Portrait of an Etruscan Athletic Official: A Multi-Analytical Study of a Painted Terracotta Wall Panel

The Getty’s Etruscan painted terracotta wall panel, Athletic Official, recently has been speculated to be associated with a Caeretan wall panel depicting a Discobolus based on a shared iconography. To better understand the materials and techniques used to create the Getty panel and investigate its relation to extant Etruscan painted terracotta panels, a multi-analytical study was conducted, using broadband visible, IR, and UV imaging, along with scanning MA-XRF, FORS, Raman, SEM-EDS, and XRD analytical techniques. The analytical results together with PCA analysis suggest the clay support of the Getty panel is most similar in composition to that of panels from Cerveteri. A manganese black was identified in the decorative scheme; not commonly employed, this appears to be an important marker for the workshop practice in Cerveteri. Most significantly, the use of MA-XRF scanning allowed for invisible ruling lines on the Athletic Official, presumably laid down at the earliest stages of the creation of the panel, to be visualized. Taken together, the results of this study provide new insights into Caeretan workshop practice as well as provide a framework for better understanding the design and execution of Etruscan polychromy.

Discerning the painter’s hand: machine learning on surface topography

Attribution of paintings is a critical problem in art history. This study extends machine learning analysis to surface topography of painted works. A controlled study of positive attribution was designed with paintings produced by a class of art students. The paintings were scanned using a chromatic confocal optical profilometer to produce surface height data. The surface data were divided into virtual patches and used to train an ensemble of convolutional neural networks (CNNs) for attribution. Over a range of square patch sizes from 0.5 to 60 mm, the resulting attribution was found to be 60–96% accurate, and, when comparing regions of different color, was nearly twice as accurate as CNNs using color images of the paintings. Remarkably, short length scales, even as small as a bristle diameter, were the key to reliably distinguishing among artists. These results show promise for real-world attribution, particularly in the case of workshop practice.

Motion Magnification of Vibration Image in Estimation of Technical Object Condition-Review

One of the most important features of the proper operation of technical objects is monitoring the vibrations of their mechanical components. The currently significant proportion of the research methods in this regard includes a group of research methods based on the conversion of vibrations using sensors providing data from individual locations. In parallel with the continuous improvement of these tools, new methods for acquiring information on the condition of the object have emerged due to the rapid development of visual systems. Their actual effectiveness determined the switch from research laboratories to actual industrial installations. In many cases, the application of the visualization methods can supplement the conventional methods applied and, under particular conditions, can effectively replace them. The decisive factor is their non-contact nature and the possibility for simultaneous observation of multiple points of the selected area. Visual motion magnification (MM) is an image processing method that involves the conscious and deliberate deformation of input images to the form that enables the visual observation of vibration processes which are not visible in their natural form. The first part of the article refers to the basic terms in the field of expressing motion in an image (based on the Lagrangian and Eulerian approaches), the formulation of the term of optical flow (OF), and the interpretation of an image in time and space. The following part of the article reviews the main processing algorithms in the aspect of computational complexity and visual quality and their modification for applications under specific conditions. The comparison of the MM methods presented in the paper and recommendations for their applications across a wide variety of fields were supported with examples originating from recent publications. The effectiveness of visual methods based on motion magnification in machine diagnosis and the identification of malfunctions are illustrated with selected examples of the implementation derived from authors’ workshop practice under industrial conditions.

Discerning the painter’s hand: machine learning on surface topography

Attribution of paintings is a critical problem in art history. This study extends machine learning analysis to surface topography of painted works. A controlled study of positive attribution was designed with paintings produced by a class of art students. The paintings were scanned using a confocal optical profilometer to produce surface data. The surface data were divided into virtual patches and used to train an ensemble of convolutional neural networks (CNNs) for attribution. Over a range of patch sizes from 0.5 to 60 mm, the resulting attribution was found to be 60 to 96% accurate, and, when comparing regions of different color, was nearly twice as accurate as CNNs using color images of the paintings. Remarkably, short length scales, as small as twice a bristle diameter, were the key to reliably distinguishing among artists. These results show promise for real-world attribution, particularly in the case of workshop practice.

lern.medien.werk.statt Hochschullernwerkstätten in der Digitalität

The volume "lern.medien.werk.statt" is dedicated to the discussion of university learning workshops about their different concepts and their different self-image. In addition, the focus is explicitly on the topic of university learning workshops and digitality. Theoretical and conceptual connections between the discourses on learning workshops and media education will be explored, as well as possible incompatibilities, in an attempt to answer the following questions: - How can digital media be systematically integrated as tools to support free experimentation in learning workshops? - How can media education and in particular the use of digital media be meaningfully integrated into learning workshop concepts? - How does the work with (digital) media in the learning workshop practice take shape in concrete terms? The series " Lernen und Studieren in Lernwerkstätten – Impulse für Theorie und Praxis" is edited by Barbara Müller-Naendrup, Hartmut Wedekind, Markus Peschel and Eva Franz. The editors Barbara Holub, Klaus Himpsl-Gutermann, Monika Musilek-Hofer, Andrea Varelija-Gerber, Nina Grünberger work at the Institute for Interdisciplinary Education (IBS) at the Vienna University of Teacher Education. Katharina Mittlböck (formerly also PH Vienna) works at the University of Innsbruck.

