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Assessing Joint Simulation and Estimation Approaches in Geometallurgical Modeling

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Journal of Geoscience and Environment Protection 2025年第1期13卷 316-330页

作者： Farzaneh Khorram Gabriel Pais manuel Reyes Facultad de Ingeniera Universidad Andres Bello Santiago Chile

Given that energy costs are a significant component of overall processing costs in mineral plants, reducing these costs through process optimization or technology adoption enhances the technical and financial feasibility of a deposit. Geometallurgical modeling plays a key role in understanding the relationship between material characteristics, mine planning, and processing stages, ultimately contributing to more efficient resource management and cost reduction in mineral processing. This study aims to develop a block model for evaluating comminution energy consumption (CEC) and identifying blocks with the highest energy usage potential during the grinding process in a specified region. Therefore, by applying advanced geostatistical techniques, including joint estimation and simulation based on geometallurgical data from multiple mineral processing stages, we predict CEC across the study area. The dataset encompasses 2.754 drill samples and a block model with 4.680 blocks. In this effort, imulation techniques, such as Plurigaussian and Turning Bands, provided more realistic outcomes than cokriging, considering the unique characteristics of geometallurgical data and the limitations of kriging methods.

关键词： Geometallurgy Multivariate Analysis Plurigaussian Turning Band Method Cokriging

Cerebral cortex contributions to Parkinson's disease tremor:what exactly generates the tremor?

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Neural Regeneration Research 2025年第12期20卷 3535-3536页

作者： manuel Bange Hao Ding Muthuraman Muthuraman Informatics for Medical Technology Institute of Computer ScienceUniversity AugsburgAugsburgGermany Department of Neurology Neural Engineering with Signal Analytics and Artificial Intelligence(NESA-AI)University Clinic WürzburgWürzburgGermany

Pathological tremor is one of the cardinal symptoms in Parkinson's disease (PD).Tremor is comprised of involuntary,rhythmic,a nd oscillating movements that can vary according to the circumstances under which they occur,the body parts that are involved,and the frequency at which they *** example,tremors can be mild to severe,are stress sensitive,and can affect arms,legs,or the head (Dirkx and Bologna,2022).

关键词： tremor cortex exactly

Differential response of injured and healthy retinas to syngeneic and allogeneic transplantation of a clonal cell line of immortalized olfactory ensheathing glia:a double-edged sword

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Neural Regeneration Research 2025年第8期20卷 2395-2407页

作者： María Norte-Muñoz María Portela-Lomba Paloma Sobrado-Calvo Diana Simón Johnny Di Pierdomenico Alejandro Gallego-Ortega Mar Pérez JoséMCabrera-Maqueda Javier Sierra manuel Vidal-Sanz María Teresa Moreno-Flores Marta Agudo-Barriuso Grupo de Investigación Oftalmología Experimental Departamento de OftalmologíaOptometríaOtorrinolaringología y Anatomía PatológicaFacultad de MedicinaUniversidad de MurciaInstituto Murciano de Investigación Biosanitaria(IMIB)Campus de Ciencias de la SaludMurciaSpain Experimental Sciences Faculty Universidad Francisco de VitoriaPozuelo de AlarcónMadridSpain Anatomy Histology and Neuroscience DepartmentMedicine FacultyUniversidad Autónoma de MadridMadridSpain Center of Neuroimmunology Service of NeurologyLaboratory of Advanced Imaging in Neuroimmunological DiseasesHospital Clínic of BarcelonaInstitut d’Investigacions Biomèdiques August Pi i Sunyer(IDIBAPS)and Universitat de BarcelonaBarcelonaSpain Medicine Faculty Universidad Francisco de VitoriaPozuelo de AlarcónMadridSpain

Olfactory ensheathing glia promote axonal regeneration in the mammalian central nervous system,including retinal ganglion cell axonal growth through the injured optic ***,it is unknown whether olfactory ensheathing glia also have neuroprotective *** ensheathing glia express brain-derived neurotrophic factor,one of the best neuroprotectants for axotomized retinal ganglion ***,we aimed to investigate the neuroprotective capacity of olfactory ensheating glia after optic nerve *** ensheathing glia cells from an established rat immortalized clonal cell line,TEG3,were intravitreally injected in intact and axotomized retinas in syngeneic and allogeneic mode with or without microglial inhibition or immunosuppressive *** and gene expression analyses were *** bulb-derived primary olfactory ensheathing glia and TEG3 express major histocompatibility complex classⅡ*** and syngenically transplanted TEG3 cells survived in the vitreous for up to 21 days,forming an *** axotomized retinas,only the allogeneic TEG3 transplant rescued retinal ganglion cells at 7 days but not at 21 *** these retinas,microglial anatomical activation was higher than after optic nerve crush *** intact retinas,both transplants activated microglial cells and caused retinal ganglion cell death at 21 days,a loss that was higher after allotransplantation,triggered by pyroptosis and partially rescued by microglial inhibition or ***,neuroprotection of axotomized retinal ganglion cells did not improve with these *** different neuroprotective properties,different toxic effects,and different responses to microglial inhibitory treatments of olfactory ensheathing glia in the retina depending on the type of transplant highlight the importance of thorough preclinical studies to explore these variables.

