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1. Estimation of a varying coefficient, fixed-effects Cobb–Douglas production function in levels

Author:
Taining Wang; Daniel J. Henderson
Source:
Economics letters 2022 v.213 pp. 110354
ISSN:
0165-1765
Subject:
logging,   etc   ; elasticities; models; production functions;     Show all 4 Subjects
Abstract:
... We propose a semiparametric varying coefficient estimator for a Cobb–Douglas production function for panel data with several practical features. First, we estimate the model without a log transformation to avoid induced non-negligible estimation bias. Second, we disentangle the impact of traditional inputs from that of environment variables, which impact output indirectly through altering the outp ...
DOI:
10.1016/j.econlet.2022.110354

2. Three-Dimensional Magnetotelluric Characterization of the Travale Geothermal Field (Italy)

Author:
Francesca Pace; Anna Martí; Pilar Queralt; Alessandro Santilano; Adele Manzella; Juanjo Ledo; Alberto Godio
Source:
Remote Sensing 2022 v.14 no.3 pp. -
ISSN:
2072-4292
Subject:
geophysical logging,   etc   ; geophysics; models; tectonics; Italy;     Show all 5 Subjects
Abstract:
... The geoelectrical features of the Travale geothermal field (Italy), one of the most productive geothermal fields in the world, have been investigated by means of three-dimensional (3D) magnetotelluric (MT) data inversion. This study presents the first resistivity model of the Travale geothermal field derived from derivative-based 3D MT inversion. We analyzed MT data that have been acquired in Trav ...
DOI:
10.3390/rs14030542

3. A comparison between different methods to fill gaps in early precipitation series

Author:
Dario Camuffo; Francesca Becherini; Antonio della Valle; Valeria Zanini
Source:
Environmental earth sciences 2022 v.81 no.13 pp. 345
ISSN:
1866-6280
Subject:
logging,   etc   ; application parameters; climatic zones; environmental science; frequency; testing;     Show all 6 Subjects
Abstract:
... The aim of this work is to analyse and compare different methodologies to fill gaps in early precipitation series, and to evaluate which time resolution is reachable, i.e. monthly or daily one. The following methods are applied and tested to fill the 1764–1767 gap in the precipitation series of Padua: (1) using a relationship between monthly amounts and frequencies; (2) transforming a daily log wi ...
DOI:
10.1007/s12665-022-10467-w

4. A Universal Multi-Frequency Micro-Resistivity Array Imaging Method for Subsurface Sensing

Author:
Haining Yang; Yuting Liu; Tingjun Li; Shijia Yi; Na Li
Source:
Remote Sensing 2022 v.14 no.13 pp. -
ISSN:
2072-4292
Subject:
logging,   etc   ; environment; equipment; exhibitions; fields; image analysis; remote sensing;     Show all 7 Subjects
Abstract:
... In this paper, a universal multi–frequency micro-resistivity array imaging (UMMAI) system for subsurface sensing is developed and verified. Different from conventional micro-resistivity imaging equipments, UMMAI is capable to provide high-resolution fullbore formation images in multiple logging environments including an oil-based mud scene, water-based mud scene and water-oil mixed mud scene, owni ...
DOI:
10.3390/rs14133116

5. Constrained 3D gravity interface inversion for layer structures: implications for assessment of hydrocarbon sources in the Ziway-Shala Lakes basin, Central Main Ethiopian rift

Author:
Hailemichael Kebede; Abera Alemu
Source:
Heliyon 2022 v.8 no.7 pp. e09980
ISSN:
2405-8440
Subject:
geophysical logging,   etc   ; Mesozoic era; algorithms; basins; geophysics; gravity; models; sediments; topography;     Show all 9 Subjects
Abstract:
... Multi layer 3D gravity inversion for layered structures and density interfaces are performed in the Central Main Ethiopian rift bounded between 38⁰00′–39⁰30′ E and 7⁰00′–8⁰30′ N. The inversion is carried out in wave number domain using Parker-Oldenburg algorithm and is constrained with initial model information. The previous studies in the region focused on mapping crustal structures and Moho dept ...
DOI:
10.1016/j.heliyon.2022.e09980

