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Transverse single-spin asymmetry of midrapidity π0 and η mesons in p+Au and p+Al collisions at sNN=200 GeV

Physical Review D 2023年第11期107卷 112004-112004页

作者： N. J. Abdulameer U. Acharya C. Aidala Y. Akiba M. Alfred V. Andrieux N. Apadula H. Asano B. Azmoun V. Babintsev N. S. Bandara K. N. Barish S. Bathe A. Bazilevsky M. Beaumier R. Belmont A. Berdnikov Y. Berdnikov L. Bichon B. Blankenship D. S. Blau J. S. Bok V. Borisov M. L. Brooks J. Bryslawskyj V. Bumazhnov S. Campbell V. Canoa Roman R. Cervantes M. Chiu C. Y. Chi I. J. Choi J. B. Choi Z. Citron M. Connors R. Corliss Y. Corrales Morales N. Cronin M. Csanád T. Csörgő T. W. Danley M. S. Daugherity G. David C. T. Dean K. DeBlasio K. Dehmelt A. Denisov A. Deshpande E. J. Desmond A. Dion D. Dixit V. Doomra J. H. Do A. Drees K. A. Drees J. M. Durham A. Durum H. En’yo A. Enokizono R. Esha B. Fadem W. Fan N. Feege D. E. Fields M. Finger, Jr. M. Finger D. Firak D. Fitzgerald S. L. Fokin J. E. Frantz A. Franz A. D. Frawley Y. Fukuda P. Gallus C. Gal P. Garg H. Ge M. Giles F. Giordano Y. Goto N. Grau S. V. Greene M. Grosse Perdekamp T. Gunji H. Guragain T. Hachiya J. S. Haggerty K. I. Hahn H. Hamagaki H. F. Hamilton J. Hanks S. Y. Han M. Harvey S. Hasegawa T. O. S. Haseler T. K. Hemmick X. He J. C. Hill K. Hill A. Hodges R. S. Hollis K. Homma B. Hong T. Hoshino N. Hotvedt J. Huang K. Imai M. Inaba A. Iordanova D. Isenhower D. Ivanishchev B. V. Jacak M. Jezghani X. Jiang Z. Ji B. M. Johnson D. Jouan D. S. Jumper J. H. Kang D. Kapukchyan S. Karthas D. Kawall A. V. Kazantsev V. Khachatryan A. Khanzadeev A. Khatiwada C. Kim E.-J. Kim M. Kim T. Kim D. Kincses A. Kingan E. Kistenev J. Klatsky P. Kline T. Koblesky D. Kotov L. Kovacs S. Kudo B. Kurgyis K. Kurita Y. Kwon J. G. Lajoie D. Larionova A. Lebedev S. Lee S. H. Lee M. J. Leitch Y. H. Leung N. A. Lewis S. H. Lim M. X. Liu X. Li V.-R. Loggins D. A. Loomis K. Lovasz D. Lynch S. Lökös T. Majoros Y. I. Makdisi M. Makek V. I. Manko E. Mannel M. McCumber P. L. McGaughey D. McGlinchey C. McKinney M. Mendoza A. C. Mignerey A. Milov D. K. Mishra J. T. Mitchell M. Mitrankova Iu. Mitrankov G. Mitsuka S. Miyasaka S. Mizuno M. M. Mondal P. Montuenga T. Moon D. P. Morrison A. Muhammad B. Debrecen University H-4010 Debrecen Egyetem tér 1 Hungary Georgia State University Atlanta Georgia 30303 USA Department of Physics University of Michigan Ann Arbor Michigan 48109-1040 USA RIKEN Nishina Center for Accelerator-Based Science Wako Saitama 351-0198 Japan RIKEN BNL Research Center Brookhaven National Laboratory Upton New York 11973-5000 USA Department of Physics and Astronomy Howard University Washington DC 20059 USA Iowa State University Ames Iowa 50011 USA Kyoto University Kyoto 606-8502 Japan Physics Department Brookhaven National Laboratory Upton New York 11973-5000 USA IHEP Protvino State Research Center of Russian Federation Institute for High Energy Physics Protvino 142281 Russia Department of Physics University of Massachusetts Amherst Massachusetts 01003-9337 USA University of California-Riverside Riverside California 92521 USA Baruch College City University of New York New York New York 10010 USA University of Colorado Boulder Colorado 80309 USA Physics and Astronomy Department University of North Carolina at Greensboro Greensboro North Carolina 27412 USA Saint Petersburg State Polytechnic University St. Petersburg 195251 Russia Vanderbilt University Nashville Tennessee 37235 USA National Research Center “Kurchatov Institute” Moscow 123098 Russia National Research Nuclear University MEPhI Moscow Engineering Physics Institute Moscow 115409 Russia New Mexico State University Las Cruces New Mexico 88003 USA Los Alamos National Laboratory Los Alamos New Mexico 87545 USA Columbia University New York New York 10027 and Nevis Laboratories Irvington New York 10533 USA Department of Physics and Astronomy Stony Brook University SUNY Stony Brook New York 11794-3800 USA University of Illinois at Urbana-Champaign Urbana Illinois 61801 USA Jeonbuk National University Jeonju 54896 Korea Weizmann Institute Rehovot 76100 Israel ELTE Eötvös Loránd University H-1117 Budapest Pázmány P. s. 1/A Hungary MATE Laboratory of

