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Formation of efficient dye-sensitized solar cells by introducing an interfacial layer of hierarchically ordered macro-mesoporous TiO_2 film

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Science China Chemistry 2011年第6期54卷 930-935页

作者： HALPERT jonathan E State Key Laboratory of Multi-phase Complex Systems Institute of Process Engineering Chinese Academy of Sciences

Hierarchically ordered macro-mesoporous TiO2 films (Ti-Ma-Me) were fabricated on fluorine-doped tin oxide (FTO) substrates through the confinement self-assembly method. The prepared Ti-Ma-Me possesses periodically ordered structure and a large specific surface area, which was applied as an interfacial layer between the nanocrystalline TiO2 film (P25-TiO2) and FTO electrode in the dye-sensitized solar cell (DSSC). The introduction of a Ti-Ma-Me interfacial layer increased the shortcircuit current density (Jsc) from 7.49 to 10.65 mA/cm2 and the open-circuit voltage (Voc) from 0.65 to 0.70 V as the result of its improved light harvesting efficiency by allowing for the high roughness factor and enhanced multiple internal reflection or scattering as well as reducing the back-transport reaction by blocking direct contact between the electrolyte and FTO electrode. Therefore, the photovoltaic conversion efficiency (η) was improved by 83% from 3.04% to 5.55%, as compared to a device using a bare P25 TiO2 photoanode.

关键词： dye-sensitized solar cells hierarchical ordered macro-mesoporous photoanode

Quantum machine learning

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National Science Review 2019年第1期6卷 26-28页

作者： jonathan Allcock Shengyu zhang Tencent Quantum Laboratory

INTRODUCTION Quantum machine learning is at the crossroads of two of the most exciting current areas of research:quantum computing and classical machine learning. Although the field is still in its infancy,the body of literature is already large enough to warrant several review articles [1–3]. This short survey focuses on a selection of significant recent results on the subtopic of quantum neural net-

关键词： RBM Quantum machine learning

Open Science-A Question of Trust

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Data Intelligence 2021年第1期3卷 64-70页

作者： jonathan Clark The DOI Foundation c/o EDItEURLondon N79DPUnited Kingdom

Collaboration and the sharing of knowledge is at the heart of Open Science(OS).However,we need to know that the knowledge we find and share is really what it purports to be;and we need to know that the authors we hope to collaborate with are really the people they claim to *** this paper,the author argues that a prerequisite for OS is trust and that persistent identifiers help to build that *** persistent identifier systems must themselves be trustworthy and they must be able to connect the user or their machine to the information they need now and into the *** is rather like plumbing:It goes unnoticed and unappreciated until it *** paper puts infrastructure for persistent identifiers in the spotlight as a core component of OS.

关键词： Persistent identifiers Trust Open Science Metadata

Post-Traumatic Palatine Odontogenic Abscess: About 2 Cases

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Open Journal of Stomatology 2024年第7期14卷 336-340页

作者： Aké Lucien jonathan Yapo Bakary Ouattara Koffi Laurent Boka Konan René Kouakou Ahi Morel Mounin Chapo Affoué Linda Marie Pierre Koffi Kahder Morel Diarra Rokiatou Koné-Kamaté Konan Marc Koffi Department of Stomatology Maxillofacial and Facial Plastic Surgery University Hospital of Cocody Abidjan Republic of Cote dIvoire

Introduction: Palatal abscess or cellulitis of dental origin is a rare clinical form of circumscribed cellulitis that can sometimes pose a diagnostic problem. It is the consequence of poor or non-treatment of dental caries or trauma. The aim of this study is to describe the clinical and therapeutic aspects of these two cases of palatal cellulitis of post-traumatic dental origin. Observation: The patients consulted for painful palatal swelling secondary to untreated dental trauma of the 21s. The diagnosis of palatal cellulitis was based on the inflammatory and fluctuating nature of the swelling. A probabilistic bi-antibiotic treatment and an incision and drainage associated with treatment of the portal of entry were carried out. Progression was favourable in both cases. Conclusion: Palatal cellulitis is a rare condition and can be prevented by systematic stomatological consultation after dental trauma. Diagnosis is clinical. However, CT scans are sometimes useful. The course is generally favorable with appropriate treatment.

关键词： Abscess Palate Dental Trauma

Antiproliferative effect of somatostatin analogs in gastroenteropancreatic neuroendocrine tumors

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World Journal of Gastroenterology 2010年第24期16卷 2963-2970页

作者： jonathan Strosberg Larry Kvols H. Lee Moffitt Cancer Center and Research Institute

Somatostatin analogs were initially developed for the control of hormonal syndromes associated with neuro-endocrine tumors (NETs). In recent years, accumul ating data has supported their role as antiproliferative agents, capable of stabilizing tumor growth in patients with metastatic neuroendocrine malignancies, including carci-noid and pancreatic endocrine tumors. A phase Ⅲ, ran-domized, placebo-controlled trial has now demonstrated that octreotide long-acting repeatable (LAR) 30 mg can significantly prolong time to tumor progression among patients with metastatic midgut NETs regardless of functional status, chromogranin A level or age. In addition to signif icantly lengthening time to tumor pro-gression in the overall study population, subset analysis suggests that patients with low tumor burden are most likely to experience disease stabilization with octreotide LAR 30 mg, supporting the early use of octreotide LAR in patients with metastatic disease. Further research efforts are underway to evaluate the use of somatostatin analogs as antiproliferative agents in other types of gastroenteropancreatic-NETs. Ongoing studies are also evaluating novel somatostatin analogs and somatostatin analogs in combination with other anti-tumor therapies.

