scholarly journals Automatization of the Constructive Process: a Systematic Study of the 3D Concrete Printing Technology (Contour Crafting)

2019 ◽  
Author(s):  
Amarildo Verginio Moreira Jr. ◽  
Francielle Coelho dos Santos
Keyword(s):  
Systematic Study ◽  
Printing Technology ◽  
Contour Crafting ◽  
Constructive Process

Quantitative parallel EELS spectrum imaging developed as a new tool in AEM

1992 ◽  
Vol 50 (2) ◽  
pp. 1202-1203
Author(s):  
Gianluigi Botton ◽  
Gilles L'espérance
Keyword(s):  
Statistical Analysis ◽  
Spatial Resolution ◽  
Personal Computer ◽  
Systematic Study ◽  
Present Author ◽  
Chemical Elements ◽  
Detection Limits ◽  
Research Groups ◽  
Quantitative Performance ◽  
Spectrum Imaging

As interest for parallel EELS spectrum imaging grows in laboratories equipped with commercial spectrometers, different approaches were used in recent years by a few research groups in the development of the technique of spectrum imaging as reported in the literature. Either by controlling, with a personal computer both the microsope and the spectrometer or using more powerful workstations interfaced to conventional multichannel analysers with commercially available programs to control the microscope and the spectrometer, spectrum images can now be obtained. Work on the limits of the technique, in terms of the quantitative performance was reported, however, by the present author where a systematic study of artifacts detection limits, statistical errors as a function of desired spatial resolution and range of chemical elements to be studied in a map was carried out The aim of the present paper is to show an application of quantitative parallel EELS spectrum imaging where statistical analysis is performed at each pixel and interpretation is carried out using criteria established from the statistical analysis and variations in composition are analyzed with the help of information retreived from t/γ maps so that artifacts are avoided.

A SYSTEMATIC STUDY OF 2s2 2pk - 2s2pk+l - 2pk+2 TRANSITIONS IN MULTIPLY-CHARGED Cl IONS.

1979 ◽  
Vol 40 (C1) ◽  
pp. C1-208-C1-210 ◽  
Author(s):  
J. P. Forester ◽  
D. J. Pegg ◽  
P. M. Griffin ◽  
G. D. Alton ◽  
S. B. Elston ◽  
...  
Keyword(s):  
Systematic Study ◽  
Multiply Charged

4D printing technology, modern era: A short review

2020 ◽  
pp. 92-111
Author(s):  
Khodadad Mostakim ◽  
Nahid Imtiaz Masuk ◽  
Md. Rakib Hasan ◽  
Md. Shafikul Islam
Keyword(s):  
Smart Materials ◽  
Computer Aided Design ◽  
Short Review ◽  
Stimuli Responsive ◽  
4D Printing ◽  
Space Applications ◽  
Printing Technology ◽  
Practical Applications ◽  
Biomedical Technologies ◽  
Novel Material

The advancement in 3D printing has led to the rapid growth of 4D printing technology. Adding time, as the fourth dimension, this technology ushered the potential of a massive evolution in fields of biomedical technologies, space applications, deployable structures, manufacturing industries, and so forth. This technology performs ingenious design, using smart materials to create advanced forms of the 3-D printed specimen. Improvements in Computer-aided design, additive manufacturing process, and material science engineering have ultimately favored the growth of 4-D printing innovation and revealed an effective method to gather complex 3-D structures. Contrast to all these developments, novel material is still a challenging sector. However, this short review illustrates the basic of 4D printing, summarizes the stimuli responsive materials properties, which have prominent role in the field of 4D technology. In addition, the practical applications are depicted and the potential prospect of this technology is put forward.

Effect of ink and paperboard characteristics on flexographic print quality based on print density

TAPPI Journal ◽  
2011 ◽  
Vol 10 (9) ◽  
pp. 7-13
Author(s):  
KHODADAD MALMIRCHEGINI ◽  
FARSHAD SARKHOSH RAHMANI
Keyword(s):  
Water Absorption ◽  
Significant Influence ◽  
Particle Diameter ◽  
Print Quality ◽  
Printing Technology ◽  
Plastic Films ◽  
Printing Inks ◽  
Packaging Industry ◽  
Solids Content ◽  
Density Results

Flexography is an evolving printing technology that is suitable for printing on coated and uncoated paperboard and board, nonporous substrates including metalized and paperboard foils, and plastic films used especially in the packaging industry. This study evaluated the effect of paperboard and ink characteristics on flexographic print density in paperboard. Three commercial paperboards from different companies were prepared: brown kraft from Thailand, white kraft from Spain, and test liner from Iran. Four samples of process print inks from Iran were used in this investigation. Paperboard properties, such as roughness and water absorption, and ink characteristics, including solids content, PH and particle diameter, were measured. The inks were printed on paperboards using a roll no.15 applicator with a blade metering device, and the print densities were measured. Results showed that solids content, pH, and particle diameter of printing inks influenced print density, while the roughness and water absorption of the three types of paperboard had no significant influence on print density. Results also illustrated that two levels of ink viscosity (25–30 and 50–55 mPa·s) were insignificant to print density.