Presented are the first measurements of the transverse single-spin asymmetries (AN) for neutral pions and eta mesons in p+Au and p+Al collisions at sNN=200 GeV in the pseudorapidity range |η|<0.35 with the PHENIX detector at the Relativistic Heavy Ion Collider. The asymmetries are consistent with zero, similar to those for midrapidity neutral pions and eta mesons produced in p+p collisions. These measurements show no evidence of additional effects that could potentially arise from the more complex partonic environment present in proton-nucleus collisions.

关键词： Beam polarization Hadron-hadron interactions Polarization phenomena Relativistic heavy-ion collisions Mesons Pions Polarization Spin

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Transverse single-spin asymmetry of charged hadrons at forward and backward rapidity in polarized p+p, p+Al, and p+Au collisions at sNN=200 GeV

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Physical Review D 2023年第7期108卷 072016-072016页

Reported here are transverse single-spin asymmetries (AN) in the production of charged hadrons as a function of transverse momentum (pT) and Feynman-x (xF) in polarized p↑+p, p↑+Al, and p↑+Au collisions at sNN=200 GeV. The measurements have been performed at forward and backward rapidity (1.4<|η|<2.4) over the range of 1.5 GeV/c0) in p↑+p collisions, whereas the p↑+Al and p↑+Au results show smaller asymmetries. This finding provides new opportunities to investigate the origin of transverse single-spin asymmetries and a tool to study nuclear effects in p+A collisions.

关键词： Beam polarization Hadron-hadron interactions Polarization phenomena Relativistic heavy-ion collisions Hadrons Spin

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Improved Location of Microseismic Events in Borehole Monitoring by Inclusion of Particle Motion Analysis: a Case study at a CBM Field in Indonesia

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IOP Conference Series: Earth and Environmental Science 2017年第1期62卷

作者： Rexha Verdhora Ry T. Septyana S. Widiyantoro A. D. Nugraha A. Ardjuna Graduate Program of Geophysical Engineering Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Ganesha 10 Bandung 40132 Indonesia BP Indonesia Global Geophysics Research Group Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Ganesha 10 Bandung 40132 Indonesia SKK Migas Indonesia

Microseismic monitoring and constraining its hypocenters in and around hydrocarbon reservoirs provides insight into induced deformation related to hydraulic fracturing. In this study, we used data from a single vertical array of sensors in a borehole, providing measures of arrival times and polarizations. Microseismic events are located using 1-D velocity models and arrival times of P- and S-waves. However, in the case of all the sensors being deployed in a near-vertical borehole, there is a high ambiguity in the source location. Herein, we applied a procedure using azimuth of P-wave particle motion to constrain and improve the source location. We used a dataset acquired during 1-day of fracture stimulation at a CBM field in Indonesia. We applied five steps of location procedure to investigate microseismic events induced by these hydraulic fracturing activities. First, arrival times for 1584 candidate events were manually picked. Then we refined the arrival times using energy ratio method to obtain high consistency picking. Using these arrival times, we estimated back-azimuth using P-wave polarization analysis. We also added the combination of polarities analysis to remove 180° ambiguity. In the end, we determined hypocenter locations using grid-search method that guided in the back-azimuth trace area to minimize the misfit function of arrival times. We have successfully removed the ambiguity and produced a good solution for hypocenter locations as indicated statistically by small RMS. Most of the events clusters highlight coherent structures around the treatment well site and revealed faults. The same procedure can be applied to various other cases such as microseismic monitoring in the field of geothermal and shale gas/oil exploration, also CCS (Carbon Capture and Storage) development.

