A Study on the Correlation between Change in the Geometrical Dimension of a Free-Falling Molten Glass Gob and Its Viscosity

To produce flawless glass containers, continuous monitoring of the glass gob is required. It is essential to ensure production of molten glass gobs with the right shape, temperature, viscosity and weight. At present, manual monitoring is common practice in the glass container industry, which heavily depends on previous experience, operator knowledge and trial and error. This results in inconsistent measurements and consequently loss of production. In this article, a multi-camera based setup is used as a non-invasive real-time monitoring system. We have shown that under certain conditions, such as keeping the glass composition constant, it is possible to do in-line measurement of viscosity using sensor fusion to correlate the rate of geometrical change in the gob and its temperature. The correlation models presented in this article show that there is a strong correlation, i.e., 0.65, between our measurements and the projected viscosity.

Activist Learners’ Creative Thinking Processes in Posing and Solving Geometry Problem

<p style="text-align: justify;">This study aimed to describe the creative thinking process of students with active learning styles in proposing and solving problems on geometry material. The research instruments were Honey and Mumford's Learning Style Questionnaire (LSQ), problem-solving and submission test sheets, and interview guidelines. The LSQ questionnaire was distributed to students majoring in mathematics education at a university in Malang, Indonesia, with a total of 200 students. Students who have an active learning style and meet the specified criteria will be selected as research subjects. Based on research on creative thinking processes in proposing and solving problems in students with active learning styles, it was found that there were differences in behaviour between subject 1 and subject 2 at each stage of creative thinking. However, based on the researcher's observations of the behaviour of the two subjects at each stage of their thinking, there are similarities in behaviour, namely, they tend to be in a hurry to do something, prefer trial and error, and get ideas based on daily experience.</p>

Science Learning Training Using Information Technology in The Covid-19 Pandemic

The Covid-19 pandemic has a direct impact on the environment of society, both regarding aspects of knowledge and aspects of problem solving which are all trial and error or speculative on various things, as a result in the world of education it is also inseparable from various problems, so that not a few end up leading to conflicts or debate. This community service program (PKM) is aimed at SMA Muhammadiyah Pangandaran teachers with the aim of being able to help solve problems, especially those related to the Teaching and Learning Process in the form of networks (online) in the field of science learning. For this reason, it is necessary to have a technology device that can help teaching and learning activities, especially internet-based information technology applications, with the hope that the online teaching and learning process can take place as it should. and motivate teachers to teach. The results of this PKM activity are in the form of increased motivation or enthusiasm for teaching and additional insight into the use of Information Technology (IT) in carrying out the On Line-based Teaching and Learning Process. In conclusion, the PKM which was appointed under the title Science Learning Training Using Information Technology in the Covid-19 Pandemic Period provided an adequate contribution to 32 SMA Muhammadiyah Pangandaran teachers as training participants.

Fabrication of an Immobilized Polyelectrolite Complex (PEC) Membrane from Pectin-Chitosan and Chromoionophore ETH 5294 for pH-Based Fish Freshness Monitoring

Considering the significance of its demand around the world, the accurate determination of fish freshness with a simple and rapid procedure has become an interesting issue for the fishing industry. Hence, we aimed to fabricate a new optical pH sensor based on a polyelectrolyte (PEC) membrane of pectin–chitosan and the active material chromoionophore ETH 5294. A trial-and-error investigation of the polymer compositions revealed that the optimum ratio of pectin to chitosan was 3:7. With an optimum wavelength region (λ) at 610 nm, the constructed sensor was capable of stable responses after 5 min exposure to phosphate-buffered solution. Furthermore, the obtained sensor achieved optimum sensitivity when the PBS concentration was 0.1 M, while the relative standard deviation values ranged from 2.07 to 2.34%, suggesting good reproducibility. Further investigation revealed that the sensor experienced decreased absorbance of 16.67–18.68% after 25 days of storage. Employing the optimum conditions stated previously, the sensor was tested to monitor fish freshness in samples that were stored at 4 °C and ambient temperature. The results suggested that the newly fabricated optical sensor could measure pH changes on fish skin after 25 h storage at room temperature (pH 6.37, 8.91 and 11.02, respectively) and 4 °C (pH 6.8, 7.31 and 7.92, respectively).

