Persuasive Technology Based on Bodily Comfort Experiences: The Effect of Color Temperature of Room Lighting on User Motivation to Change Room Temperature

2015 ◽  
pp. 83-94 ◽  
Author(s):  
Shengnan Lu ◽  
Jaap Ham ◽  
Cees Midden
Keyword(s):  
Room Temperature ◽  
Persuasive Technology ◽  
Color Temperature ◽  
Motivation To Change ◽  
User Motivation ◽  
Room Lighting

Highly Efficient and Thermally Stable Eu2+-Doped Ca9Nd(PO4)7 Phosphor for Near-Ultraviolet White-Emission LED Applications

2021 ◽  
Vol 21 (12) ◽  
pp. 5859-5866
Author(s):  
Jian Zhou ◽  
Si-Li Ren
Keyword(s):  
Room Temperature ◽  
Green Emission ◽  
Color Temperature ◽  
Multipole Interaction ◽  
Interaction Radius ◽  
Promising Alternative ◽  
Quenching Effect ◽  
Near Ultraviolet ◽  
Great Performance ◽  
Concentration Quenching Effect

Various Eu2+-based Ca9Nd(PO4)7 (CNP:xEu2+, with different x values) materials are prepared via facile solid-state reaction. Their crystal structures are investigated in detail by means of the Rietveld refinement. The structure of CNP:Eu2+ with a trigonal lattice is analogous to that of β-Ca3(PO4)2. Therefore, Eu2+ ions tend to incorporate calcium sites in the host. All the obtained samples can be excited using near ultraviolet (nUV) light to present blue-green emission. An optimal dopant concentration is verified at x = 0.8 with a large critical interaction radius (11.21 Å). The mechanism of the concentration quenching effect is assigned to the multipole-multipole interaction. CNP:xEu2+ possesses a short decay lifetime of ∼60 μs and can endure severe working conditions thanks to its great thermal stability. The relative photoluminescence (PL) intensity of CNP:0.8Eu2+ can retain 84.75% of the pristine intensity measured at room temperature, and the relative intensity remains as high as 69.97% at 423 K. The CNP:Eu2+ phosphors also show great performance in the WLED demonstration. The correlated color temperature (CCT) of the prototype device is 3404 K, with an extremely high Ra (97.6). Therefore, CNP:xEu2+ could be regarded as a promising alternative to blue green phosphors in nUV chip-based WLED applications.

scholarly journals PROTOTYPE PENGENDALIAN DAYA LISTRIK AC DAN LAMPU DENGAN ANALISIS STANDAR KENYAMANAN RUANGAN BERBASIS ATMEGA 2560

2018 ◽  
Vol 5 (2) ◽  
pp. 263
Author(s):  
Made Dwi Krisna Putra Sudiharta ◽  
I Gede Dyana Arjana ◽  
Cok Gede Indra Partha
Keyword(s):  
Control System ◽  
Light Intensity ◽  
Temperature Sensor ◽  
Room Temperature ◽  
Electrical Energy ◽  
Ultrasonic Sensor ◽  
Cooling Systems ◽  
Air Conditioners ◽  
Lighting Control ◽  
Room Lighting

The use of air conditioners (AC) and lighting that do not suit the needs and excessive results in a lack of comfort and high use of electrical energy. Ultrasonic Sensor of SRF-04 functions to find out the number of people in the room, temperature sensor of DHT 22 functions to calculate the temperature and humidity inside and outside the room, Light Intensity sensor of GY-302 functions to read the level of light intensity in the room and micro controller of Arduino Mega 2560 functions to process all input sensors become the command for operating the AC units and lights. The AC and lighting control system working well and can determine the time and number of AC and light that is needed. Those are based by Indonesian room comfort standards so that it can increase the comfort of the room in terms of cooling systems and room lighting with a temperature of 22oC to 25 oC and light intensity of 300 lux.

Study on Luminescent Properties of YAG:Ce3+, Gd3+/La3+ Prepared by Co-Precipitation Method

2014 ◽  
Vol 1002 ◽  
pp. 29-34
Author(s):  
Rong Feng Guan ◽  
Ya Jun You ◽  
Juan Song ◽  
Gui Hua Hou
Keyword(s):  
Emission Intensity ◽  
Room Temperature ◽  
Thermal Quenching ◽  
Luminescent Properties ◽  
Ammonium Bicarbonate ◽  
Color Temperature ◽  
Precipitation Method ◽  
Structure Morphology ◽  
Relative Emission Intensity ◽  
Co Precipitation

The YAG:Ce3+, Gd3+/La3+ yellow phosphors were prepared by co-precipitation method with 0.1mol/L ammonium bicarbonate and aqueous ammonia as precipitants, and the crystal structure, morphology, luminescent properties were investigated. The results indicated that the emission peaks of the YAG:Ce3+, Gd3+/La3+ were redshifted from 535nm to 545.5nm /547nm, and the relative emission intensity declined from 330nm to 145/132 with doping content of Gd3+ /La3+ increased from 0 to 0.9mol at room temperature. Compared with Gd-doping phosphors, the redshift of La3+-doping phosphor was larger and the relative emission intensity declined more quickly. Compared with YAG:Ce3+, the thermal quenching characteristics of YAG:Ce,Gd and YAG:Ce,La were noticeably worse when the temperature increased, but the extents of peak wavelength redshifts were almost the same, about is 7-8nm in the experimental temperature range (50-200°C), have little relation with the doping concentration change. Doping concentrations of Gd or La couldn't be too high, and the suitable concentration was less than 0.6mol at the regulating color temperature and color index.

