Relative commutants of strongly self-absorbing C*-algebras

The relative commutant $A'\cap A^{\mathcal{U}}$ of a strongly self-absorbing algebra $A$ is indistinguishable from its ultrapower $A^{\mathcal{U}}$. This applies both to the case when $A$ is the hyperfinite II$_1$ factor and to the case when it is a strongly self-absorbing C*-algebra. In the latter case we prove analogous results for $\ell_\infty(A)/c_0(A)$ and reduced powers corresponding to other filters on $\bf N$. Examples of algebras with approximately inner flip and approximately inner half-flip are provided, showing the optimality of our results. We also prove that strongly self-absorbing algebras are smoothly classifiable, unlike the algebras with approximately inner half-flip.Comment: Some minor correction

Teacher Praises and Students' Engagement in Efl Classroom (a Case Study of Seventh Grade Students at One of Junior High School in Bandung)

The study analyzed the use of praise and its influence toward students' engagement. Qualitative approach was employed in this study. The obtained data were analyzed by using the theory of effective praise by Conolly et al (1995) and also the theory of characteristics of students' engagement by Jones (2009). The data of this study were obtained from classroom observation. The result of this study showed that the way teacher gives praise to the students is in line with the theory of effective praise. The observed teacher in this study gave praise to the students in four steps: description of appropriate behavior, rationale, request acknowledgment, and positive consequence. In addition, the result of the study also showed students' positive engagement after being praised by the teacher. There were five characteristics of students' engagement that appeared during classroom observation: positive body language, consistent focus, verbal participation, students' confidence, and fun and excitement. In conclusion, the use of praise would influence students' positive engagement if it was given properly

Proses Pengolahan Ikan Tongkol Abu-Abu (Thunnus tonggol) dalam Kaleng Dengan Media Air Garam di PT. Jui Fa International Foods, Cilacap-Jawa Tengah

Pengalengan merupakan salah satu bentuk pengolahan dan pengawetan ikan secara modern yang dikemas secara hermetis dan disterilkan. Penelitian ini bertujuan untuk mengetahui proses pengalengan ikan tongkol abu-abu (Thunnus tonggol) dalam kaleng dengan media air garam. Metode penelitian dilakukan melalui observasi dengan mengikuti secara langsung seluruh proses pengolahan, mulai dari penerimaan bahan baku hingga pemuatan, serta melakukan pengujian terhadap mutu organoleptik dan kimia, pengamatan suhu. Analisa data dilakukan secara deskriptif-komparatif. Hasil pengujian mutu nilai organoleptik bahan baku 8 dan produk akhir adalah 9. Hasil uji histamin berkisar 1,63 ppm sd 4,4 ppm. Uji kadar garam berkisar 0,36% sd 0,94%. Pengamatan suhu pada tahapan proses adalah receiving -8,5 °C, penyimpanan beku -18,8 ºC, thawing -4 ºC, pre-cooking 62,5ºC, spraying 38,71 ºC, skinning off 34,71 ºC, cleaning 33,6 ºC, filling 31,45ºC. Kesimpulan menunjukkan bahwa proses pengolahan tongkol abu-abu dalam kaleng media air garamsudah dilakukan dengan baik sesuai dengan (SNI 8223:2016) ikan tongkol abu-abu (Thunnus sp.) dalam kaleng

Aktivitas Antijamur Asap Cair Dari Sebuk Gergaji Kayu Akasia (Acacia Mangium Willd) Dan Kayu Laban (Vitex Pubescens Vahl)

Antifungal Activity of Liquid Smoke from Acacia mangium Willd and Vitex pubescens Vahl Wood Wastes. Aspergillus flavus is the most important fungi species because of its toxygenic characteristic on agricultural product. This research was conducted to test of wood vinegar as antifungal activity. The research was conducted in several steps i.e. pyrolisis of liquid smoke, analysis of liquid smoke content, and efficacy test of liquid smoke as antifungal. Liquid smoke was made from burning wood meal from wood wastes. Wood wastes consist of Acacia mangium Willd (akasia) and Vitex pubescens Vahl (laban). Agar media used was PDA (potatoes dextrose agar) and concentration of liquid smoke was 0, 1, 2, and 3% (v/v). The results indicated that the liquid smoke has inhibited the fungi growth. The liquid smoke with concentration of 2% had index anti fungal 80.19-100%. The growth rate of A. flavus was decrease as well as increasing the concentration of liquid smoke. The contents of organic fraction of liquid smoke, such as acid and phenol might be responsible for the difference in antifungal activities among these liquid smokes

Composition chimique de l’huile essentielle de Satureja calamintha (L.) Scheele du Maroc

Ce travail vise l’étude de la composition chimique de l’huile essentielle de Satureja calamintha (L.) Scheele du Maroc. Les constituants chimiques principaux de cette huile essentielle sont borneol (34.52%), αcampholenic aldehyde (14.26%), cedren-13-ol (6.45%), et manoyloxide (3.78%).Mots-clés : huile essentielle, Satureja calamintha, composition chimique.Chemical composition of essential oil of Satureja Calamintha (L.) Scheele of MoroccoThis work aims to study the chemical composition of essential oil of Satureja Calamintha (L.) Scheele of Morocco. The main chemical constituents of the essential oil are Borneol (34.52%), α-campholenic aldehyde (14.26%), cedrene-13-ol, 8 - (6.45%), and manoyloxide (3.78%).Keywords : essential oil, Satureja Calamintha, chemical composition

A cognitive process approach to modeling gap acceptance in overtaking

Driving automation holds significant potential for enhancing traffic safety. However, effectively handling interactions with human drivers in mixed traffic remains a challenging task. Several models exist that attempt to capture human behavior in traffic interactions, often focusing on gap acceptance. However, it is not clear how models of an individual driver's gap acceptance can be translated to dynamic human-AV interactions in the context of high-speed scenarios like overtaking. In this study, we address this issue by employing a cognitive process approach to describe the dynamic interactions by the oncoming vehicle during overtaking maneuvers. Our findings reveal that by incorporating an initial decision-making bias dependent on the initial velocity into existing drift-diffusion models, we can accurately describe the qualitative patterns of overtaking gap acceptance observed previously. Our results demonstrate the potential of the cognitive process approach in modeling human overtaking behavior when the oncoming vehicle is an AV. To this end, this study contributes to the development of effective strategies for ensuring safe and efficient overtaking interactions between human drivers and AVs