Co wspólnego ma Wniebowzięcie Marii z Ostatnią Wieczerzą, czyli o genezie formy i ikonografii późnośredniowiecznego obrazu ze zbiorów Muzeum Narodowego w Poznaniu,(...)

The late medieval panel painting of the Assumption of Virgin Mary from the Collection of the National Museum in Poznań was most likely created in Greater Poland (Wielkopolska), probably in Poznań, in the early 16th century. Scholars have pointed out the connection of its iconography with several other art pieces from the area of Greater Poland. In the light of these findings, our painting seemed to be traditional in the terms of form, as well as of content. This paper shows that some formal solutions and motifs used in the painting from Poznań differ from a typical iconographic practice, and it has only partial coverage in literary sources. The Apostles’ behaviour not fully corresponding to the subject and the chair in which an unidentified Apostle is sitting in a strangely complicated pose by the sarcophagus are the exceptional traits of the Poznań painting. The reason for their presence is the fact that the painter quoted a large part of the copperplate engraving of the Netherlandish Master IAM of Zwolle on a completely different subject: the Last Supper. The painter repeated selected elements quite accurately, without trying too much to adopt them to the new context. The Poznań painting is one of the countless examples of the use of prints as a pattern in the late medieval workshop practice. But at the same time, it belongs to the smaller in number works that were created in a more sophisticated way, through a compilation of motifs taken from various sources, combined with iconographic transformations. The paintings of Jörg Stoker, active in Ulm, and the prominent Antwerp artist Joos van Cleve analysed in the paper, are the examples of the application of a similar creative procedure. The last part of the text is devoted to the reception of the copperplate engraving by Master IAM of Zwolle, which determined so markedly the form and iconography of the painting at the National Museum in Poznań. The range of impact of this pattern, including Northern France, Greater Poland, Austria, Southern Germany (?), Northern Italy, Sardinia and Castilla, illustrates how universal, despite all the regional differences, the visual culture of Latin Europe was at the time.

Addressing Firearm Safety Counseling: Integration of a Multidisciplinary Workshop in a Pediatric Residency Program

ABSTRACT Background Firearm-related injuries are the second leading cause of death among US children. Given this, firearm injury prevention should be a key aspect of pediatric anticipatory guidance. Objective We assessed the impact of a firearm safety counseling workshop on pediatric resident knowledge, self-efficacy, and self-reported practice patterns. Methods Sixty of 80 residents (75%) participated in a 2-hour multimodal workshop, including video, didactics with experts, and role-play scenarios. Participants were invited to complete pre-workshop, immediate post-workshop, and 3- and 6-month post-workshop self-reported questionnaires evaluating knowledge, comfort, perceived barriers, and reported practice patterns. Data comparing pre- and 6-month post-workshop practice patterns were analyzed via Fischer's exact test. Remaining statistical analysis utilized a one-sided, unpaired Mann–Whitney U test. A binomial exact proportions test was used for open-ended responses. Results After the workshop, the percentage of participants with perceived concern regarding parental barriers decreased significantly (24% to 7%, P = .001). Participants 6 months post-workshop were 5.14 times more likely to counsel their patients on firearms during more than 75% of their well visits than prior to the intervention (P = .010). Participants reported greater comfort asking patients about firearms, with mean Likert scores increasing from 3.81 pre to 4.33 post (P = .022), which was similar to 3-month (4.39, P = .06) and 6-month evaluations (4.54, P = .003). Conclusions Education on firearm safety counseling improved pediatric resident comfort level in discussing the topic. This impact persisted 6 months after the workshop, implying a sustained change in attitudes and behaviors.

