Cosmic multi-muon bundles measured at DELPHI

The DELPHI detector at LEP, located 100 $m$ underground, has been used to detect the multi-muon bundles by cathode readout of its hadron calorimeter and its tracking detectors (TPC, muon chambers). The experimental apparatus allows us to study muon bundles originating from primary cosmic particles with energies in the interval $10^{14}$ - $10^{17} eV$. The cosmic events registered during the years 1999 and 2000 correspond roughly to $1.6 10^6 s$ of effective run time. The aim of the work is to compare the measured muon multiplicity distributions and predictions of high energy interaction models for different types of primary particles and also to determine the absolute flux of events in certain muon multiplicity range. The presentation describes the current status of the analysis.Comment: 2 pages, 1 figure, presented at XXXVIIth Rencontres de Moriond Electroweak Interactions and Unified Theories 2002 (Young Scientists Forum

On Stimulated Radiation of Black Holes

The Unruh's thermal state in the vicinity of the event horizon of the black hole provides conditions where impinging particles can radiate other particles. The subsequent decays may eventually lead to observable radiation of photons and neutrinos induced even by massive particles with gravitational interaction only. The hadronic particles will induce $\sim 30$ MeV gamma radiation from $\pi^{0}$ decays.Comment: 4 pages, 1 figur

Examining Long-Term Global Climate Change on the Web

This article describes an activity in which students use web-based resources to investigate global climate change. The investigation takes the form of a computer activity in which they collect data from the internet on temperature, concentrations of various gases, oxygen isotopes, and others. The activity begins by posing the question: 'Should the U.S. and other countries limit emissions of greenhouse gases to reduce global warming?' The students then construct graphs, look for trends, and report their findings. Educational levels: Middle school, High school, Undergraduate lower division

Can We Observe the Quark Gluon Plasma in Cosmic Ray Showers ?

The possibility of detection of some features of high energy particle interactions with detectors placed at medium depths underground through studies on high energy muons is investigated. These muons carry information about the early interactions occurring during the development of the hadron cascade near the top of the atmosphere. They might reveal the effects resulting from creation of quark gluon plasma in interactions of ultra high energy cosmic ray iron nuclei with air nuclei.Comment: 16 pages, 8 figures, amended versio

Calibrated Peer Review Assignments for the Earth Sciences

Calibrated Peer Review ™ (CPR), a web-based instructional tool developed as part of the National Science Foundation reform initiatives in undergraduate science education, allows instructors to incorporate multiple writing assignments in large courses without overwhelming the instructor. This study reports successful implementation of CPR in a large, introductory geology course and student learning of geoscience content. For each CPR assignment in this study, students studied web-based and paper resources, wrote an essay, and reviewed seven essays (three from the instructor, three from peers, and their own) on the topic. Although many students expressed negative attitudes and concerns, particularly about the peer review process of this innovative instructional approach, they also recognized the learning potential of completing CPR assignments. Comparing instruction on earthquakes and plate boundaries using a CPR assignment vs. an instructional video lecture and homework essay with extensive instructor feedback, students mastered more content via CPR instruction

ANALISIS PREFERENSI WISATAWAN NUSANTARA DAN WISATAWAN MANCANEGARA TERHADAP PENGEMBANGAN PRODUK WISATA ALAM DI KAWASAN KONSERVASI INDONESIA

Ditargetkannya jumlah wisatawan ke kawasan konservasi yang tercantum pada RESTRA PJLHK 2015 – 2019 dimana target jumlah wisatawan nusantara sebesar 20 juta wisatawan dan target jumlah wisatawan mancanegara sebesar 1,5 juta membuat adanya kontradiksi antara target dan fungsi dari kawasan konservasi. Untuk menyelesaikan permasalahan kontradiksi tersebut diperlukan model pengelolaan wisata alam di kawasan konservasi Indonesia dimana salah satunya mengandung kajian permintaan wisatawan berdasarkan preferensi. Tujuan dari penelitian ini adalah menganalisis karakteristik wisatawan menggunakan analisis frekuensi dan menganalisis preferensi wisatawan mengenai pengembangan produk wisata menggunakan analisis semantik diferensial. Metode penelitian yang digunakan deskriptif kuantitatif. Variabel dalam penelitian ini adalah karakteristik wisatawan dan preferensi produk wisata alam. Pengumpulan data menggunakan kuesioner dengan jumlah 400 responden. Berdasarkan hasil penelitian, preferensi wisatawan menginginkan pengembangan produk fasilitas, penunjang, aktivitas dan produk tambahan yang bersifat alami. ;---Conservation area of Indonesia has a target number of tourist which is written in RESTRA PJLHK 2015 – 2019. Target number of domectic tourist is 20 million and target number of foreign tourist is 1,5 million. Those target has a contradictive situation with the function of conservation area. Solving those contradictive situation needed model of nature-based tourism management in conservation Indonesia which is comprise tourist demand. This research focus on demand tourist based on preferences. Aim of this research is to analyzing tourist characterstics used frequencies analysis and tourist preference used semantic differential analysis. The variable in this research are tourist characterstics and tourist preference. Collecting data used questionnaire with 400 respondent. Based on the obtained research’s results, it is known that tourist preference on product development is back to nature