexity of the Apt. 5 system, understanding the key controls over depositional environments, such as paleowind direction, is an important first step. This study combined regional context and geological understanding with previous studies to confirm existing clinoform interpretation, while also delineating four additional clinoform sequences using a reprocessed depth migrated 3-D seismic volume. Isochron maps were also used to group clinoforms into three packages distinguished by common morphologies possibly linked to their respective dominant reservoir facies. Preliminary observations suggest early clinoforms had more rudist build-ups, whereas the later clinoforms were dominated by narrow-shoal beaches. Coalescing clinoform shoal patterns, observed in the spectral decomposition and amplitude extraction maps, likely result from a combination of Bab Basin morphology, longshore current, and dominant paleowind direction during the Early to Middle Cretaceous. Existing interpretations of dominant paleowind direction vary significantly, ranging between E-W and S-N. Interpretations from this study are most consistent with prevailing paleowind out of the east-southeast. The Arabian plate was likely near the equator around 10°S latitude during the Aptian, which supports the southeast wind hypothesis when considering modern Coriolis patterns. Consistent wind influence on shallow water shoal environments would have winnowed mud and increased the proportion of grain-dominated sediment preserved relative to lower energy areas. The grain-dominated facies appear to be reflected in amplitude responses around the coalescing clinoforms, and in the amplitude variations along strike coincident with clinoform edges. Reservoir presence and quality uncertainty can be reduced if these observations can be confirmed. An improved understanding of the Apt. 5 clinoform system in southeast Abu Dhabi, and possible influences on reservoir distribution and quality, will help develop a better understanding of risk for prospect maturation.
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5

Shi, Xuewen, Yanming Tong, Wenping Liu, Chunduan Zhao, Jia Liu, and Jian Fang. "Full-Scale Fracture System Analysis of Shale Reservoir and its Petroleum Significance." In International Petroleum Technology Conference. IPTC, 2021. http://dx.doi.org/10.2523/iptc-21234-ms.

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Abstract Ascertaining the characteristics of fracture system at different scales integratedly is very important for performing efficient exploration and development activities of specific shale gas reservoirs. In this paper, an area around 250 square kilometers in Changning Block of Sichuan Basin is taken as an example, which belongs to Chinese Shale Gas Development Demonstration Plot. Seismic structural interpretation was performed detailedly based on original seismic amplitude cube and derived edge-detection cubes, and then the technologies of finite element horizon flattening, orthogonal decomposition principal component analysis, seismic discontinuity patch auto-extraction and paleo-stress field inversion were applied, together with the existing regional geological understanding and fracture information in wells, to figure out the staging and grouping of fracture system at seismic scale (i.e., at large and middle scales), at the same time to clarify the regional tectonic evolution and its genetic relationship with fractures at different scales such as the ones revealed by seismic data and cores or image logs. The following conclusions were reached. (a) The tectonic movements affecting the development of fracture system in study interval mainly happened during Yanshanian-Himalayan periods, i.e., 3 compressional tectonic episodes which were nearly in S-N direction in Late Yanshanian period, in NNE-SSW direction in Early Himalayan period, and in NWW-SEE direction in Middle Himalayan period respectively. (b) The Late Yanshanian tectonic event primarily formed long-axis anticlines and synclines, thrust faults and fault-related fractures, all of which were nearly in E-W trending, and fold-related fractures in different directions. (c) The Early Himalayan tectonic event mainly formed genetically related conjugate fracture sets including strike-slip faults and shear fractures both in NNW and NE directions, and transverse extensional fractures. (d) The Middle Himalayan tectonic event chiefly formed thrust faults, and related fractures and folds in NNE~NE direction, and transverse extensional fractures. (e) Furtherly our work demonstrated that such kind of fracture system analysis was of great significance in building discrete fracture network, providing precautionary advice for drilling engineering, and optimizing completion program and field development plan, etc. Hence, integrated fracture system analysis at full scales to reach more meaningful and robust conclusions is essential work for unconventional resources evaluation and characterization.
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