UNCONVENTIONAL DYNAMIC EFFECTS IN PLASTIC WATER PIPE SYSTEMS

RAMOS HELENA,COVAS DIDIA,ALMEIDA A. B. DE 한국수자원학회 2005 한국수자원학회 학술대회 Vol.2005 No.1

Effects on the Use of Two Textbooks for Four Types of Classes in a South Korean University

Ramos, Ian Done D. The International Promotion Agency of Culture Tech 2013 International Journal of Advanced Culture Technolo Vol.1 No.2

This paper determined students' ranks of difficulty on the use of materials in terms of 1) understanding the layout of the learning materials, 2) reading comprehension of the learning materials, and 3) realization on relevance to needs of the learning materials. It also determined students' 4) rank and frequency of attitude on the materials. With the data gathered through 128 survey questionnaires, 7 focused group discussions, and 10 interviews, the results were found out that there was an inappropriate assessment procedure set by this particular university. The researcher concludes that: 1) design of four types of classes by just using the two textbooks with their respective workbooks is grammar-based with limited conversation activities; 2) placement for these students in one big class size was implemented without considering their common interest and motivation and language levels; and, 3) qualification of teachers teaching these EFL students did not support students' real needs and the language program itself. Content professors who were made to teach may have the ability to input learning, but their teaching styles may differ from the ones who are real English teachers. This paper then recommends that teachers and school administration should have an appropriate placement exam before students attend the class, especially in a big class size. There could only be a few problems among students in one big class size when students' level of competence is proportioned. With this, topics and conversation activities can even be more flexible with the maneuver of art of questioning, various dimensions of thinking, strategic competence, learning attitude or behavior, etc. to ensure sustenance of communicative mode and level of interest and motivation in the classroom. Grammar-based instruction can only be taught when a need arises. Thus, the course description of each class will be able to transact the objectives ready for developing students' communication competence. Moreover, proper measurement can be utilized to validly assess the amount of students' learning and the progress of language curriculum design in terms of materials selection and teaching approach.

Integration of Genome-wide Approaches Identifies lncRNAs of Adult Neural Stem Cells and Their Progeny In Vivo

Ramos, Alexander D.,Diaz, A.,Nellore, A.,Delgado, Ryan N.,Park, K.Y.,Gonzales-Roybal, G.,Oldham, Michael C.,Song, Jun S.,Lim, Daniel A. Cell Press 2013 Cell stem cell Vol.12 No.5

Long noncoding RNAs (lncRNAs) have been described in cell lines and various whole tissues, but lncRNA analysis of development in vivo is limited. Here, we comprehensively analyze lncRNA expression for the adult mouse subventricular zone neural stem cell lineage. We utilize complementary genome-wide techniques including RNA-seq, RNA CaptureSeq, and ChIP-seq to associate specific lncRNAs with neural cell types, developmental processes, and human disease states. By integrating data from chromatin state maps, custom microarrays, and FACS purification of the subventricular zone lineage, we stringently identify lncRNAs with potential roles in adult neurogenesis. shRNA-mediated knockdown of two such lncRNAs, Six3os and Dlx1as, indicate roles for lncRNAs in the glial-neuronal lineage specification of multipotent adult stem cells. Our data and workflow thus provide a uniquely coherent in vivo lncRNA analysis and form the foundation of a user-friendly online resource for the study of lncRNAs in development and disease.

Modeling flow instability of an Algerian sand with the dilatancy rule in CASM

Ramos, Catarina,Fonseca, Antonio Viana da,Vaunat, Jean Techno-Press 2015 Geomechanics & engineering Vol.9 No.6

The aim of the present work was the study of instability in a loose sand from Les Dunes beach in Ain Beninan, Algeria, where the Boumerdes earthquake occurred in 2003. This earthquake caused significant structural damages and claimed the lives of many people. Damages caused to infrastructures were strongly related to phenomena of liquefaction. The study was based on the results of two drained and six undrained triaxial tests over a local sand collected in a region where liquefaction occurred. All the tests hereby analyzed followed compression stress-paths in monotonic conditions and the specimens were isotropically consolidated, since the objective was to study the instability due to static loading as part of a more general project, which also included cyclic studies. The instability was modeled with the second-order work increment criterion. The definition of the instability line for Les Dunes sand and its relation with yield surfaces allowed the identification of the region of potential instability and helped in the evaluation of the susceptibility of soils to liquefy under undrained conditions and its modeling. The dilatancy rate was studied in the points where instability began. Some mixed tests were also simulated, starting with drained conditions and then changing to undrained conditions at different time steps.

