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Domestication Test of Halopegia azurea （Karl Moritz Schumann）（Marantaceae）： Preliminary Study on the Rhizome Cuttings

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Journal of Environmental Science and Engineering(A) 2015年第1期4卷 21-29页

作者： Marie Marguerite Mbolo Abada Jean Ernest Mballa Bimi Josseline landry Douandju Tsonang Pierre Abe Department of Plant Biology Faculty of Science University of Yaounde Yaounde 812 Cameroon

In order to domesticate H. azurea （Halopegia azurea）, acclimatization of rhizome＇s cuttings and young shoots in farms was tested at Nkol Evodo village from February 2012 to June 2012. The best substrate for propagation was assessed：（0） wetland; （1） sand/wetland; （2） sawdust/wetland; （3） sand/sawdust/wetland. Young shoots＇ growth was observed in situ for 8 weeks. A significant difference （P 〈 0.05） was observed in the appearance of young shoots and leaves in nursery. The highest average number of young shoots and leaves （0.62 ± 0.09） was found in substrates 0 and 1, the lowest （0.31 ± 0.08） in substrate 3. Substrate 3 showed the lowest number of young leaves （0.41 ± 0.16） and substrate 2 the highest （0.97 ±0.24）. A significant difference in the mortality rate of cuttings （P 〈 0.05） was observed： 68.75% and 53.12% in substrates 2 and 3, respectively. On farm, new leaves and young shoots＇ appearance showed a highly significant difference. Plants growing in substrates 2 and 3 showed the highest number of leaves. New shoots developed only in plants growing in substrates 0 and 1. These results suggest that it is possible to domesticate H. azurea for leaves＇ production in quantity and quality, and open up better opportunities for its cultivation.

关键词： H. azurea domestication cuttings substrate farm.

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戴维·朗德里波段交易法则

2018年

作者： (美)戴维·朗德里(Dave landry)

本书是从资金管理、技术分析、心理分析三方面围绕波段操作这一主题进行讨论的。先说波段操作，国内有“短线是银”“长线是金”“波段为王”等一些说法，这些归根到底都指的是波段操作，只是操作周期或手法的不同，而实际上它们的原理... 详细信息

ISBN: (数字)9787505743960

本书是从资金管理、技术分析、心理分析三方面围绕波段操作这一主题进行讨论的。先说波段操作，国内有“短线是银”“长线是金”“波段为王”等一些说法，这些归根到底都指的是波段操作，只是操作周期或手法的不同，而实际上它们的原理是相通的，投资者需要根据个人的投资风络、风险偏好、资金规模等多种因素来确定适合自己的投资方法。

关键词：经济财政、金融

来源：汇雅图书（南通市图书馆... 评论

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高压元器件整合简化PoE用电装置设计

今日电子 2007年第6期 79-81页

作者： Phil Callahan Matthew landry Silicon laboratories 公司

自从IEEE Std^TM802．3af以太网络供电（Power—over—Ethernet，PoE）标准于2003年6月通过后，已有数百万台具备PoE功能的VoIP电话、无线接入点（WAP）和安全摄影机在世界各地销售。PoE能够方便地同时提供数据与电源功能，所以许多应... 详细信息

自从IEEE Std^TM802．3af以太网络供电（Power—over—Ethernet，PoE）标准于2003年6月通过后，已有数百万台具备PoE功能的VoIP电话、无线接入点（WAP）和安全摄影机在世界各地销售。PoE能够方便地同时提供数据与电源功能，所以许多应用现在都开始内置这项功能，例如销售点终端装置（POS）、网络传感器和楼宇自动化。以太网络供电设备（PSE）和用电装置（PD）等PoE产品的出货量预计到2008年将超过一亿。

关键词：装置设计 PoE 用电元器件 Ethernet 整合高压 VoIP电话

Stabilization of a Lateric Clay from Burkina Faso with Cement-Metakaolin for an Application in Road Construction

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Journal of Materials Science and Chemical Engineering 2023年第6期11卷 1-20页

作者： Souleymane Sanou Issiaka Sanou Moussa Ouedraogo Halidou Bamogo Lohami Valentin landry Gnoumou Younoussa Millogo Seynou Mohamed Laboratoire de Chimie et Energies Renouvelables (LaCER) Département de Chimie Université Nazi BONI (UNB) Bobo Dioulasso Burkina Faso Laboratoire de Chimie Moléculaire et des Matériaux (LC2M) Département de Chimie Université Joseph KI-ZERBO (UJKZ) Ouagadougou Burkina Faso

