Results 31 to 40 of about 912,950 (301)

Textural Properties Of Rock For Penetration Rate Prediction

Daffodil International University Journal of Science and Technology, 1970
Abstract: The relationship between textural properties of selected Nigeria rocks and penetration rate of top-hole hammer drill was investigated. These rock samples were tested in the laboratory for mineral composition, silica content and porosity. Also, average grain size and packing density were determined from photomicrograph of the samples using ...
Adebayo, B., Akande, J.M.
openaire   +2 more sources

Toy Models for Galaxy Formation versus Simulations [PDF]

, 2013
We describe simple useful toy models for key processes of galaxy formation in its most active phase, at z > 1, and test the approximate expressions against the typical behaviour in a suite of high-resolution hydro-cosmological simulations of massive ...
Cacciato, M., Ceverino, D., Dekel, A., Primack, J. R., Tweed, D., Zolotov, A.   +5 more
core   +1 more source

Well-seismic joint data-driven resistivity-based prediction of 3D spatial rate of penetration

Frontiers in Earth Science
Accurate rate of penetration (ROP) prediction is important for optimizing drilling parameters, selecting drilling tools, improving drilling efficiency, and reducing operation cost.
Yangfei Yu, Yangfei Yu, Shouceng Tian, Jianguo Li, Lingzhan Zou, Gang Liu, Pengfei Li, Wei Zhou, Yang Lu   +8 more
doaj   +1 more source

Numerical evaluation of the pipe-pile buckling during vibratory driving in sand [PDF]

, 2019
The buckling of steel pipe piles during vibratory driving is numerically studied using the Multi-Material Arbitrary Lagrangian-Eulerian (MMALE) method. This method handles the large soil deformations that occur during pile driving and other geotechnical ...
Aubram, Daniel, Bakroon, Montaser, Daryaei, Reza, Rackwitz, Frank   +3 more
core   +1 more source

Analysis and research on the constant-rate penetration mechanism of the seabed cone penetration test system

Frontiers in Mechanical Engineering, 2023
The seabed Cone Penetration Test (CPT) system is a common method for investigating offshore soil. This paper focuses on a new subsea CPT method for assessing physical and mechanical properties of marine sediments. The new method enables automatic docking
Ziqiang Ren, Ziqiang Ren, Jiawang Chen, Jiawang Chen, Jin Guo, Jin Guo, Bijin Liu, Xiaohui Hu, Xiaohui Hu, Hang Zhou, Hang Zhou, Houhong Liu, Feng Gao, Feng Gao   +13 more
doaj   +1 more source

Psychosocial Outcomes in Patients With Endocrine Tumor Syndromes: A Systematic Review

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Introduction The combination of disease manifestations, the familial burden, and varying penetrance of endocrine tumor syndromes (ETSs) is unique. This review aimed to portray and summarize available data on psychosocial outcomes in patients with ETSs and explore gaps and opportunities for future research and care.
Daniël Zwerus, Floortje Strobbe, Annemarie A. Verrijn Stuart, Hanneke M. van Santen, Gerlof D. Valk, Sasja A. Schepers, Rachel S. van Leeuwaarde   +6 more
wiley   +1 more source

DEVELOPMENT OF OIL WELL MONITORING AND CONTROL SYSTEM

Academy Journal of Science and Engineering, 2022
Kick is an unplanned and undesirable influx of formation fluid into the borehole which if not curtailed, may develop into a blowout. It may arise if the formation fluid flows into the wellbore in an unplanned fa shion when the drilling mud hydrostatic ...
E. J. Atajeromavwo, G. B. Iwasokun, O. C. Akinyokun, A.O Adetunbi   +3 more
doaj  

Changes in Body Composition in Children and Young People Undergoing Treatment for Acute Lymphoblastic Leukemia: A Systematic Review and Meta‐Analysis

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Ongoing evidence indicates increased risk of sarcopenic obesity among children and young people (CYP) with acute lymphoblastic leukemia (ALL), often beginning early in treatment, persisting into survivorship. This review evaluates current literature on body composition in CYP with ALL during and after treatment.
Lina A. Zahed, Raquel Revuelta Iniesta, Mary Fewtrell, Julie Lanigan, Breeana Gardiner, Graeme O'Connor   +5 more
wiley   +1 more source

Predicting Chronicity in Children and Adolescents With Newly Diagnosed Immune Thrombocytopenia at the Timepoint of Diagnosis Using Machine Learning‐Based Approaches

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Objectives To identify predictors of chronic ITP (cITP) and to develop a model based on several machine learning (ML) methods to estimate the individual risk of chronicity at the timepoint of diagnosis. Methods We analyzed a longitudinal cohort of 944 children enrolled in the Intercontinental Cooperative immune thrombocytopenia (ITP) Study ...
Severin Kasser, Alice Bizeul, Meera Chitlur, Hugo Donato, Jelena Roganovic, Julia E. Vogt, Thomas Kühne   +6 more
wiley   +1 more source

Evidence for a Bulk Complex Order-Parameter in Y0.9Ca0.1Ba2Cu3O7-delta Thin Films

, 2004
We have measured the penetration depth of overdoped Y0.9Ca0.1Ba2Cu3O7-delta (Ca-YBCO) thin films using two different methods. The change of the penetration depth as a function of temperature has been measured using the parallel plate resonator (PPR ...
Anderson P. W., B Gorshunov, Bernhard C., Dressel M., E Farber, Farber E., Friedel J., G Deutscher, Kozlov G., M Dressel, Sachdev S., Sangiovanni G., Skinta J. A.   +12 more
core   +1 more source