6. An Empirical Bayes Method for Chi-Squared Data

Author:
Lilun Du; Inchi Hu
Source:
Journal of the American Statistical Association 2022 v.117 no.537 pp. 334-347
ISSN:
1537-274X
Subject:
logging,   etc   ; Americans; Bayesian theory; data analysis; empirical research; journals; normal distribution; selection methods;     Show all 8 Subjects
Abstract:
... In a thought-provoking paper, Efron investigated the merit and limitation of an empirical Bayes method to correct selection bias based on Tweedie’s formula first reported in the study by Robbins. The exceptional virtue of Tweedie’s formula for the normal distribution lies in its representation of selection bias as a simple function of the derivative of log marginal likelihood. Since the marginal l ...
DOI:
10.1080/01621459.2020.1777137

7. Geological Reservoir Characterization of a Gas Hydrate Prospect Associated with the Hydrate-01 Stratigraphic Test Well, Alaska North Slope

Author:
Machiko Tamaki; Akira Fujimoto; Ray Boswell; Timothy S. Collett
Source:
Energy & fuels 2022 v.36 no.15 pp. 8128-8149
ISSN:
1520-5029
Subject:
geophysical logging,   etc   ; energy; gas hydrate; geophysics; hydrodynamics; prediction; sand; thermodynamics; topographic slope; Alaska;     Show all 10 Subjects
Abstract:
... Geological reservoir characterization is essential for accurate evaluation of gas production performance from gas hydrate reservoirs. Particularly, the understanding of reservoir architecture and heterogeneity is of great importance since these are considered as major controls on fluid hydrodynamic and thermodynamic conditions. This study deals with well log and three-dimensional (3-D) vertical se ...
DOI:
10.1021/acs.energyfuels.2c00336

8. On the Loss of Ectoparasites of Small Mammals Captured in Snap Traps

Author:
N. A. Kocherova; L. A. Bespyatova; S. V. Bugmyrin
Source:
Entomological revue 2022 v.102 no.2 pp. 199-206
ISSN:
0013-8738
Subject:
logging,   etc   ; Ixodes persulcatus; Siphonaptera; death; hosts; lice; parasitic mites; small mammals; trapping; traps;     Show all 10 Subjects
Abstract:
... This paper presents comparative assessment of the timing of host abandonment by different taxa of ectoparasites of small mammals after the host has been captured in a regular snap trap. The data were obtained using a specially designed trap line with automatic logging of the capture time. Our results generally support the basic rule that ectoparasites eventually abandon the dead host. The most tan ...
DOI:
10.1134/S001387382202004X

9. Recent water disposal and pore pressure evolution in the Delaware Mountain Group, Delaware Basin, Southeast New Mexico and West Texas, USA

Author:
Jun Ge; J.-P. Nicot; P.H. Hennings; K.M. Smye; S.A. Hosseini; R.S. Gao; C.L. Breton
Source:
Journal of hydrology 2022 v.40 pp. 101041
ISSN:
2214-5818
Subject:
geophysical logging,   etc   ; Permian period; basins; freshwater; models; oils; tectonics; wastewater; Delaware; New Mexico; Texas;     Show all 11 Subjects
Abstract:
... A flat, large, semi-arid plateau in the southwest United States (west Texas and southeast New Mexico) underlain by a deep Paleozoic sedimentary basin, the tectonic Delaware Basin, host of intensive hydrocarbon production. Impacts of injection of large volumes of water produced from oil and gas wells and injected through 1000 + disposal wells, in particular, pressure buildup, induced seismicity and ...
DOI:
10.1016/j.ejrh.2022.101041

10. Simulation of carbon dioxide mineralization and its effect on fault leakage rates in the South Georgia rift basin, southeastern U.S.

Author:
Adil Alshammari; Venkat Lakshmi; Duke Brantley; Camelia C. Knapp; James H. Knapp
Source:
Heliyon 2022 v.8 no.6 pp. e09635
ISSN:
2405-8440
Subject:
geophysical logging,   etc   ; basins; carbon dioxide; carbonate rocks; computers; geophysics; mineralization; models; permeability; seals; Georgia;     Show all 11 Subjects
Abstract:
... Over the past few decades, measured levels of atmospheric carbon dioxide have substantially increased. One of the ways to limit the adverse impacts of increased carbon dioxide concentrations is to capture and store it inside Earth's subsurface, a process known as CO₂ sequestration. The success of this method is critically dependent on the ability to confine injected CO₂ for up to thousands of year ...
DOI:
10.1016/j.heliyon.2022.e09635