The objective of this work is to obtain a composite of clay-cement-metakaolin having good mechanical properties and geotechnical. To do this, a lateritic clay from Burkina Faso referenced ALK was characterized by various methods (X-ray diffraction, infrared spectrometry, thermal analysis and Inductively Coupled Plasma, Atomic Emission Spectrometry) in order to be used as a base course after adding cement and metakaolin. The results of the mineralogical characterization of this clay showed that it is composed of kaolinite (65.7 wt.%), quartz (19.3 wt.%) and goethite (10.8 wt.%). The geotechnical tests carried out showed that ALK is moderately plastic with a plasticity index Ip = 22%. The optimum moisture content and the maximum dry density are respectively 15.9% and 1.76 g∙cm-3. Simple compressive strength and splitting tensile strength are Rc = 1.59 MPa and ft = 0.149 MPa respectively. The California Bearing Ratio (CBR) index at 95% is 40% and above the minimum value of 30% shows that ALK can be used as a sub-base course in road construction. The addition of cement and metakaolin in various proportions improved the CBR index and the mechanical strength of the composites produced. This improvement is due to the formation of hydrated calcium silicate (CSH) resulting from the pozzolanic reaction between the portlandite of the cement and the amorphous silica of the metakaolin. Thus the 2 wt.% metakaolin and 6 wt.% cement formulation with a 95%CBR index of 81% is suitable for the development of a base course in road construction.

关键词： Lateritic Clay Cement Metakaolin Road Construction The California Bearing Ratio Index

ADS-B Reception Error Correction Based on the LSTM Neural-Network Model

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Communications and Network 2023年第2期15卷 25-42页

作者： Jamal Habibi Markani Syed Ibtehaj Raza Rizvi Abdessamad Amrhar Jean-Marc Gagné René Jr. landry Lassena Laboratory Department of Electrical Engineering école de Technologie Supérieure (éTS) Montreal Canada

Standard automatic dependent surveillance broadcast (ADS-B) reception algorithms offer considerable performance at high signal-to-noise ratios (SNRs). However, the performance of ADS-B algorithms in applications can be problematic at low SNRs and in high interference situations, as detecting and decoding techniques may not perform correctly in such circumstances. In addition, conventional error correction algorithms have limitations in their ability to correct errors in ADS-B messages, as the bit and confidence values may be declared inaccurately in the event of low SNRs and high interference. The principal goal of this paper is to deploy a Long Short-Term Memory (LSTM) recurrent neural network model for error correction in conjunction with a conventional algorithm. The data of various flights are collected and cleaned in an initial stage. The clean data is divided randomly into training and test sets. Next, the LSTM model is trained based on the training dataset, and then the model is evaluated based on the test dataset. The proposed model not only improves the ADS-B In packet error correction rate (PECR), but it also enhances the ADS-B In terms of sensitivity. The performance evaluation results reveal that the proposed scheme is achievable and efficient for the avionics industry. It is worth noting that the proposed algorithm is not dependent on conventional algorithms’ prerequisites.

关键词： ADS-B Long Short-Term Memory Packet Error Correction Rate Error Correction Bit Error Rate

电气和电子设备中所使用的阻燃HIPS树脂的报废处理选择方案

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电机电器技术 2002年第6期 9-11页

作者： Susan D.landry 美国雅宝公司

研究电气和电子设备的安全、达标 (包括建议的《废旧电气电子设备》(WEEE)规定和《限制电气及电子设备有害物质》(RoHS)的规定 )以及电气和电子设备 (EEE)报废处理问题。

关键词：电子设备阻燃HIPS树脂电气设备报废处理

Assessment of Indoor Microbial Quality of Library’s Premise: Case of Central Library of the University of YaoundéI

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Open Journal of Preventive Medicine 2018年第4期8卷 109-120页

作者： Kengne Gounmadje landry Nyegue Maximillienne Ascension Djuidje Chatue Ide Armelle Gonsu Kamga Hortense Etoa Francois-Xavier Department of Biochemistry University of YaoundeIYaoundeCameroon Department of Microbiology University of YaoundeIYaoundeCameroon Laboratory of Bacteriology CHUYaoundeCameroon

