Effects of temperature and ground-state coherence decay on enhancement and amplification in a Δ\Delta atomic system

We study phase-sensitive amplification of electromagnetically induced transparency in a warm ${}^{85}$Rb vapor wherein a microwave driving field couples the two lower-energy states of a {\Lambda} energy-level system thereby transforming into a {\Delta} system. Our theoretical description includes effects of ground-state coherence decay and temperature effects. In particular, we demonstrate that driving-field-enhanced electromagnetically induced transparency is robust against significant loss of coherence between ground states. We also show that for specific field intensities, a threshold rate of ground-state coherence decay exists at every temperature. This threshold separates the probe-transmittance behavior into two regimes: probe amplification vs probe attenuation. Thus, electromagnetically induced transparency plus amplification is possible at any temperature in a {\Delta} system

Learners With Disabilities Can Contribute to Waste Management

Encouraging the community to shift into a more environmentally friendly practice would entail a consideration of several factors, more so if it includes the participation of individuals with disabilities. The result of the study highlights several actions needed to maximize the potential of the program: 1) the continuous training of learners with disabilities to build capacity and capability; and continuous funding for such; 2) the continuous improvement of product quality to meet specific market needs; and 3) the development of programs to increase the community’s awareness, understanding, and appreciation of the benefits of recycling

Filipino physical therapists’ practice and perspectives on non-treatment physical activity for older adults

Introduction: Studies have already investigated the practice of physical therapists (PTs) in promoting non-treatment physical activity (NTPA). However, these were done in the context of mostly western settings or were not specific to older adult practice. It is still unclear if a similar level of practice and perspectives on NTPA promotion exists in a setting where physical therapy is more associated with rehabilitation than health promotion, such as in the Philippines. Therefore, this study aimed to describe Filipino PTs\u27 knowledge of WHO physical activity (PA) guidelines and their use of behavioral change techniques (BCTs) and theories when promoting PA in older adults. It also explored factors that potentially influenced their engagement in PA promotion. Methods: Filipino PTs who were handling or interested in handling older adult clients from March to April 2020 answered an online/printed survey. Results: More than half of 72 respondents were unaware (59.72%) and most were unable to recall the WHO guidelines (98.61%) correctly. Respondents used a limited range of BCTs when promoting PA. While some (66.66%) were aware of at least one behavior change theory, a number were unfamiliar with all (33.33%) and only a small proportion reported regular use in practice. A number of factors and respondent characteristics were found to have a statistically significant positive relationship with PA promotion. Discussion: Study results can serve as preliminary basis for programs that improve promotion of NTPA on older-adult clients by Filipino PTs, specifically regarding knowledge on WHO PA guidelines and their use of a wide range of BCTs and theories. This can potentially place them at the forefront of addressing this health concern in the aging population

Water Quality Monitoring System Using 3G Network

This paper presents a water quality monitoring system through the acquisition of data parameters such as temperature, pH level, turbidity, and amount of dissolved oxygen. The prototype consists of hardware such as sensors, Gizduino, Raspberry Pi, and 3G Pocket Wifi. Software element includes Raspbian as an operating system, Python as a programming language and MySQL for the database. The power source of the prototype comprises a battery and a solar panel. The testing of the prototype was done in three different bodies of water such as tap water, “Wawa” dam water and “Pasig” river. The raw data gathered from the testing were validated using calibration methods for the temperature sensor and pH sensor while the turbidity sensor follows the ISO 7027 and for the dissolved oxygen parameter, interpolation with the temperature values was computed. Also, the results revealed a minimal standard deviation for each of the parameters for all of the testing done from three bodies of water which validates the consistency of the data gathered. In terms of power supply, no power failure was encountered during the three testing sites. The data from the sensors were also transmitted to the database using MySQL through a 3G network

Drilling constraints on lithospheric accretion and evolution at Atlantis Massif, Mid-Atlantic Ridge 30°N

Author Posting. © American Geophysical Union, 2011. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 116 (2011): B07103, doi:10.1029/2010JB007931.Expeditions 304 and 305 of the Integrated Ocean Drilling Program cored and logged a 1.4 km section of the domal core of Atlantis Massif. Postdrilling research results summarized here constrain the structure and lithology of the Central Dome of this oceanic core complex. The dominantly gabbroic sequence recovered contrasts with predrilling predictions; application of the ground truth in subsequent geophysical processing has produced self-consistent models for the Central Dome. The presence of many thin interfingered petrologic units indicates that the intrusions forming the domal core were emplaced over a minimum of 100–220 kyr, and not as a single magma pulse. Isotopic and mineralogical alteration is intense in the upper 100 m but decreases in intensity with depth. Below 800 m, alteration is restricted to narrow zones surrounding faults, veins, igneous contacts, and to an interval of locally intense serpentinization in olivine-rich troctolite. Hydration of the lithosphere occurred over the complete range of temperature conditions from granulite to zeolite facies, but was predominantly in the amphibolite and greenschist range. Deformation of the sequence was remarkably localized, despite paleomagnetic indications that the dome has undergone at least 45° rotation, presumably during unroofing via detachment faulting. Both the deformation pattern and the lithology contrast with what is known from seafloor studies on the adjacent Southern Ridge of the massif. There, the detachment capping the domal core deformed a 100 m thick zone and serpentinized peridotite comprises ∼70% of recovered samples. We develop a working model of the evolution of Atlantis Massif over the past 2 Myr, outlining several stages that could explain the observed similarities and differences between the Central Dome and the Southern Ridge

Co(II) catalyzed oxidation of organic compounds by peroxomonosulphate

333-344<span style="font-size:9.0pt;mso-bidi-font-size:10.0pt;mso-bidi-font-family: " times="" new="" roman";mso-ansi-language:en-us;mso-bidi-language:ar-sa"="" lang="EN-US">The Co(II) ion catalyzed decomposition of peroxomonosulphate (PMS) and the influence of organic substrates such as ethanol, t-butanol, α-hydroxy acids (AHA) and glycine is studied at pH ≤1.0 and 4.0−5.2. In strong acid medium, the reaction is inhibited by the organic compounds and the present results, in accordance with the earlier reports, suggest a redox process through the formation of sulphate radical intermediate. Ethanol and AHAs are more effective quenchers than t-butanol. However in buffered medium (pH 4.05–5.20), the substrate other than t-butanol catalyze the reaction and get oxidized quantitatively. Ethanol is oxidized in the presence of AHA and glycine, suggesting a molecular mechanism involving a complex intermediate  EtOH-Co(II)-SO and subsequent oxygen atom transfer from SO. The catalytic effect of Co(II) is observed with concentrations of ppm or lower level. </span