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A limit equilibrium fracture zone model to investigate seismicity in coal mines

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International Journal of Mining Science and Technology 2018年第5期28卷 745-753页

作者： Daniel Malan john Napier Department of Mining Engineering Faculty of Engineering Built Environment and IT University of Pretoria

This paper explores possible synergies between techniques used to minimise seismicity in deep South African gold mines and their applicability to control coal bumps. The paper gives a summary of the techniques used in the deep gold mines and a critical appraisal if these are useful in coal mines. The techniques typically include control of mining rate, preconditioning, optimisation of extraction sequences and centralised blasting. Of particular interest to the coal bump problem is an experimental limit equilibrium fracture zone model implemented in a displacement discontinuity code. This was recently developed for the gold mines to enable the interactive analysis of complex tabular mine layout extraction sequences. The model specifically accommodates energy dissipation computations in the developing fracture zone near the edges of these excavations. This allows the released energy to be used as a surrogate measure of ongoing seismic activity and addresses a number of the weaknesses in the traditional usage of this quantity as a criterion for the design of seismically active layouts. This paper investigates the application of the model to a hypothetical coal longwall layout and the specific problem of coal bumps.

关键词： Coal bumps Limit equilibrium model Mining rate Seismicity

Why does caloric restriction increase life and healthspan? The ‘clean cupboards’ hypothesis

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National Science Review 2020年第7期7卷 1153-1156页

作者： john R.Speakman State Key Laboratory of Molecular Developmental Biology Institute of Genetics and Developmental Biology Chinese Academy of Sciences Institute of Biological and EnvironmentalSciences University of Aberdeen CAS Center of Excellence in Animal Evolution and Genetics Kunming Institute of Zoology Chinese Academy of Sciences

The disposable soma hypothesis explanation of the effects of caloric restriction(CR) on lifespan fails to explain why CR generates negative impacts alongside the positive effects and does not work in all species. I pr...

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A Novel Bio-Controller for Localizing Pollution Sources in a Medium Peclet Environment

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Journal of Bionic Engineering 2010年第4期7卷 345-353页

作者： john Oyekan Huosheng Hu School of Computer Science and Electronic Engineering University of Essex

Nature inspired solutions enable biological systems to adapt and accomplish their tasks in very noisy and uncertain *** inspiration from nature,a novel bacteria controller capable of finding the source of pollution in an underwatermedium turbulent environment is presented in this *** prove that the controller is capable of performing pollutionsource exploration,pollution plume transverse and source declaration in a medium Peclet environment without distinctivelyseparating these three components as most researchers *** results obtained from these experiments are considered asa step towards the deployment of robotic fish in a highly turbulent marine ***,a brief conclusion and futureextension are presented.

关键词： bacterium inspired algorithm environmental monitoring robotic fish medium Peclet environment

Functional origins of the vertebrate cerebellum from a sensory processing antecedent

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Current Zoology 2010年第3期56卷 277-284页

作者： john MONTGOMERY David BODZNICK Leigh Marine Laboratory and School of Biological Sciences University of Auckland Department of Biology Wesleyan University

The structure of the cerebellar cortex is remarkably similar across vertebrate phylogeny. It is well developed in basaljawed fishes, such as sharks and rays with many of the same cell types and organizational features found in other vertebrategroups, including mammals. In particular, the lattice-like organization of cerebellar cortex (with a molecular layer of parallel fibres,interneurons, spiny Purkinje cell dendrites, and climbing fires) is a common defining characteristic. In addition to the cerebellarcortex, fishes and aquatic amphibians have a variety of cerebellum-like structures in the dorso-lateral wall of the *** structures are adjacent to, and in part, contiguous with, the cerebellum. They derive their cerebellum-like name from thepresence of a molecular layer of parallel fibers and inhibitory interneurons, which has striking organizational similarities to themolecular layer of the cerebellar cortex. However, these structures also have characteristics which differ from the cerebellum. Forexample, cerebellum-like structures do not have climbing fibres, and they are clearly sensory. They receive direct afferent inputfrom peripheral sensory receptors and relay their outputs to midbrain sensory areas. As a consequence of this close sensory association,and the ability to characterise their signal processing in a behaviourally relevant context, good progress has been made indetermining the fundamental processing algorithm in cerebellar-like structures. In particular, we have come to understand thecontribution to signal processing made by the molecular layer, which provides an adaptive filter to cancel self-generated noise inelectrosensory and lateral line systems. Given the fundamental similarities of the molecular layer across these structures, coupledwith evidence that cerebellum-like structures may have been the evolutionary antecedent of the cerebellum, we address the question:do both share the same functional algorithm? [Current Zoology 56 (3):

关键词： Origin Vertebrate Cerebellum

Speckle-type POZ protein mutations interrupt tumor suppressor function of speckle-type POZ protein in prostate cancer by affecting androgen receptor degradation

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Asian Journal of Andrology 2014年第5期16卷 659-660页

作者： john Lai Cancer Program Institute of Health and Biomedical Innovation Queensland University of Technology Brisbane Queensland Australia Australian Prostate Cancer Research Centre-Queensland Translational Research Institute Queensland University of Technology Brisbane Queensland Australia

Large scale exome sequencing studies have ＇revealed regions of the genome, which contribute to the castrate resistant prostate cancer （CRPC） phenotype.1-3 Such studies have identified mutations in genes, which may have diagnostic/prognostic potential, or which may be targeted therapeutically. Two of these genes include the androgen receptor （AR） and speckle-type POZ protein （SPOP） genes. However, the findings from these exome sequencing studies can only be translated therapeutically once the functional consequences of these mutations have been determined. Here, we highlight the recent study by An et al.4 which investigated the functional effects of mutations in the SPOP gene that were identified in the aforementioned exome sequencing studies, particnlarly in the context of SPOP-mediated degradation of the AR.

