scholarly journals The effect of metakaolin on the durability of concrete hollow blocks used in masonry: evaluation of degradation caused by driving rain

2015 ◽  
Vol 68 (1) ◽  
pp. 21-27 ◽  
Author(s):  
Maria Luiza de Souza Rezende ◽  
José Wallace Barbosa do Nascimento ◽  
Gelmires de Araujo Neves ◽  
Heber Carlos Ferreira
Keyword(s):  
Weight Loss ◽  
Mass Loss ◽  
Cement Content ◽  
Weather Conditions ◽  
The State ◽  
Test Results ◽  
Material Decomposition ◽  
Laboratory Results ◽  
Major Factors ◽  
Driving Rain

Driving rain, considered one of the major factors in the degradation of external seals, may cause esthetic problems and material decomposition to facades and masonry. In the present research, the production of concrete hollow blocks for masonry underwent testing for which 20 years of exposure have been considered, taking into account the annual precipitation in the State of Paraíba. This was assessed by replacing 10, 15 and 20% of cement for metakaolin using as parameter the specimen’s mass loss at end of the test. It has was found that the concrete with metakaolin revealed values of weight loss greater than those of the reference concrete, without metakaolin, and that these values increased as the level of substitution increased. However, for mixtures with lower cement content, the use of 10% by metakaolin promoted results that have been considered similar to the reference. The test results are, therefore, consistent with those reported in literature for assessment studies on actual exposure situations; however, further studies will be developed to correlate the laboratory results obtained and from the resulting exposure to natural weather conditions.

scholarly journals BRIEF EVALUATION OF MASS LOSS INDEX, WATER ABSORPTION AND COMPRESSIVE STRENGTH REVERTIBILITY COEFFICIENTS OF PAPERBRICKS IMMERSED IN WATER

2015 ◽  
pp. 24-30
Author(s):  
Akinwande Abayomi
Keyword(s):  
Weight Loss ◽  
Compressive Strength ◽  
Mass Loss ◽  
Water Absorption ◽  
Cement Content ◽  
Sand Content ◽  
Loss Index

With the need to develop alternative, lightweight cheaper bricks for masonry which will be durable, paperbrick produced with varying cement content of 3 – 18 wt. % and fixed sand content of 20 wt. % were immersed in water for seven days, it was observed that with increasing cement content and curing ages, compressive strength revertibility increased. Weight loss index also reduced with higher cement content and longer curing days and concluded that higher cement content and longer duration periods produce more water durable paperbricks.

scholarly journals Prototipo web para el procesamiento de registros de pacientes potencialmente infectados con tuberculosis en la Huasteca Hidalguense

2019 ◽  
pp. 1-7
Author(s):  
Hermes Salazar-Casanova ◽  
Luis Alberto Mendoza-San Juan ◽  
Ana María Felipe-Redondo
Keyword(s):  
Patient Care ◽  
Real Time ◽  
Specific Treatment ◽  
The State ◽  
Test Results ◽  
Web Engineering ◽  
Care Services ◽  
Laboratory Results ◽  
Web Platform ◽  
The Web

The development of a web prototype for the registration of samples of patients potentially infected with tuberculosis is of great importance because the information generated from the laboratory results must be transmitted in a rapid, truthful and complete manner to the medical units that request them with the purpose of providing a specific treatment according to the diagnosis obtained in the previously analyzed samples. Building a web platform through the Web Engineering methodology allows optimizing the sending of test results so that they can be consulted from any entity authorized by the Secretary of Health of the State of Hidalgo in real time, immediately and without intermediaries to reduce bureaucratic procedures that are delayed, in addition to unreliable. This project was born as a solution to the problems that arise during patient care services, since at this stage is the most difficult to deliver results immediately, an action that contributes to the diagnosis of the disease is carried out late and causing new infections of this disease.

scholarly journals A Conceptual Model of Long-Term Weight Loss Maintenance: The Importance of Cognitive, Empirical and Computational Approaches