关键词： Somatostatin analogues Neuroendocrine tumors Antiproliferative

High-resolution geological maps of central London, UK： Comparisons with the London Underground

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Geoscience Frontiers 2016年第2期7卷 273-286页

作者： jonathan D. Paul Department of Earth Sciences Bullard Laboratories University of Cambridge Madingley Rise Cambridge CB3 0EZ UK

This study presents new thickness maps of post-Cretaceous sedimentary strata beneath central London. 〉1100 borehole records were analysed. London Clay is thickest in the west; thicker deposits extend as a narrow finger along the axis of the London Basin. More minor variations are probably governed by periglacial erosion and faulting. A shallow anticline in the Chalk in north-central London has resulted in a pronounced thinning of succeeding strata. These results are compared to the position of London Underground railway tunnels. Although tunnels have been bored through the upper levels of London Clay where thick, some tunnels and stations are positioned within the underlying, more lithologically variable, Lower London Tertiary deposits. Although less complex than other geological models of the London Basin, this technique is more objective and uses a higher density of borehole data. The high resolution of the resulting maps emphasises the power of modelling an expansive dataset in a rigorous but simnle fashion.

关键词： London London Underground London Clay Lambeth Group Chalk Tunnelling Boreholes

Combined effects of fretting and pollutant particles on the contact resistance of the electrical connectors

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Progress in Natural Science:Materials International 2017年第3期27卷 385-390页

作者： zhigang Kong jonathan Swingler Research Laboratory of Electrical Contacts Beijing University of Post and Telecommunications School of Engineering & Physical Sciences Heriot-Watt University

Usually,when electrical connectors operate in vibration environments,fretting will be produced at the contact *** addition,serious environmental pollution particles will affect contact resistance of the *** fretting will worsen the reliability of connectors with the pollutant *** combined effects of fretting and quartz particles on the contact resistance of the gold plating connectors are studied with a fretting test *** results show that the frequencies have obvious effect on the contact *** higher the frequency,the higher the contact resistance *** quartz particles cause serious wear of gold plating,which make the nickel and copper layer exposed quickly to increase the contact *** in high humidity environments,water supply certain adhesion function and make quartz particles easy to insert or cover the contact surfaces,and even cause opening resistance.

关键词： Gold plating Fretting Contact failure Electrical contact

Altaids: accretionary tectonics writ large

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National Science Review 2023年第2期10卷 12-13页

作者： jonathan C.Aitchison School of Earth and Environmental Sciences The University of Queensland

This perspective is written through the lens of someone who,except for a limited but enlightening foray into the region25 years ago,has largely watched the evolution of thinking and understanding of the Altaids from *** area is a hotbed for new ideas and *** strongly held viewpoints associated with various schools of thought have been *** time,international collaboration has moved thinking towards a consensus view,which hopefully will not stifle valuable originality.

关键词： GROWTH COLLAGE

Harnessing migraines for neural regeneration

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Neural Regeneration Research 2018年第4期13卷 609-615页

作者： jonathan M.Borkum Department of Psychology University of Maine Orono ME USA Health Psych Maine Waterville MEUSA

The success of naturalistic or therapeutic neuroregeneration likely depends on an internal milieu that facilitates the survival,proliferation,migration,and differentiation of stem cells and their assimilation into neural *** attacks are an integrated sequence of physiological processes that may protect the brain from oxidative stress by releasing growth factors,suppressing apoptosis,stimulating neurogenesis,encouraging mitochondrial biogenesis,reducing the production of oxidants,and upregulating antioxidant ***,the migraine attack may constitute a physiologic environment conducive to stem *** this paper,key components of migraine are reviewed – neurogenic inflammation with release of calcitonin gene-related peptide（CGRP） and substance P,plasma protein extravasation,platelet activation,release of serotonin by platelets and likely by the dorsal raphe nucleus,activation of endothelial nitric oxide synthase（e NOS）,production of brain-derived neurotrophic factor（BDNF） and,in migraine aura,cortical spreading depression – along with their potential neurorestorative *** possibility is considered of using these components to facilitate successful stem cell *** methods for doing so are discussed,including chemical stimulation of the TRPA1 ion channel,conjoint activation of a subset of migraine components,invasive and noninvasive deep brain stimulation of the dorsal raphe nucleus,transcranial focused ultrasound,and stimulation of the zusanli（ST36） acupuncture point.

关键词： neuroprotection neurorestoration neurogenesis stem cells migraine transient receptor potential ankyrin-1 calcitonin gene-related peptide albumin acupuncture oxidative stress