소아치과의 새로운 비전 - 우식 없는 건강한 치아를 보존하기 위해: 소아치과에서의 CAMBRA 사용

Ramos-Gomez, Francisco,Kim, Young Jae,Ng, Man-Wai,Yang, Stephanie 대한소아치과학회 2013 大韓小兒齒科學會誌 Vol.40 No.1

최근 2세에서 5세 사이 소아의 우식 발생율이 상당히 증가하고 있다. 유아기우식증(Early Childhood Caries)은 향후 영구치의 우식 발생 가능성에 대한 예측인자이며 사회 저소득층과 다문화 가정 자녀에서 특히 발생빈도가 높은데, 이는 충분히 예방과 관리가 가능하다. 만1세때부터 정기적으로 치과를 방문하고 이 때 우식위험도를 체계적으로 평가하여 환자들에게 맞춤형 예방 전략을 제시할 수 있기 때문이다. 유아기우식증의 예방을 위한 CAMBRA (Caries Management by Risk Assessment)에 대해 가장 최신의 개념과 사용법을 소개하고자 한다. 소아치과의사는 CAMBRA를 통해 개개인의 위험인자를 분석하여 연령에 따른 적절한 예방법을 수립하고 향후 우식 발생시 치료방향의 지침을 정하게 된다. Early childhood caries prevalence has increased significantly in children ages 2~5 years. ECC disproportionately affects lower socioeconomic and minority groups, is a predictor for future decay, but is preventable and manageable. Caries risk assessment systematically derives a patient's caries risk and is important during an infant oral health visit beginning at age 1. Information obtained through a risk assessment can guide a disease management care path tailored to an individual's age and risk to effectively treat and manage one's caries disease process.

Neuro-Fuzzy Modelling and Stable PD Controller for Angular Position in Steering Systems

Ramos-Fernández Julio C.,López-Morales Virgilio,Márquez-Vera Marco A.,Pérez Juan Manual Xicotencatl,Suarez-Cansino Joel 한국자동차공학회 2021 International journal of automotive technology Vol.22 No.6

The precision agriculture and soil tillage are tasks which can be achieved by Automated Tractors (AT) through the integration of several servomechanisms. In order to reach a high autonomy under various work conditions of the AT, control laws’ design and tuning are paramount. The aim of this work is to develop an angle position controller for steering systems applied to an AT. We introduce an automatic electronic steering system by using a fuzzy model, obtained through an Adaptive Neuro-Fuzzy Inference System (ANFIS) algorithm training. A proportional derivative (PD) controller is also tuned through a Takagi-Sugeno fuzzy model (T-S). Furthermore, several closed-loop stability tests were carried out, in numerical simulation and real-time implementation. The feasibility of our methodology is illustrated through the tracking of several angles’ profiles in a real test scenario. For the tracking of a trajectory or several set-points, we have obtained mean errors about 0.6545 and 0.8651 degrees, respectively. Some mechatronic integrations to convert a conventional tractor into a basic Autonomous Agriculture Off-road Tractor (AAOT) are also shown.

Overexpression and secretion of AgaA7 from Pseudoalteromonas hodoensis sp. nov in Bacillus subtilis for the depolymerization of agarose

Ramos, K.R.M.,Valdehuesa, K.N.G.,Cabulong, R.B.,Moron, L.S.,Nisola, G.M.,Hong, S.K.,Lee, W.K.,Chung, W.J. IPC Science and Technology Press ; Elsevier Scienc 2016 Enzyme and microbial technology Vol.90 No.-