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Corrigendum to “Forest Hydrology in Chile;paste, present, and future” [J. Hydrol. 616 (2023)]

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Journal of Hydrology 2023年 617卷

作者： Francisco Balocchi Mauricio Galleguillos Diego Rivera Alejandra Stehr Jose Luis Arumi Roberto Pizarro Pablo Garcia-Chevesich Andrés Iroumé Juan J. Armesto Pedro Hervé-Fernández Carlos Oyarzún Pilar Barria Christian Little Gabriel Mancilla Santiago Yépez Rolando Rodriguez Don A. White Richard P. Silberstein Daniel G. Neary Pablo Ramírez de Arellano Bioforest SA camino a Coronel s/n km 15 Coronel Chile Water Resources and Energy for Agriculture PhD Program Water Resources Department Universidad de Concepción Chillán Chile Facultad de Ingeniería y Ciencias Universidad Adolfo Ibañez Santiago Chile Center for Climate and Resilience Research (CR2) University of Chile Santiago Chile Centro de Sustentabilidad y Gestión Estratégica de Recursos (CiSGER) Facultad de Ingeniería Universidad del Desarrollo Las Condes Chile Water Research Center for Agriculture and Mining (ANID/FONDAP/15130015) Victoria 1295 4070411 Concepción Chile Departamento Ingeniería Civil Facultad de Ingeniería Universidad de Concepción Concepción Chile Departamento de Recursos Hídricos Facultad de Ingeniería Agrícola Universidad de Concepción Chillan Chillan Chile Cátedra Unesco en Hidrología de Superficie U. de Talca Chile. Avda. Lircay s/n Talca Chile Centro Nacional de Excelencia para la Industria de la Madera (CENAMAD) Pontificia Universidad Católica de Chile Av. Vicuña Mackenna 4860 Santiago de Chile Chile Colorado School of Mines Department of Civil and Environmental Engineering 1500 Illinois St. Golden CO 80401 USA Universidad Austral de Chile Facultad de Ciencias Forestales y Recursos Naturales Valdivia Chile Departamento de Ecología Pontificia Universidad Católica de Chile Alameda 340 Santiago Chile Institute of Ecology and Biodiversity (IEB) Santiago Chile Cary Institute of Ecosystem Studies Millbrook NY 12545 USA Global Institute for Water Security School of Environment and Sustainability University of Saskatchewan 11 Innovation Boulevard Saskatoon SK S7N 3H5 Canada Laboratorio de Monitoreo de Pastizales Departamento de Ciencias Agropecuarias y Acuícolas Facultad de Ciencias Universidad de Magallanes Punta Arenas 6210005 Chile Instituto Ciencias de la Tierra Universidad Austral de Chile Valdivia Chile Facultad de Ciencias Forestales y de la Conservación de la Naturaleza Universidad de Chile Santiago Chile Instituto

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Deformation of Ferrogel Based on Carboxyl Methyl Cellulose (CMC)/Polyvinyl Alcohol (PVA) Hydrogel

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IOP Conference Series: Materials Science and engineering 2018年第1期367卷

作者： Sunaryono M. N. Kholifah Yudyanto A. Taufiq N. Mufti R. Wulandari Munasir M. Diantoro Department of Physics Faculty of Mathematics and Natural Sciences Universitas Negeri Malang Jl. Semarang No 5 Malang 65145 Indonesia Research Center of Minerals and Advanced Materials Faculty of Mathematics and Natural Sciences Universitas Negeri Malang Jl. Semarang 5 Malang 65145 Engineering Physics Study Program Faculty of Industrial Technology Institut Teknologi Bandung Jl. Ganesha 10 Bandung 40132 Indonesia Departement of Physics Faculty of Mathematics and Natural Sciences Universitas Negeri Surabaya Ketintang Surabaya 60231 Indonesia