关键词： cell therapy immune recognition major histocompatibility complex class II(MHCII) neuroprotection olfactory ensheathing glia retinal ganglion cells

Synthesis and functionalization of carbon xerogels to be used as supports for fuel cell catalysts

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Journal of Energy Chemistry 2013年第2期22卷 195-201页

作者： Jos L. figueiredo manuel F. R. Pereira Laboratory of Catalysis and Materials Associate Laboratory LSRE/LCM Faculdade de Engenharia Universidade do Porto Rua Dr. Roberto Frias 4200-465 Porto Portugal

The synthesis and properties of carbon xerogels are briefly described in this mini-review, emphasizing the methods used for tuning their surface chemistry and textural properties in order to design efficient electrocatalysts for fuel cells. In particular, the role played by the surface functional groups in determining the loading, dispersion, oxidation state and stability of the metal phases is addressed.

关键词： carbon xerogels fuel cells electrocatalysts surface chemistry catalyst supports

The uPA/uPAR system in astrocytic wound healing

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Neural Regeneration Research 2022年第11期17卷 2404-2406页

作者： manuel Yepes Division of Neuropharmacology and Neurologic Diseases Yerkes National Primate Research CenterAtlantaGAUSA Department of Neurology Emory University School of MedicineAtlantaGAUSA Department of Neurology Veterans Affairs Medical CenterAtlantaGAUSA

The repair of injured tissue is a highly complex process that involves cell prolife ration,differentiation,and *** migration requires the dismantling of intercellular contacts in the injured zone and their subsequent reconstitution in the wounded ***-type plasminogen activator(u PA)is a serine proteinase found in multiple cell types including endothelial cells,smooth muscle cells,monocytes,and macrophages.A substantial body of experimental evidence with different cell types outside the central nervous system indicates that the binding of uPA to its receptor(uPAR)on the cell surface prompts cell migration by inducing plasmin-mediated degradation of the extracellular *** contrast,although uPA and uPAR are abundantly found in astrocytes and u PA binding to uPAR triggers astrocytic activation,it is unknown if uPA also plays a role in astrocytic *** cadherin is a member of cell adhesion proteins pivotal for the formation of cell-cell conta cts between *** specifically,while the extracellular domain of neuronal cadherin interacts with the extracellular domain of neuronal cadherin in neighboring cells,its intracellular domain binds toβ-catenin,which in turn links the complex to the actin cytos *** synthase kinase 3βis a serine-threonine kinase that prevents the cytoplasmic accumulation ofβ-catenin by inducing its phosphorylation at Ser33,Ser37,and Ser41,thus activating a sequence of events that lead to its proteasomal *** data discussed in this perspective indicate that astrocytes release u PA following a mechanical injury,and that binding of this u PA to uPAR on the cell membrane induces the detachment ofβ-catenin from the intracellular domain of neuronal cadherin by triggering its extracellular signal-regulated kinase 1/2-mediated phosphorylation at ***,this is followed by the cytoplasmic accumulation ofβ-catenin because uPA-induced extracellular signalregulated kinase 1/2 activ

关键词： astrocytes lipoprotein receptor-related protein 6 plasmin urokinase receptor urokinase-type plasminogen activator Wnt-β-catenin pathway wound healing β-catenin

The plasminogen activating system in the pathogenesis of Alzheimer’s disease

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Neural Regeneration Research 2021年第10期16卷 1973-1977页

作者： manuel Yepes Department of Neurology Emory University School of MedicineAtlantaGAUSA Department of Neurology Veterans Affairs Medical CenterAtlantaGAUSA Division of Neuropharmacology and Neurologic Diseases Yerkes National Primate Research CenterAtlantaGAUSA

Dementia is a clinical syndrome that affects approximately 47 million people worldwide and is characterized by progressive and irreversible decline of cognitive,behavioral and sesorimotor ***’s disease(AD)accounts for approximately 60–80%of all cases of dementia,and neuropathologically is characterized by extracellular deposits of insoluble amyloid-β(Aβ)and intracellular aggregates of hyperphosphorylated ***,although for a long time it was believed that the extracellular accumulation of Aβwas the culprit of the symptoms observed in these patients,more recent studies have shown that cognitive decline in people suffering this disease is associated with soluble Aβ-induced synaptic dysfunction instead of the formation of insoluble Aβ-containing extracellular *** observations are translationally relevant because soluble Aβ-induced synaptic dysfunction is an early event in AD that precedes neuronal death,and thus is amenable to therapeutic interventions to prevent cognitive decline before the progression to irreversible brain *** plasminogen activating(PA)system is an enzymatic cascade that triggers the degradation of fibrin by catalyzing the conversion of plasminogen into plasmin via two serine proteinases:tissue-type plasminogen activator(tPA)and urokinase-type plasminogen activator(uPA).Experimental evidence reported over the last three decades has shown that tPA and uPA play a role in the pathogenesis of ***,these studies have focused on the ability of these plasminogen activators to trigger plasmin-induced cleavage of insoluble Aβ-containing extracellular *** contrast,recent evidence indicates that activity-dependent release of uPA from the presynaptic terminal of cerebral cortical neurons protects the synapse from the deleterious effects of soluble Aβvia a mechanism that does not require plasmin generation or the cleavage of Aβ*** we discuss the role of the PA system in the pathogenesis of AD and