<P>Interest in agar or agarose-based pharmaceutical products has driven the search for potent agarolytic enzymes. An extracellular beta-agarase (AgaA7) recently isolated from Pseudoalteromonas hodoensis sp. nov was expressed in Bacillus subtilis, which was chosen due to its capability to overproduce and secrete functional enzymes. Phenotypic analysis showed that the engineered B. subtilis secreted a functional AgaA7 when fused with the aprE signal peptide (SP) at the amino-terminus. The maximum agarolytic activity was observed during the late logarithmic phase. To further improve the secretion of AgaA7, an expression library of AgaA7 fused to different naturally occurring B. subtilis SPs was created. The amount of AgaA7 secreted by the clones was compared through activity assay, immuno-blot, and purification via affinity chromatography. Although the aprE SP can readily facilitate the secretion of AgaA7, other SPs such as yggA, pel, and lipA were relatively more efficient. Among these SPs, lipA was the most efficient in improving the secretion of AgaA7.The use of B. subtilis as host for the expression and secretion of agarolytic and other hydrolytic enzymes can be a useful tool in the field of white biotechnology. (C) 2016 Elsevier Inc. All rights reserved.</P>

Use of inductors in the control of Colletotrichum gloeosporioides and Rhizopus stolonifer isolated from soursop fruits: in vitro tests

Ramos-Guerrero, Anelsy,Gonzalez-Estrada, Ramses Ramon,Hanako-Rosas, Greta,Bautista-Banos, Silvia,Acevedo-Hernandez, Gustavo,Tiznado-Hernandez, Martin Ernesto,Gutierrez-Martinez, Porfirio 한국식품과학회 2018 Food Science and Biotechnology Vol.27 No.3

Soursop (Annona muricata) is a tropical fruit that can be infected by Colletotrichum gloeosporioides and Rhizopus stolonifer. Traditional methods used for postharvest disease control include the application of fungicides, however due to their excessive use, as well as their persistence in the environment, the development of new strategies that control pathogens are required. The application of chitosan (Chi), salicylic acid (SA) and methyl jasmonate (MJ) is an environmentally-friendly alternative with antimicrobial properties and also induces defense mechanisms in plant tissues. In this study, Colletotrichum was reactivated and Rhizopus was identified using morphological features and molecular tools. In vitro, the application of 0.5 and 1.0% of Chi alone or in combination with SA and MJ decreased mycelial growth and sporulation, a complete inhibition of spore germination was obtained. Thus, the application of Chi in combination with SA and MJ could be a smart strategy to inhibit the development of pathogens that attack soursop fruit.

Formation of ghost images due to metal objects on the surface of the patient's face: A pictorial essay

Ramos, Barbara Couto,da Silva Izar, Bruna Raquel,Pereira, Jessica Lourdes Costa,Souza, Priscilla Sena,Valerio, Claudia Scigliano,Tuji, Fabricio Mesquita,Manzi, Flavio Ricardo Korean Academy of Oral and Maxillofacial Radiology 2016 Imaging Science in Dentistry Vol.46 No.1

Panoramic radiographs are a relatively simple technique that is commonly used in all dental specialties. In panoramic radiographs, in addition to the formation of real images of metal objects, ghost images may also form, and these ghost images can hinder an accurate diagnosis and interfere with the accuracy of radiology reports. Dentists must understand the formation of these images in order to avoid making incorrect radiographic diagnoses. Therefore, the present study sought to present a study of the formation of panoramic radiograph ghost images caused by metal objects in the head and neck region of a dry skull, as well as to report a clinical case in order to warn dentists about ghost images and to raise awareness thereof. An understanding of the principles of the formation of ghost images in panoramic radiographs helps prevent incorrect diagnoses.

The effect of mechanical properties of bone in the mandible, a numerical case study

Ramos, Antonio,Marques, Hugo,Mesnard, Michel Techno-Press 2014 Advances in biomechanics & applications Vol.1 No.1

Bone properties are one of the key components when constructing models that can simulate the mechanical behavior of a mandible. Due to the complexity of the structure, the tooth, ligaments, different bones etc., some simplifications are often considered and bone properties are one of them. The objective of this study is to understand if a simplification of the problem is possible and assess its influence on mandible behavior. A cadaveric toothless mandible was used to build three computational models from CT scan information: a full cortical bone model; a cortical and cancellous bone model, and a model where the Young's modulus was obtained as function of the pixel value in a CT scan. Twelve muscle forces were applied on the mandible. Results showed that although all the models presented the same type of global behavior and proximity in some locations, the influence of cancellous bone can be seen in strain distribution. The different Young's modulus defined by the CT scan gray scale influenced the maximum and minimum strains. For modeling general behavior, a full cortical bone model can be effective. However, when cancellous bone is included, maximum values in thin regions increase the strain distribution. Results revealed that when properties are assigned to the gray scale some peaks could occur which did not represent the real situation.