The solubility of calcium carbonate  in green liquor handling systems

TAPPI Journal ◽  
2019 ◽  
Vol 18 (10) ◽  
pp. 595-602
Author(s):  
ALISHA GIGLIO ◽  
VLADIMIROS G. PAPANGELAKIS ◽  
HONGHI TRAN
Keyword(s):  
Calcium Carbonate ◽  
Systematic Study ◽  
Kraft Pulp ◽  
Thermodynamic Simulation ◽  
Solubility Data ◽  
Pulp Mills ◽  
Persistent Problem ◽  
Green Liquor ◽  
Kraft Pulp Mills ◽  
Salt Systems

The formation of hard calcite (CaCO3) scale in green liquor handling systems is a persistent problem in many kraft pulp mills. CaCO3 precipitates when its concentration in the green liquor exceeds its solubility. While the solubility of CaCO3 in water is well known, it is not so in the highly alkaline green liquor environment. A systematic study was conducted to determine the solubility of CaCO3 in green liquor as a function of temperature, total titratable alkali (TTA), causticity, and sulfidity. The results show that the solubility increases with increased temperature, increased TTA, decreased causticity, and decreased sulfidity. The new solubility data was incorporated into OLI (a thermodynamic simulation program for aqueous salt systems) to generate a series of CaCO3 solubility curves for various green liquor conditions. The results help explain how calcite scale forms in green liquor handling systems.

Hopscotch Modernism: On Everyday Life and the Blurring of Art and Social Science

2006 ◽  
Vol 2 (1) ◽  
pp. 70-79 ◽  
Author(s):  
Ben Highmore
Keyword(s):  
Twentieth Century ◽  
Social Science ◽  
Everyday Life ◽  
Systematic Study ◽  
Cultural Practices ◽  
Health Centre ◽  
Small Scale ◽  
Modernist Literature ◽  
The Everyday ◽  
Point Of Departure

From a remarkably innovative point of departure, Ben Highmore (University of Sussex) suggests that modernist literature and art were not the only cultural practices concerned with reclaiming the everyday and imbuing it with significance. At the same time, Roger Caillois was studying the spontaneous interactions involved in games such as hopscotch, while other small scale institutions such as the Pioneer Health Centre in Peckham, London attempted to reconcile systematic study and knowledge with the non-systematic exchanges in games and play. Highmore suggests that such experiments comprise a less-often recognised ‘modernist heritage’, and argues powerfully for their importance within early-twentieth century anthropology and the newly-emerged field of cultural studies.

PENILAIAN PERFORMA DALAM PEMBELAJARAN SAINS

2014 ◽  
Vol 15 (1) ◽  
pp. 22-30
Author(s):  
R. Dicky Agus Purnama ◽  
Benny Agus Pribadi
Keyword(s):  
Performance Assessment ◽  
Learning Outcome ◽  
Learning Activities ◽  
Learning Science ◽  
Assessment Technique ◽  
Technology Learning ◽  
Constructive Process ◽  
Real World Learning ◽  
Learning Competencies ◽  
Knowledge Exploration

This article will elaborate the use of performance assessment to measure students competencies in learning science. What type of performance assessment appropriate to assess students learning outcome of science? The answer of this question is necessary for the teachers to determine the best assessment technique in science. Basically science can be considered as the root of knowledge and technology. Learning activities in science should be designed in order to facilitate students learning. It is a constructive process which requires students to study concepts inductively. Learning activities in science should be based on constructivism learning theory which encourages students to build their own knowledge and to apply it in the real world. Learning science should involve several essentials activities such as student involvement (engagement); extracting knowledge (exploration); presenting the findings (explanation); understanding knowledge (elaboration); and achievement learning competencies (assessment). It is necessary to implement performance assessment to measure the students learning outcome in science. Penulisan artikel ini bertujuan untuk mengelaborasi implementasi penilaian performa siswa untuk mengukur kemampuan siswa dalam mempelajari isi atau mata pelajaran sains. Bentuk penilaian seperti apa yang diperlukan untuk mengetahui kompetensi siswa setelah mempelajari mata pelajaran sains? Jawaban terhadap pertanyaan ini sangat diperlukan untuk dapat merancang dan mengembangkan sistem penilaian untuk mengukur kemampuan siswa dalam mata pelajaran sains. Sains atau science pada hakekatnya merupakan akar perkembangan ilmu pengetahuan dan teknologi (iptek). Pembelajaran sains pada semua jenjang pendidikan perlu dirancang agar menarik dan bermakna bagi siswa. Aktivitas dalam pembelajaran sains harus memanfaatkan pendekatan dan teori belajar konstruktivistik yang mendorong siswa dapat membangun pengetahuan dan mengaplikasikannya dalam dunia nyata. Pembelajaran sains berbasis teori belajar konstruktivistik bercirikan belajar seperti: Keterlibatan siswa (engagement); penggalian pengetahuan (exploration); penjelasan (explanation); penjabaran (elaboration); dan penilaian (assessment). Dalam aktivitas pebelajaran sains berbasis teori belajar konstruktivistik penilaian hasil belajar menekankan pada performa siswa dalam mengintegrasikan pengetahuan-fenomena alam. Artikel ini akan mengupas implementasi konsep penilaian performa atau performance assessmentdalam pembelajaran sains berbasis teori belajar konstruktivistik.

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