Room-temperature synthesis, controllable morphology and optical characteristics of narrow-band red phosphor K2LiGaF6:Mn4+

CrystEngComm ◽  
2018 ◽  
Vol 20 (15) ◽  
pp. 2183-2192 ◽  
Author(s):  
Haiming Cheng ◽  
Yan Song ◽  
Feng Hong ◽  
Guixia Liu ◽  
Dan Li ◽  
...  
Keyword(s):  
Room Temperature ◽  
Narrow Band ◽  
Color Temperature ◽  
Temperature Synthesis ◽  
Red Phosphor ◽  
Light Emitting ◽  
Yellow Phosphor ◽  
Red Phosphors ◽  
White Light Emitting Diodes ◽  
Color Rendering

The white light-emitting diodes fabricated by mixing GaN chips with yellow phosphor (Y3Al5O12:Ce3+) and red phosphors (K2LiGaF6:Mn4+) exhibit good performance with lower color temperature and higher color rendering index.

scholarly journals KUALITAS UDARA RUANG PERAWATAN PENYAKIT MENULAR DI RUMAH SAKIT PARU SURABAYA TAHUN 2016

2016 ◽  
Vol 14 (3) ◽  
Author(s):  
Imro’atul Mufidah ◽  
Erna Triastuti ◽  
Ernita Sari
Keyword(s):  
Infectious Disease ◽  
Air Quality ◽  
Room Temperature ◽  
Air Velocity ◽  
Disease Treatment ◽  
Maintenance Process ◽  
Construction Condition ◽  
Bacterial Index ◽  
Room Lighting

Infectious disease treatment rooms are places with a high risk of the transmission of diseases and nosocomial infections. Therefore, there is a need for good environmental quality, either in terms of air quality, and room construction condition, cleaning process and number of occupant density.  The study was a descriptive study aimed at describing the air quality of infectious disease treatment rooms in Lung Hospital Surabaya in 2016. Data were collected by means of observations, interviews, measurements and calculation of the airborne bacterial index.  CFU/m3Results showed that the airborne bacterial index of inpatient rooms was 1030 CFU/m and >2628 CFU/m3 for Dahlia Room 1, Dahlia Room 2 and Pear Room, respectively. Room temperature was 29.8°C, 30.5°C and 30.9C for Dahlia Room 1, Dahlia Room 2 and Pear Room, respectively. Room humidity was 69%, 65% and 65% for Dahlia Room 1, Dahlia Room 2 and Pear Room, respectively. Room air velocity was eligible for Dahlia Room 1 and Dahlia Room 2 at 0.49 m/s and 2 0.18 m/s respectively, but It was not so for Pear Room at 0.89 m/s. Room lighting was 62 lux, 26 lux and 81 lux for Dahlia Room 1, Dahlia Room 2 and Pear Room, respectively. In conclusion, the airborne bacterial index, temperature, humidity and lighting in Lung Hospital Surabaya in 2016 did not meet the requirements as defined in Decree of the Minister of Health No. 1204/Menkes/SK/X/2004 on Hospital Environmental Health Requirements.  It iis recommended to improve the cleaning and maintenance process of those rooms in accordance with health procedures and to improve construction of the rooms which do not meet the requirements.  Keywords : Room air quality, Hospital

Dependence of Intergranular Fracture on Boundary Topography and Cohesion

1973 ◽  
Vol 31 ◽  
pp. 150-151
Author(s):  
J. E. Doherty ◽  
A. F. Giamei ◽  
B. H. Kear ◽  
C. W. Steinke
Keyword(s):  
Grain Boundary ◽  
Room Temperature ◽  
Nickel Base Superalloy ◽  
Boundary Shear ◽  
Room Temperature Ductility ◽  
Solid Solution Matrix ◽  
Nickel Base ◽  
Solution Matrix ◽  
Different Levels ◽  
Base Superalloy

Recently we have been investigating a class of nickel-base superalloys which possess substantial room temperature ductility. This improvement in ductility is directly related to improvements in grain boundary strength due to increased boundary cohesion through control of detrimental impurities and improved boundary shear strength by controlled grain boundary micros true tures.For these investigations an experimental nickel-base superalloy was doped with different levels of sulphur impurity. The micros tructure after a heat treatment of 1360°C for 2 hr, 1200°C for 16 hr consists of coherent precipitates of γ’ Ni3(Al,X) in a nickel solid solution matrix.