An ancestral genomic sequence that serves as a nucleation site for de novo gene birth

A short non-coding sequence present between the gamma-glutamyltransferase 1 (GGT1) and gamma-glutamyltransferase 5 (GGT5) genes, termed a spacer sequence has been detected in the genomes of Mus musculus, the house mouse and in Philippine tarsier, a primitive ancestral primate. It is highly conserved during primate evolution with certain sequences being totally invariant from mouse to humans. Evidence is presented to show this intergenic sequence serves as a nucleation site for the initiation of diverse genes. We also outline the birth of the human lincRNA gene BCRP3 (BCR activator of RhoGEF and GTPase 3 pseudogene) during primate evolution. The gene developmental process involves sequence initiation, addition of a complex of tandem transposable elements and addition of a segment of another gene. The sequence, initially formed in the Old World Monkeys such as the Rhesus monkey (Macaca mulatta) and the baboon (Papio anubis), develops into different primate genes before evolving into the human BCRP3 gene; it appears to also include trial and error during sequence/gene formation. The protein gene, GGT5 may have also formed by spacer sequence initiation in an ancient ancestor such as zebrafish, but spacer and GGT5 gene sequence drift during evolution produced a divergence that precludes further assessment.

Information technologies of teaching in a secondary school

The conference participants are offered components of the educational and methodological complex in physics, which are obtained not by advanced pedagogical experience, ie by trial and error, but by detailed and complete analysis and calculation of structures and algorithms of the educational process in secondary school and its individual components. It is a guide for students, systematization of educational information, algorithm for solving physical problems, solving standard physical problems on a computer, diagnosing student performance and rating assessment of knowledge.

Comparativa de características de software para la creación de recorridos virtuales 360 en Web

The use of 360 virtual tours has become a technology that allows viewing from different angles, places, or spaces that, due to various circumstances, it is not possible to visit physically. Due to different restrictions existing today; of a physical, economic or health type, virtual visits to museums, archaeological sites, parks, and facilities of various kinds have become an alternative to disseminate, promote, or bring users closer to places, that through 360 panoramic images, make them feel immersed in them. Currently, creating a 360 virtual tour is available to more people, as the software and hardware tools used are increasingly accessible. However, deciding on the most appropriate software platform to publish virtual tours on the web can be a trial-and-error process, delaying obtaining these virtual products.

Relaxed Skolam Mean Labeling of 5 – Star Graphs with Partition 3, 2

In this article, our main topic is about the existence of relaxed skolem mean labeling for a 5 – star graph G = K1,α ∪ K1,α ∪ K1,α ∪ K1, β ∪ K1, β 1 2 3 1 2 with partition 3, 2 with a certain condition. By using the trial and error method we find the existence of the relaxed skolam mean labeling of 5 - star graph with partition 3, 2 with a specific condition.

Relaxed Skolam Mean Labeling of 6 – Star Graphs with Partition 3, 3

Existence Relaxed skolam mean labeling for a 6 – star graph 3 G = K1,α K1,α K1,α K1,β K1,β K1,β 1 2 3 1 2 ∪ ∪ ∪ ∪ ∪ with partition 3,3 with a certain condition is the core topic of the following article. Trial and error method is used to find the existence of the relaxed skolam mean labeling of 6 - star graph with partition 3, 3 holding a specific condition.

3D Printing and Implementation of Digital Twins: Current Trends and Limitations

Fabricating objects with desired mechanical properties by utilizing 3D printing methods can be expensive and time-consuming, especially when based only on a trial-and-error test modus operandi. Digital twins (DT) can be proposed as a solution to understand, analyze and improve the fabricated item, service system or production line. However, the development of relevant DTs is still hampered by a number of factors, such as a lack of full understanding of the concept of DTs, their context and method of development. In addition, the connection between existing conventional systems and their data is under development. This work aims to summarize and review the current trends and limitations in DTs for additive manufacturing, in order to provide more insights for further research on DT systems.