关键词： Alzheimer’s disease amyloid precursor protein amyloidβ neuroserpin plasmin plasminogen activating system plasminogen activator inhibitor-1 synapse tissue-type plasminogen activator urokinase-type plasminogen activator

Positive curvature, symmetry, and topology

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Frontiers of Mathematics in China 2016年第5期11卷 1099-1122页

作者： manuel AMANN Fakultat fur Mathematik Institut fiir Algebra und Geometrie Karlsruher Institut fiir Technologie Englerstraβe 2 76131 Karlsruhe Germany

We depict recent developments in the field of positive sectional curvature, mainly, but not exclusively, under the assumption of isometric torus actions. After an elaborate introduction to the field, we shall discuss various classification results, before we provide results on the computation of Euler characteristics. This will be the starting point for an examination of more involved invariants and further techniques. In particular, we shall discuss the Hopf conjectures, related decomposition results like the Wilhelm conjecture, results in differential topology and index theory as well as in rational homotopy theory, geometrically formal metrics in positive curvature and much more. The results we present will be discussed for arbitrary dimensions, but also specified to small dimensions. This survey article features mainly depictions of our own work interest in this area and cites results obtained in different collaborations; full statements and proofs can be found in the respective original research articles.

关键词： Positive sectional curvature torus actions Euler characteristic Hopf conjecture index theory Wilhelm conjecture geometric formality

Urokinase-type plasminogen activator is a modulator of synaptic plasticity in the central nervous system:implications for neurorepair in the ischemic brain

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Neural Regeneration Research 2020年第4期15卷 620-624页

作者： manuel Yepes Division of Neuropharmacology and Neurologic Diseases Yerkes National Primate Research Center Department of Neurology Emory University School of Medicine Department of Neurology Veterans Affairs Medical Center

The last two decades have witnessed a rapid decrease in mortality due to acute cerebral ischemia that paradoxically has led to a rapid increase in the number of patients that survive an acute ischemic stroke with various degrees of ***,the lack of an effective therapeutic strategy to promote neurological recovery among stroke survivors has led to a rapidly growing population of disabled ***,understanding the mechanisms of neurorepair in the ischemic brain is a priority with wide scientific,social and economic *** ischemia has a harmful effect on synaptic structure associated with the development of functional *** agreement with these observations,experimental evidence indicates that synaptic repair underlies the recovery of neurological function following an ischemic ***,it has become evident that synaptic plasticity is crucial not only during development and learning,but also for synaptic repair after an ischemic *** plasminogen activating system is assembled by a cascade of enzymes and their inhibitors initially thought to be solely involved in the generation of ***,recent work has shown that in the brain this system has an important function regulating the development of synaptic plasticity via mechanisms that not always require plasmin ***-type plasminogen activator(uPA)is a serine proteinase and one of the plasminogen activators,that upon binding to its receptor(uPAR)not only catalyzes the conversion of plasminogen into plasmin on the cell surface,but also activates cell signaling pathways that promote cell migration,proliferation and *** role of uPA is the brain is not fully ***,it has been reported while uPA and uPAR are abundantly found in the developing central nervous system,in the mature brain their expression is restricted to a limited group of ***,following an ischemic injury to the mature brain the expressio

关键词： cerebral ischemia neurorepair plasminogen plasticity stoke synapse urokinase urokinase receptor

Some Open Problems Related to Creative Telescoping

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Journal of Systems Science & Complexity 2017年第1期30卷 154-172页

作者： CHEN Shaoshi KAUERS manuel Key Laboratory of Mathematics Mechanization Academy of Mathematics and Systems ScienceChinese Academy of Sciences Institute for Algebra J. Kepler University Linz

Creative telescoping is the method of choice for obtaining information about definite sums or integrals. It has been intensively studied since the early 1990s, and can now be considered as a classical technique in computer algebra. At the same time, it is still a subject of ongoing *** paper presents a selection of open problems in this context. The authors would be curious to hear about any substantial progress on any of these problems.

关键词： Computer algebra creative telescoping differential algebra linear operators ore algebras symbolic integration symbolic summation.