关键词： Speckle-type POZ protein

A review on high performance photovoltaic cells and strategies for improving their efficiency

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Frontiers in Energy 2022年第4期16卷 548-580页

作者： Muni Raj MAURYA john-john CABIBIHAN Kishor Kumar SADASIVUNI Kalim DESHMUKH Mechanical and Industrial Engineering Department College of EngineeringQatar UniversityDoha 2713Qatar Center for Advanced Materials Qatar University Doha 2713Qatar Center for Advanced Materials Qatar UniversityDoha 2713Qatar New Technologies-Research Center University of West BohemiaPlzen 30100Czech Republic

The introduction of a practical solar cell by Bell Laboratory,which had an efficiency of approximately 6%,signified photovoltaic technology as a potentially viable energy *** efforts have been made to increase power conversion efficiency(PCE).In the present review,the advances made in solar cells(SCs)are *** and device engineering are described for achieving enhanced light absorption,electrical properties,stability and higher PCE in *** strategies in materials and coating techniques for large area deposition are further elaborated,which is expected to be helpful for realizing high-efficiency *** methods of lightharvesting in SCs via anti-reflecting coatings,surface texturing,patterned growth of nanostructure,and plasmonics are ***,progress in mechanical methods that are used for sun tracking are *** assistance of the above two protocols in maximizing the power output of SCs are discussed in ***,further research efforts needed to overcome roadblocks in commercialization were highlighted and perspectives on the future development of this rapidly advancing field are offered.

关键词： photovoltaic efficiency large area deposition light harvesting sun tracker

Endoscopic therapy in acute recurrent pancreatitis

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World Journal of Gastroenterology 2008年第7期14卷 1034-1037页

作者： john Baillie Hepatobiliary and Pancreatic Disorders Service Wake Forest University Health SciencesWinston-SalemNorth Carolina 27157United States

Endoscopic retrograde cholangiopancreatography (ERCP) has evolved from a largely diagnostic to a largely therapeutic modality. Cross-sectional imaging, such as computed tomography (CT) and magnetic resonance imaging (MRI), and less invasive endoscopy, especially endoscopic ultrasound (EUS), have largely taken over from ERCP for diagnosis. However, ERCP remains the "first line" therapeutic tool in the management of mechanical causes of acute recurrent pancreatitis, including bile duct stones (choledocholithiasis), ampullary masses (benign and malignant), congenital variants of biliary and pancreatic anatomy (e.g. pancreas divisum, choledochoceles), sphincter of Oddi dysfunction (SOD), pancreatic stones and strictures, and parasitic disorders involving the biliary tree and/or pancreatic duct (e.g Ascariasis, Clonorchiasis).

关键词： Acute pancreatitis Endoscopic retrograde cholangiopancreatography Endoscopic Ultrasound Choledocholithiasis Ampullary lesions Cystic tumors of the pancreas Sphincter of Oddi dysfunction Pancreas divisum Choledochal cyst Pancreatic stones

A fine evolutionary biologist and a consummate gentleman David Burton Wake

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Integrative Zoology 2021年第5期16卷 785-786页

作者： john BUCKERIDGE Professor Emeritus RMIT UniversityMelbourneVictoriaAustralia

Emeritus Professor David Wake,an American herpetologist at the Museum of Vertebrate Zoology,University of California,Berkeley,died peacefully,at his home on Thursday,April 29,at Oakland,*** in Webster,South Dakota,Dave’s interest in nature was kindled by his mother,who taught biology at the local high school,and by his maternal grandfather,Henrik Martinus Solem,who was not only a Lutheran pastor.

关键词： pet evolutionary Berkeley

A light dimmed in Zoological Sciences Emeritus Professor Abraham Haim(5 August 1943 to 30 January 2019)

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Integrative Zoology 2019年第6期14卷 619-620页

作者： john BUCKERIDGE Emeritus RMIT UniversityMelbourneVictoriaAustralia President EmeritusISZS

It is with great sadness that I report the passing of my friend and colleague,Professor Abraham Haim on 30th January *** was born in Tel Aviv on August 5th *** his death,he was Professor Emeritus at the University of Haifa-where in 1978,he began an impressive teaching career,rising in 2010 to both Head of Natural Resources and Environmental Management and Head of the Israeli Centre for Interdisciplinary Research in *** held the latter position at his death,along with Head of the Management Committee of the prestigious Yitzak Shamir Research *** Haim holds a special place in international zoology-not only for his leadership(he was Vice President of the International Society of Zoological Sciences over the period 2008-2016),but for his scientific and environmental systems knowledge.

关键词： holds latter passing