Background: Good indoor air quality is important for human health and comfort, because people spend a most of their time within buildings. Microbial pollution is a key element of indoor air pollution. Bacteria and fungi growing indoors when sufficient moisture is available usually cause indoor air pollution. Methods: This study was conducted to assess the microbial concentration and to identify the main bacteria and fungi in the indoor environment of Central Library of the University of Yaoundé I. A total of 76 samples were taken from indoor air, surfaces and mouldy books. Bioaerosol sampling and air concentration were made by passive air sampling technique using petri dishes containing different culture media and exposed for 30, 60 and 90 min in the morning and afternoon. Sampling of surfaces and mouldy books were made by rubbing using sterile swab. The identification of the isolated microorganisms was based on macroscopic, microscopic and biochemical characters. Results: The concentrations of bacteria and fungi in the indoor environment of Central Library of the University of Yaoundé I ranged between 747 and 2324 CFU/m for the air and 40 and 500 CFU/cm2 for surfaces. In the examined area, the predominant culturable species of microflora were members of the following bacteria genera;Bacillus spp, Staphylococcus spp, Micrococcus spp, Pseudomonas spp, Rhodococcus spp, Enterobacter spp, Klebsiella spp and Escherichia spp and fungi;Aspergillus spp, Penicillium spp, Curvularia spp, Mucor spp, Cladosporium spp, Candida spp Rhodotorula spp, Fusarium spp, Trichophyton spp, Acremonium spp, Aureobasidium spp, Rhizopus spp and Chrysonilia spp. Conclusion: High concentrations of bacteria and fungi were observed in the central library of the University of Yaoundé I. Precautions and safety measures should be taken to reduce microbial pollution at universities libraries by improving libraries ventilation and disinfection.

关键词： Microbial Pollution Library Identification Fungi Bacteria

Surgical Management of Lumbar and Thoracolumbar Spinal Fractures: Indications, Surgical Technique and Evaluation on a Series of 64 Patients Treated with Percutaneous Posterior Osteosynthesis Combined with Kyphoplasty or Anterior Arthrodesis

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Open Journal of Modern Neurosurgery 2018年第1期8卷 84-100页

作者： Romuald Kouitcheu Drogba landry N’da Hermann Adonis Diallo Moussa Melot Anthony Troude Lucas Roche Pierre-Hugues Department of Neurosurgery CHU-HOPITAL NORDMarseilleFrance Department of Neurosurgery CHU-YOPOUGONAbidjanIvory Coast

Introduction: Fractures of the lumbar spine and thoracolumbar junction are common in spinal trauma. The aim of this work is to analyze the nature of the indications, the morbidity as well as the results of these treatment regimens. Patients and Methods: A retrospective, single-center study, based on a review of 64 patients with lumbar spine and thoracolumbar junction fractures (T10-L2) without neurological disorders, was collected in the neurosurgery department of the North Hospital and University Hospital (CHU), Marseille over a period of 2 years from January 2015 to December 2016. Posterior percutaneous osteosynthesis were more or less associated with kyphoplasty preceded anterior arthrodesis. Clinical and radiological endpoints were collected at least 6 months later. Results: The mean follow-up was 9.5 months (6 - 24). The clinical evaluation found a mean VAS at last follow-up at 14/100 (0 - 30) and an average Oswestry score at the last follow-up at 88%. The initial average vertebral kyphosis went from 13° to 4° at the last follow-up with a correction loss of 1°, an absolute gain of 8°. No postoperative neurological complications were noted in our series. Conclusion: The implementation of a two-step therapeutic strategy with anterior reconstruction in Magerl’s lumbar spine or A3.3 thoracolumbar junction fractures allows effective and long-lasting correction of lumbar lordosis and thoracic kyphosis, and obtaining a balanced spine in the sagittal plane. Our functional results are close to normal, with low morbidity and a low complication rate.

关键词： Anterior Arthrodesis Spine Fracture Kyphoplasty Percutaneous Osteosynthe-sis

Complications of Pregnancy in Patients with Systemic Lupus Erythematosus (Gabon)

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Open Journal of Obstetrics and Gynecology 2015年第8期5卷 443-447页

作者： Sosthène Mayi-Tsonga landry Missounga Josaphat Ibaba Jean Ronald Edoa Jean Baptiste Moussavou Kombila Obstetrics Department Libreville’s Military Hospital Libreville Gabon Department of Internal Medicine Libreville’s Hospital University Libreville Gabon

Pregnancy and systemic lupus erythematosus in black African women: about 10 cases in Libreville (Gabon). Objectives: Through a study in a population of systemic lupus erythematosus (SLE) pregnant black Gabonese women, we describe the characteristics of these pregnancies to clarify their main complications and to make recommendations to their follow-up in low resource countries. Patients and Methods: This is a longitudinal descriptive study conducted over a period of six years, from 1 January 2008 to October 31, 2013, in Libreville (Gabon). We’ve included, systemic lupus erythematosus women carrying a pregnancy during the period of the study. Results: Seventy-two SLE women were followed and were eligible. Only 8 patients (11%) were pregnant during the follow up period. These 8 SLE patients allowed us to monitor 10 pregnancies. The average parity was 0.88. Eight pregnancies in ten (80%) had complications and most frequent was preeclampsia. Nine pregnancies (90%) resulted in the birth of viable children of which 4 (44.4%) were born by caesarean section and the 5 others (55.6%) were born by natural route. Conclusion: We recommend a monthly prenatal care for these high-risk pregnancies and early detection of preeclampsia.

关键词： Systemic Lupus Erythematosus Pregnancy Preeclampsia Gabon