11. Microsite Drivers of Natural Seed Regeneration of Eucalyptus globulus Labill. in Burnt Plantations

Author:
Ana Águas; Hugo Matias; Abel Rodrigues; Tanya Bailey; Joaquim Silva; Francisco Rego
Source:
Forests 2022 v.13 no.6 pp. -
ISSN:
1999-4907
Subject:
salvage logging,   etc   ; Eucalyptus globulus; charcoal; germplasm regeneration; indigenous species; introduced species; phenology; risk; soil pH;     Show all 9 Subjects
Abstract:
... Fire regimes are changing in several regions of the world. In those regions, some exotic species may be better adapted to new regimes than the native species. This study focused on identifying the microsite characteristics associated with the occurrence of post-fire Eucalyptus globulus regeneration from seeds, outside the species native-range. This information is important in helping to assess the ...
DOI:
10.3390/f13060889

12. Assessment of models for velocity distribution in turbulent smooth-wall open channel flows

Author:
Meron Welderufael; Rafik Absi; Yannick Mélinge
Source:
ISH journal of hydraulic engineering 2022 v.28 no.S1 pp. 69-79
ISSN:
2164-3040
Subject:
logging,   etc   ; buffers; differential equation; exhibitions; flow; hydraulic engineering; journals; kinetic energy; methodology; mixing; models; surfaces; viscosity;     Show all 13 Subjects
Abstract:
... This study attempts to provide a more precise and comprehensive model for stream-wise velocities in turbulent smooth-wall open channel flows. Velocity profiles are obtained from the resolution of two ordinary differential equations. The first is derived from the Reynolds-averaged Navier-Stokes (RANS) equation while the second is from the equilibrium between turbulent kinetic energy (TKE) productio ...
DOI:
10.1080/09715010.2019.1677180

13. 3D seismic geomorphology of Early Cenozoic incised channels, Gippsland Basin, SE Australia: Evidence for submarine origin

Author:
E.M. Mahon; M.W. Wallace
Source:
Sedimentary geology 2022 v.430 pp. 106092
ISSN:
0037-0738
Subject:
geophysical logging,   etc   ; Eocene epoch; Istiophoridae; Miozoa; Retaria; basins; coastal plains; geophysics; littoral zone; sediments; tectonics; Australia;     Show all 12 Subjects
Abstract:
... The Latrobe Group in the Gippsland Basin consists of well-developed, stacked shoreface and coastal plain deposits, cut by large, incised channel systems up to 500 m deep. These large channels are conspicuous on seismic intersections and have previously been interpreted as the result of fluvial incision associated with basin inversion/compressional tectonics. Here we have used 3D seismic, well log, ...
DOI:
10.1016/j.sedgeo.2022.106092

14. Petrophysical analysis of well logs and core samples for reservoir evaluation: a case study of southern Issaran Field, Gulf of Suez province, Egypt

Author:
Emad A. Abd El Aziz; Mohamed M. Gomaa
Source:
Environmental earth sciences 2022 v.81 no.12 pp. 341
ISSN:
1866-6280
Subject:
geophysical logging,   etc   ; anhydrite; anisotropy; case studies; dolomite; dolomitic limestone; effective porosity; isotropy; oils; permeability; shale; Egypt;     Show all 12 Subjects
Abstract:
... Understanding basic petrophysical properties may enhance the recovery of residual oil saturation and help in reservoir management. Reservoir oil saturation is the fraction of the porosity of a zone occupied by oil. The trapping may increase with the increase of porosity. Oil reservoirs represent a significant fraction of the reservoirs in the world-wide. We try to make a reservoir evaluation using ...
DOI:
10.1007/s12665-022-10420-x

15. Facies and systems tracts at high-resolution in an organic-rich mudstone: The Duvernay Formation, Kaybob area, Alberta, Canada

Author:
Daniel J. Shaw; Nicholas B. Harris
Source:
Sedimentary geology 2022 v.436 pp. 106157
ISSN:
0037-0738
Subject:
geophysical logging,   etc   ; Devonian period; basins; carbonates; data collection; gravity; models; mudstone; periodicity; sea level; starvation; topography; Alberta;     Show all 13 Subjects
Abstract:
... In organic-rich mudstones, vertical sequences of sedimentary facies record the depositional responses to complex and varying controls: development of accommodation, redox conditions and multiple sources of detrital and biogenic sediments whose flux varies with relative sea-level, and reworking by bottom currents. In this study of the Upper Devonian Duvernay Formation in the Western Canada Sediment ...
DOI:
10.1016/j.sedgeo.2022.106157

16. The depositional model of the Lower Cretaceous Nantun Formation and its implications for oil accumulation in the northern Wuerxun Sag of Hailar Basin, NE China