Hepatocyte Alterations in Guinea Pigs FED Polychlorinated Biphenyls (PCBs), Dibenzodioxins (PCDD), AND DIBENZOFURANS (PCDF)

1982 ◽  
Vol 40 ◽  
pp. 56-57
Author(s):  
J. N. Turner ◽  
D. N. Collins
Keyword(s):  
Guinea Pigs ◽  
Room Temperature ◽  
Dose Group ◽  
Methyl Cellulose ◽  
Uranyl Acetate ◽  
Target Organ ◽  
Office Building ◽  
Lead Citrate ◽  
Control Groups ◽  
Cooling Fluid

A fire involving an electric service transformer and its cooling fluid, a mixture of PCBs and chlorinated benzenes, contaminated an office building with a fine soot. Chemical analysis showed PCDDs and PCDFs including the highly toxic tetra isomers. Guinea pigs were chosen as an experimental animal to test the soot's toxicity because of their sensitivity to these compounds, and the liver was examined because it is a target organ. The soot was suspended in 0.75% methyl cellulose and administered in a single dose by gavage at levels of 1,10,100, and 500mgm soot/kgm body weight. Each dose group was composed of 6 males and 6 females. Control groups included 12 (6 male, 6 female) animals fed activated carbon in methyl cellulose, 6 males fed methyl cellulose, and 16 males and 10 females untreated. The guinea pigs were sacrificed at 42 days by suffocation in CO2. Liver samples were immediately immersed and minced in 2% gluteraldehyde in cacadylate buffer at pH 7.4 and 4°C. After overnight fixation, samples were postfixed in 1% OsO4 in cacodylate for 1 hr at room temperature, embedded in epon, sectioned and stained with uranyl acetate and lead citrate.

Domain Formation in Synthetic Quartz

1971 ◽  
Vol 29 ◽  
pp. 156-157
Author(s):  
Joseph J. Comer
Keyword(s):  
Electron Beam ◽  
Room Temperature ◽  
Domain Formation ◽  
Synthetic Quartz ◽  
Transmission Electron ◽  
Black Spots ◽  
Diffraction Mode ◽  
Domain Boundaries ◽  
Kikuchi Lines ◽  
Straight Lines

Domains visible by transmission electron microscopy, believed to be Dauphiné inversion twins, were found in some specimens of synthetic quartz heated to 680°C and cooled to room temperature. With the electron beam close to parallel to the [0001] direction the domain boundaries appeared as straight lines normal to <100> and <410> or <510> directions. In the selected area diffraction mode, a shift of the Kikuchi lines was observed when the electron beam was made to traverse the specimen across a boundary. This shift indicates a change in orientation which accounts for the visibility of the domain by diffraction contrast when the specimen is tilted. Upon exposure to a 100 KV electron beam with a flux of 5x 1018 electrons/cm2sec the boundaries are rapidly decorated by radiation damage centers appearing as black spots. Similar crystallographio boundaries were sometimes found in unannealed (0001) quartz damaged by electrons.

A Liquid Nitrogen Cooled Stage for STEM

1974 ◽  
Vol 32 ◽  
pp. 444-445
Author(s):  
Louis T. Germinario
Keyword(s):  
Electron Microscope ◽  
High Resolution ◽  
Liquid Nitrogen ◽  
Room Temperature ◽  
Objective Lens ◽  
Thermal Drift ◽  
Specimen Holder ◽  
Resolution Capability ◽  
Focal Position

A liquid nitrogen stage has been developed for the JEOL JEM-100B electron microscope equipped with a scanning attachment. The design is a modification of the standard JEM-100B SEM specimen holder with specimen cooling to any temperatures In the range ~ 55°K to room temperature. Since the specimen plane is maintained at the ‘high resolution’ focal position of the objective lens and ‘bumping’ and thermal drift la minimized by supercooling the liquid nitrogen, the high resolution capability of the microscope is maintained (Fig.4).

Cryogenic atomic force microscopy

1991 ◽  
Vol 49 ◽  
pp. 54-55
Author(s):  
K. A. Fisher ◽  
M. G. L. Gustafsson ◽  
M. B. Shattuck ◽  
J. Clarke
Keyword(s):  
Room Temperature ◽  
Rapid Freezing ◽  
Cryogenic Temperatures ◽  
Soft Or ◽  
Electrically Conductive ◽  
Force Microscopy ◽  
Flexible Molecules ◽  
Advantages And Disadvantages ◽  
Atomic Force ◽  
Chemical Perturbation

The atomic force microscope (AFM) is capable of imaging electrically conductive and non-conductive surfaces at atomic resolution. When used to image biological samples, however, lateral resolution is often limited to nanometer levels, due primarily to AFM tip/sample interactions. Several approaches to immobilize and stabilize soft or flexible molecules for AFM have been examined, notably, tethering coating, and freezing. Although each approach has its advantages and disadvantages, rapid freezing techniques have the special advantage of avoiding chemical perturbation, and minimizing physical disruption of the sample. Scanning with an AFM at cryogenic temperatures has the potential to image frozen biomolecules at high resolution. We have constructed a force microscope capable of operating immersed in liquid n-pentane and have tested its performance at room temperature with carbon and metal-coated samples, and at 143° K with uncoated ferritin and purple membrane (PM).

Sign in / Sign up

Export Citation Format

Share Document