Ferrogel is a smart material that combines the elastic properties of hydrogel and magnetic behavior from the filler of magnetic materials. In this work, ferrogel was fabricated through a freezing-thawing process with matrix materials of Carboxyl Methyl Cellulose (CMC)/Polyvinyl Alcohol (PVA) and a filler of magnetite. Magnetite nanoparticles were successfully synthesized by using a coprecipitation method at room temperature. The magnetite filler was investigated via X-ray Diffractometer (XRD) and Transmission Electron Microscopy (TEM), respectively, to analyze the structure and morphology of the magnetite. Based on the XRD analysis, the magnetite nanoparticle was matched by ICSD number of 9013529 and has an average particle size of about ~ 9.67 nm. This result is well confirmed by the TEM characterization that showed an average particle size of 9.32 nm. Furthermore, ferrogel was explored by using a Vibrating Sample Magnetometer (VSM) and an electromagnetic instrument to measure the magnetic properties and deformation of ferrogel, respectively. The VSM analysis showed that CMC/PVA hydrogel-based ferrogel has a superparamagnetic behavior due to its magnetization remanent and field coercivity that is close to zero. Interestingly, the deflection of Fe3O4/CMC/PVA ferrogel under the effect of the external magnetic field exhibited a good response. The deformation of ferrogel significantly increased from 4.9 cm to 7.0 cm as the filler of magnetite in the ferrogel was increasing from 14 wt% to 22 wt%. This phenomenon could be improved and explored to change the ferrogel into an artificial muscle by engineering the concentration and magnetite response in the CMC/PVA hydrogel.

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Mitigation of landslide area around railway tunnel, South Sumatra Province, Indonesia

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AIP Conference Proceedings 2017年第1期1885卷

作者： M. Taufik Toha Dedi Setiabudidaya Syamsul Komar Bochori Moamar A. Ghadafi Mirza Adiwarman S. E. Rahim 1Department of Mining Engineering Faculty of Engineering Sriwijaya University Indralaya 30662 South Sumatra Indonesia 2Department of Phyisical Faculty of Math and Science Sriwijaya University Indralaya 30662 South Sumatra Indonesia 3Graduate Study of Mining Engineering Faculty of Engineering Sriwijaya University Indrala 30662 South Sumatra Indonesia 4Agrotechnology Department Faculty of Agriculture University of Palembang Palembang 30139 South Sumatra Indonesia

Adequate and safe railway line infrastructures as well as facilities are required to support the rail transport system in South Sumatra. The slope stability along railway line of Lahat-Lubuk Linggau South Sumatra were studied during landslide that occured on January 23th, 2016. The landslide occurred on the mouth of railway tunnel in Gunung Gajah Village, Lahat District that causing the railway transportation system had to be stopped for a few days. A comprehensive research was conducted to analyze the causes of the landslide and to identify other landslide risky areas along the railway line Lahat-Lubuk Linggau. The research activities included surveying, sampling, laboratory testing, investigating condition of geology, geotechnics, hydrogeology/hydrology, morphology and land use. The factors that cause landslide in the past studies were found to be morphology, structural geology, physical and mechanical characteristics, hydrogeology, hydrology, external forces (train vibration, earthquake). Results back analysis of slope stability when the landslide occurred showed that the value Safety Factor (SF) = 1, angle of friction = 0°, and cohesion = 0.49 kg/cm2 (49 kPa). Based on the observation and analysis of the condition of the morphology and orientation of the structure of the rock layers, there was a location prone to landslide (labile) in the surrounding area of the landslide. Mitigations to potential landslide in adjacent area were building a retaining wall, draining channels, and shortcrete at the rock wall after landslides and maintaining the land use around the slopes.