Author:
Jinxiu Yang; Ying Xia; Jianpeng Yuan; Mark Ireland; Shuangfang Lu; Min Wang; Hang Yu; Yu Li; Mingyue Lu
Source:
Sedimentary geology 2022 v.438 pp. 106208
ISSN:
0037-0738
Subject:
geophysical logging,   etc   ; Cretaceous period; basins; geophysics; models; oils; seals; sediment deposition; sediment transport; sediments; subsidence; tectonics; China;     Show all 13 Subjects
Abstract:
... The northern Wuerxun Sag is a lacustrine rift basin which experienced multiple faulting and subsidence during the Lower Cretaceous. The tectonic evolution with uplifted regions as the provenances caused the complex sedimentary fill of the Lower Cretaceous Nantun Formation. In this paper, we use well log, core and 3D seismic data to characterise the sedimentary facies and depositional environment o ...
DOI:
10.1016/j.sedgeo.2022.106208

17. Gas Hydrate Saturation Estimates, Gas Hydrate Occurrence, and Reservoir Characteristics Based on Well Log Data from the Hydrate-01 Stratigraphic Test Well, Alaska North Slope

Author:
Seth S. Haines; Timothy S. Collett; Jun Yoneda; Naoyuki Shimoda; Ray Boswell; Norihiro Okinaka
Source:
Energy & fuels 2022 v.36 no.6 pp. 3040-3050
ISSN:
1520-5029
Subject:
geophysical logging,   etc   ; clay fraction; energy; gas hydrate; mineralogy; nuclear magnetic resonance spectroscopy; permeability; porosity; sand; sea level; shale; topographic slope; Alaska;     Show all 13 Subjects
Abstract:
... The Hydrate-01 Stratigraphic Test Well was drilled at the Kuparuk 7-11-12 site on the Alaska North Slope in December 2018. Sonic log data provide compressional (P) and shear (S) slowness from which we determine gas hydrate saturation (Sgₕ) estimates using effective medium theory. The sonic Sgₕ estimates compare favorably with Sgₕ estimated from resistivity and nuclear magnetic resonance (NMR) logs ...
DOI:
10.1021/acs.energyfuels.1c04100

18. What drives food security for wildlife in logged and intact forests of tropical Borneo?

Author:
Siew Te Wong; Casey Keat-Chuan Ng
Source:
International journal of biometeorology 2022 v.66 no.4 pp. 753-767
ISSN:
0020-7128
Subject:
logging,   etc   ; Borneo; bioclimatology; food security; fruiting; fruits; phenology; rain; solar radiation; species diversity; stand structure; sustainable forestry; temperature; trees; tropical forests; wildlife;     Show all 16 Subjects
Abstract:
... Timber extraction is often cited as detrimental to wildlife ecology. Little information, however, in particular from the Southeast Asian tropics, is available on how exactly logging affects wildlife food security. To address the gap, this paper presents the first high-resolution comparison of fruit production between logged and intact forests in lowland Borneo. In the period of 2004–2008, dry weig ...
DOI:
10.1007/s00484-021-02234-6

19. Maximizing the Standing Skyline Log Load Using a Variable Length Tagline

Author:
John Sessions; Kevin Lyons; Jeff Wimer
Source:
Forests 2021 v.12 no.7 pp. -
ISSN:
1999-4907
Subject:
logging,   etc   ; cableways; forests; suspensions;     Show all 4 Subjects
Abstract:
... The standing skyline continues to be a common cable logging configuration. In payload analysis it is usually assumed that the tagline (line connecting the logs to the carriage) length is held constant while yarding a turn up the skyline corridor. We show this assumption severely limits the skyline load-carrying capacity for skylines operating with partial suspension. We suggest that smart carriage ...
DOI:
10.3390/f12070927

20. Measuring calibration of likelihood-ratio systems: A comparison of four metrics, including a new metric devPAV

Author:
Peter Vergeer; Yara van Schaik; Marjan Sjerps
Source:
Forensic science international 2021 v.321 pp. 110722
ISSN:
0379-0738
Subject:
logging,   etc   ; forensic sciences; methodology;     Show all 3 Subjects
Abstract:
... Numerical likelihood-ratio (LR) systems aim to calculate evidential strength for forensic evidence evaluation. Calibration of such LR-systems is essential: one does not want to over- or understate the strength of the evidence. Metrics that measure calibration differ in sensitivity to errors in calibration of such systems. In this paper we compare four calibration metrics by a simulation study base ...
DOI:
10.1016/j.forsciint.2021.110722