2021 ◽  
Vol 18 (2) ◽  
pp. 635
Author(s):  
Darren Haywood ◽  
Blake J. Lawrence ◽  
Frank D. Baughman ◽  
Barbara A. Mullan
Keyword(s):  
Weight Loss ◽  
Weight Loss Maintenance ◽  
Computational Approaches ◽  
Healthy Habits ◽  
Health Related ◽  
The One ◽  
Major Factors ◽  
Positive Social Support ◽  
Weight Loss Interventions

Living with obesity is related to numerous negative health outcomes, including various cancers, type II diabetes, and cardiovascular disease. Although much is known about the factors associated with obesity, and a range of weight loss interventions have been established, changing health-related behaviours to positively affect obesity outcomes has proven difficult. In this paper, we first draw together major factors that have emerged within the literature on weight loss to describe a new conceptual framework of long-term weight loss maintenance. Key to this framework is the suggestion that increased positive social support influences a reduction in psychosocial stress, and that this has the effect of promoting better executive functioning which in turn facilitates the development of healthy habits and the breaking of unhealthy habits, leading to improved ongoing maintenance of weight loss. We then outline how the use of computational approaches are an essential next step, to more rigorously test conceptual frameworks, such as the one we propose, and the benefits that a mixture of conceptual, empirical and computational approaches offer to the field of health psychology.

Factors affecting at-rest lateral stress in artificially cemented sands

1995 ◽  
Vol 32 (2) ◽  
pp. 195-203 ◽  
Author(s):  
Fanyu Zhu ◽  
Jack I. Clark ◽  
Michael J. Paulin
Keyword(s):  
Cement Content ◽  
Vertical Stress ◽  
Specimen Preparation ◽  
Test Results ◽  
Lateral Stress ◽  
Stress History ◽  
Cemented Sand ◽  
Vertical Loading ◽  
Cemented Sands ◽  
Dry Sand

This paper presents the results of a laboratory study on the at-rest lateral stress and Ko of two artificially cemented sands. A modified oedometer ring was used to measure the lateral stress of cemented and uncemented sands. Test materials were No. 3 Ottawa sand and a marine sand with Portland cement. The specimens were prepared using the method of undercompaction to minimize the influence of specimen preparation on test results. The cement contents were 0, 0.5, 1.0, 2.0, 4.0, and 8.0% by the weight of dry sand. The water content of the specimens was 4% of the weight of dry sand and cement. When the sands were cured under zero confining pressure, the test results indicated the following: the at-rest lateral stress in cemented sands decreases significantly with increasing cement content; the relationship between the vertical and at-rest lateral stress is nonlinear and the value of Ko increases with increasing vertical stress; and the lateral stress decreases with sand density and curing period. When the specimens were cured under vertical stress, the value of Ko during the removal of vertical loading increased with both overconsolidation ratio and cement content. Stress history has a significant influence on the behaviour of at-rest lateral stress in cement sands. Key words : cemented sand, Ko, lateral stress, overconsolidation, stress history.

scholarly journals Racial Differences in Relative Skeletal Muscle Mass Loss During Diet-Induced Weight Loss in Women

Obesity ◽  
2018 ◽  
Vol 26 (8) ◽  
pp. 1255-1260 ◽  
Author(s):  
Gary R. Hunter ◽  
David R. Bryan ◽  
Juliano H. Borges ◽  
M. David Diggs ◽  
Stephen J. Carter
Keyword(s):  
Skeletal Muscle ◽  
Weight Loss ◽  
Mass Loss ◽  
Racial Differences ◽  
Muscle Mass ◽  
Skeletal Muscle Mass ◽  
Muscle Mass Loss

Weight Loss and High-Protein, High-Fiber Diet Consumption Impact Blood Metabolite Profiles, Body Composition, Voluntary Physical Activity, Fecal Microbiota, and Fecal Metabolites of Adult Dogs

2021 ◽  
Author(s):  
Thunyaporn Phungviwatnikul ◽  
Anne H Lee ◽  
Sara E Belchik ◽  
Jan S Suchodolski ◽  
Kelly S Swanson
Keyword(s):  
Physical Activity ◽  
Weight Loss ◽  
Body Composition ◽  
Mass Loss ◽  
Fat Mass ◽  
Fecal Microbiota ◽  
Restricted Feeding ◽  
High Fiber ◽  
Voluntary Physical Activity ◽  
Over Time