HEART RATE VARIABILITY IN WOODWORKING MACHINIST TRAINEES DURING WORKSHOP PRACTICE

The impact of specific factors on students during workshop practice results in tension of regulatory and adaptive mechanisms. This fact can be estimated according to the heart rate variability (HRV). It is of the integral indicators reflecting all mechanisms of cardiac regulation. The aim of the study is to assess students’ adaptive capacity during workshop training based on HRV. Materials and Methods. The authors divided 30 students into two groups: a group of less adapted and a group of more adapted students. J. Strelau’s theory on temperament and H. Eysenck's personality types were used for the purpose. The authors studied heart rate variability at the beginning and at the end of workshop practice. Statistika 6.0 for Windows was used to process the results. Results. The authors distinguished differences in HRV in two study groups. Before practice, the regulatory system tension index was 479.64 in the group of less adapted students. It was 106.86 in the group of more adapted students. The total power (ms2) indicating adaptive capacity was by 80.9 % higher in more adapted students. After workshop practice, changes in the tonus of the autonomic nervous system were observed in both study groups. However, in the group of less adapted students, indicators confirming sympathicotonia and a decrease in heart rate variability changed to a greater degree. Thus, tension index in the group of more adapted students increased by 46.7 %, and in the group of less adapted students – by 209.9 %. The authors also observed a decrease in the total power: in more adapted students by 51.3 %, and in the less adapted students by 54.3 %. Results. Analysis of HRV showed a more evident adverse influence of workshop practice on less adapted students. Keywords: students, workshop practice, heart rate variability. Воздействие специфических факторов на учащихся при прохождении производственной практики приводит к напряжению регуляторно-адаптивных механизмов, что можно оценить по вариабельности ритма сердца (ВРС) – одному из интегральных показателей, отражающих механизмы сердечной регуляции на всех уровнях. Цель исследования. Оценить адаптивные возможности учащихся при прохождении производственной практики по показателям ВРС. Материалы и методы. У 33 учащихся, разделенных согласно теории Я. Стреляу и в соответствии с психологическими типами личности по Айзенку на группы менее адаптированных и более адаптированных, изучили вариабельность ритма сердца в начале и конце производственной практики. Для обработки результатов исследования применяли программу Statistika 6,0 for Windows. Результаты. Установлены различия ВРС в двух исследуемых группах. До практики индекс напряжения регуляторных систем (ИН) в группе менее адаптированных составил 479,64, в группе более адаптированных учащихся – 106,86. Общая мощность спектра ТР (мс2), свидетельствующая об адаптивных возможностях, у более адаптированных учащихся была выше на 80,9 %. После производственной практики изменения тонуса вегетативной нервной системы отмечены в обеих исследуемых группах. Однако в группе менее адаптированных учащихся показатели, свидетельствующие о симпатикотонии и уменьшении вариабельности ритма сердца, изменились в большей степени. Так, ИН в группе более адаптированных учащихся увеличился на 46,7 %, а в группе менее адаптированных – на 209,9 %. Отмечено уменьшение общей мощности спектра: у более адаптированных на 51,3 %, у менее адаптированных на 54,3 %. Выводы. На основании анализа ВРС показано более выраженное неблагоприятное влияние производственной практики на менее адаптированных учащихся. Ключевые слова: учащиеся, производственная практика, вариабельность ритма сердца.

Design and development mini compression molding for teaching and learning

Compression molding is a major technology in the plastic industry, and the one of the original processing techniques for manufacturing plastic. The current study was aimed to design and fabrication of mini compression molding machine for use in laboratory workshop or education institution. This machine was designed and fabricated to reduce the cost of expensive purchasing and cost maintenance of compression molding machines used in the industry. Mini compression molding provides for study of implemented to facilitate the production process of plastic products according to the mold provided. This machine used an oven as a heater to melt the resin in the mold provided and car jack as pressure to compress the resin after melting. The parameter has been considered is a temperature and pressure of the process of flow raw material into the cavity and period time of melting. Based on the test, the optimize of temperature suitable for heating the polypropylene plastic (PP) to melt is at 250°C, while the best time to melt of at 250°C is within 15 minutes. From the results obtained based on the quality of mold produced by the mini compression molding machine, the fabricated machine performance was satisfactory and can be used locally institution and industrially in small scale. This Mini compression molding used in Manufacturing lab in PSMZA for subject of DJF2012 (Manufacturing Workshop Practice 2) as development aids in Teaching and Learning.

Practicum Workshop and Learning Media Quality in the Light Vehicle Engineering Department of Vocational High Schools

The study is to determine the quality of workshop practice and media learning of light vehicle engineering in Vocational High Schools in terms of (1) the facilities and infrastructure of laboratory and (2) the use of instructional media practices of light vehicle engineering. The collection of data used the method of observation, documentation, interview. This type of qualitative research is a case study approach, involving five internship supervisor teachers and workshop managers. The results of the study showed that the practice of Automotive Engine Repair with spacious 84 m2, Automotive Chassis Repair with a spacious 72 m2, Automotive Electrical Repair with spacious 24 m2 had not yet met the standard minimum as suggested at the Minister of Education and Culture Regulation number 34 of 2018. The use of practical learning media was less effective because: (1) the comparison of study groups with the area of the workshop was not balanced, (2) the existence of some practicum subjects scheduled in the same day resulted in the students were practicing simultaneously at one time, and (3) the lack of practicum facilities.