Abstract Canine obesity is associated with reduced lifespan and metabolic dysfunction, but can be managed by dietary intervention. This study aimed to determine the effects of restricted feeding of a high-protein, high-fiber (HPHF) diet and weight loss on body composition, physical activity, blood metabolites, and fecal microbiota and metabolites of overweight dogs. Twelve spayed female dogs [age: 5.5±1.1 yr; body weight (BW): 14.8±2.0 kg, body condition score (BCS): 7.9±0.8] were fed a HPHF diet during a 4-wk baseline phase to maintain BW. After baseline (wk 0), dogs were first fed 80% of baseline intake and then adjusted to target 1.5% weekly weight loss for 24 wk. Body composition using dual-energy x-ray absorptiometry and blood samples (wk 0, 6, 12, 18, 24), voluntary physical activity (wk 0, 7, 15, 23), and fresh fecal samples for microbiota and metabolite analysis (wk 0, 4, 8, 12, 16, 20, 24) were measured over time. Microbiota data were analyzed using QIIME 2. All data were analyzed statistically over time using SAS 9.4. After 24 wk, dogs lost 31.2% of initial BW and had 1.43±0.73% weight loss per wk. BCS decreased (P<0.0001) by 2.7 units, fat mass decreased (P<0.0001) by 3.1 kg, and fat percentage decreased (P<0.0001) by 3.1 kg and 11.7% with weight loss. Many serum metabolites and hormones were altered, with triglycerides, leptin, insulin, C-reactive protein, and interleukin-6 decreasing (P<0.05) with weight loss. Relative abundances of fecal Bifidobacterium, Coriobacteriaceae UCG-002, undefined Muribaculaceae, Allobaculum, Eubacterium, Lachnospira, Negativivibacillus, Ruminococcus gauvreauii group, uncultured Erysipelotrichaceae, and Parasutterella increased (P<0.05), whereas Prevotellaceae Ga6A1 group, Catenibacterium, Erysipelatoclostridium, Fusobacterium, Holdemanella, Lachnoclostridium, Lactobacillus, Megamonas, Peptoclostridium, Ruminococcus gnavus group, and Streptococcus decreased (P<0.01) with weight loss. Despite the number of significant changes, a state of dysbiosis was not observed in overweight dogs. Fecal ammonia and secondary bile acids decreased, while fecal valerate increased with weight loss. Several correlations between gut microbial taxa and biological parameters were observed. Our results suggest that restricted feeding of a HPHF diet and weight loss promotes fat mass loss, minimizes lean mass loss, reduces inflammatory marker and triglyceride concentrations, and modulates fecal microbiota phylogeny and activity in overweight dogs.

scholarly journals Population vulnerability and disaster risk reduction: A situation analysis among the landslide affected communities in Kerala, India

2010 ◽  
Vol 3 (1) ◽  
Author(s):  
Sunil Damodaran Santha ◽  
Ratheeshkumar Kanjirathmkuzhiyil Sreedharan
Keyword(s):  
Risk Reduction ◽  
Disaster Risk Reduction ◽  
Social Systems ◽  
Disaster Risk ◽  
The State ◽  
Primary Data ◽  
Health Authorities ◽  
Major Factors ◽  
Elected Representatives ◽  
Depth Interviews

Landslides affect at least 15% of the land area of India, exceeding 0.49 million km2. Taking the case of landslide affected communities in the state of Kerala in India, this paper demonstrates that the focus has seldom been placed on assessing and reducing vulnerability. From the perspective of political economy, this paper argues that vulnerability reduction has to be the main priority of any disaster risk reduction programme. This paper also demonstrates that the interactions between ecological and social systems are usually complex and non-linear in nature. In contrast, interventions to tackle landslide risks have followed a linear course, assuming that one hazard event acts independently of another. The key findings of the study show that lack of access to political power, decision making, and resources, insecure livelihoods,environmental degradation, and ine#ectiveness of the state approach to disaster risk reduction are some of the major factors that lead to increasing vulnerability. Qualitative in nature, the primary data were collected through in-depth interviews with people from different groups such as farmers affected by the landslides and secondary floods, men and women living in the temporary shelter, government representatives involved in relief activities, health authorities, and elected representatives.

The life cycle of a feature: modelling the transitions between feature states

2017 ◽  
Vol 34 (8) ◽  
pp. 1229-1251 ◽  
Author(s):  
Raaid Batarfi ◽  
Aziz Guergachi ◽  
M.I.M. Wahab
Keyword(s):  
Life Cycle ◽  
Design Methodology ◽  
Quality Attributes ◽  
The State ◽  
Detailed Model ◽  
Content Type ◽  
Dead State ◽  
Feature Modelling ◽  
Major Factors ◽  
A Current

Purpose Studies have suggested that attributes are dynamic and a life cycle of product and service attributes exists. When an innovative feature is introduced, the feature might attract and delight customers. However, with the passage of time the state of the attractiveness of this feature may change, for better or for worse. The purpose of this paper is to provide a detailed model that shows the factors and related sub-factors that affect the life cycle of a feature and thereby explain the changes that may happen to a feature over time. Design/methodology/approach This model provide detailed explanations of the direct and indirect factors that affect the states of a feature, the ones that affect the rate of adoption, and the ones that trigger the changes between states. The model uses a current-market product’s feature to discuss the effects of these factors on the life cycle of this feature in detail. Findings This paper extends the theory of attractive quality attributes by identified seven states of the feature in its life cycle. These states are as follows: unknown/unimportant state, honey pot state, racing state, required state, standard state, core state, and dead state. This paper also identified eight major factors that affect the transition of the feature from one state to another. These factors include demographic, socioeconomic, behavioural, psychological, geographical, environmental, organisational, and technological factors. Originality/value The findings of this paper provide additional evidence that product and service attributes are dynamic. This paper also increases the validity of the attractive quality attributes theory and the factors that affect the state of the feature in its life cycle. The understanding of the state of the feature in its life cycle, and the factors that influence this change, helps not only in the introduction of completely new features but also in knowing when to remove obsolescent ones.

scholarly journals AGRO-CLIMATIC SUITABILITY AND WATER REQUIREMENT FOR TANZANIA GUINEAGRASS CULTIVATION IN THE STATE OF CEARÁ

2017 ◽  
Vol 30 (4) ◽  
pp. 1028-1038 ◽  
Author(s):  
NAILSON LIMA SANTOS LEMOS ◽  
ANA CLARA RODRIGUES CAVALCANTE ◽  
THIERES GEORGE FREIRE DA SILVA ◽  
JOSÉ RICARDO MACEDO PEZZOPANE ◽  
PATRÍCIA MENEZES SANTOS ◽  
...  
Keyword(s):  
Sandy Soils ◽  
Weather Conditions ◽  
Climatic Conditions ◽  
Water Requirement ◽  
The State ◽  
Climatic Suitability ◽  
Irrigation Water Requirement ◽  
Productive Potential ◽  
Shallow Soils ◽  
Water Holding

ABSTRACT This study aimed to define areas suitable, and the irrigation water requirement for, cultivation of Tanzania guineagrass in the state of Ceará, Brazil. Tanzania guineagrass yield was estimated by a mathematical model, which considers the crop actual evapotranspiration, resulting from the crop climatological water balance. The water requirement throughout the year was estimated for soils with a water holding capacity of 20 (shallow soils), 40 (sandy soils), 60 (soils with medium texture) and 100 mm (clay soils). The relative frequency of occurrence of monthly productions greater than 2,750 kg DM ha-1 month-1 was obtained for different areas in Ceará, representative of most of the state's economic mesoregions. Tanzania guineagrass annual yields in the state of Ceará were between 20,000-30,000 kg DM ha-1 year-1. During the rainy season, the productive potential varies with the economic mesoregion, which presents different climatic conditions. The state of Ceará is only suitable for the rainfed production of Tanzania guineagrass for 4 months each year, predominantly from February to May, while weather conditions do not favor the development of this grass in the remaining months.

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