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Contribution of student involvement in production/service unit and experience of industry practices to entrepreneurial attitude and the impact entrepeneurship readiness of vocational high school students of great Malang

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AIP Conference Proceedings 2017年第1期1887卷

作者： Halimahtus Mukminna Isnandar Muladi 1Vocational Education Study Program Postgraduate State University of Malang Malang Indonesia 2Department of Civil Engineering Faculty of Engineering State University of Malang Malang Indonesia 3Department of Electrical Engineering Faculty of Engineering State University of Malang Malang Indonesia

Purpose of this research was to determine the contribution of student involvement in production/ service unit (X1), experience of industry practices (X2), and entrepreneurial attitude (Y) towards readiness entrepreneurship (Z) of vocational student regional Malang. The design of the study using a quantitative approach. The samples used as many as 130 respondents. Instruments used for collecting data in the form of questionnaires. Data analysis included descriptive and test of hypothesis. The result showed: that the description of data on the level of student involvement in production/ service unit, experience of industry practices, entrepreneurial attitude and entrepreneurship readiness in the high category. The contribution student involvement in production/ service unit of entrepreneurial attitude of 10.6%. The contribution experience of industry practices of entrepreneurial attitude of 17.4%. The contribution student involvement in production/ service unit and experience of industry practices simultaneously to entrepreneurial attitude of 44.1%. The contribution student involvement in production/ service unit of readiness entrepreneurship of 4%. The contribution experience of industry practices of readiness entrepreneurship of 5%. The contribution entrepreneurial attitude of readiness entrepreneurship of 16%. Finally, the contribution student involvement in production/ service unit, experience of industry practices, and entrepreneurial attitude simultaneously to readiness entrepreneurship of 50.3%.

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The electron-capture origin of supernova 2018zd

arXiv

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arXiv 2020年

作者： Hiramatsu, Daichi Howell, D. Andrew van Dyk, Schuyler D. Goldberg, Jared A. Maeda, Keiichi Moriya, Takashi J. Tominaga, Nozomu Nomoto, Ken'ichi Hosseinzadeh, Griffin Arcavi, Iair McCully, Curtis Burke, Jamison Bostroem, K. Azalee Valenti, Stefano Dong, Yize Brown, Peter J. Andrews, Jennifer E. Bilinski, Christopher Williams, G. Grant Smith, Paul S. Smith, Nathan Sand, David J. Anand, Gagandeep S. Xu, Chengyuan Filippenko, Alexei V. Bersten, Melina C. Folatelli, Gastón Kelly, Patrick L. Noguchi, Toshihide Itagaki, Koichi Las Cumbres Observatory 6740 Cortona Drive Suite 102 GoletaCA93117-5575 United States Department of Physics University of California Santa BarbaraCA93106-9530 United States Caltech/Spitzer Science Center Caltech IPAC Mailcode 100-22 PasadenaCA91125 United States Department of Astronomy Kyoto University Kitashirakawa-Oiwake-cho Sakyo-ku Kyoto606-8502 Japan University of Tokyo Institutes for Advanced Study University of Tokyo 5-1-5 Kashiwanoha Kashiwa Chiba277-8583 Japan National Astronomical Observatory of Japan National Institutes of Natural Sciences 2-21-1 Osawa Mitaka Tokyo181-8588 Japan School of Physics and Astronomy Faculty of Science Monash University ClaytonVIC3800 Australia Department of Physics Faculty of Science and Engineering Konan University 8-9-1 Okamoto Hyogo Kobe658-8501 Japan Center for Astrophysics Harvard & Smithsonian 60 Garden Street CambridgeMA02138-1516 United States School of Physics and Astronomy Tel Aviv University Tel Aviv69978 Israel CIFAR Azrieli Global Scholars Program CIFAR Toronto Canada Department of Physics University of California 1 Shields Ave DavisCA95616-5270 United States Mitchell Institute for Fundamental Physics and Astronomy Texas A&M University College StationTX77843 United States Steward Observatory University of Arizona 933 North Cherry Avenue TucsonAZ85721-0065 United States MMT Observatory P.O. Box 210065 TucsonAZ85721-0065 United States Infrared Processing and Analysis Center California Institute of Technology PasadenaCA91125 United States Institute for Astronomy University of Hawai'i 2680 Woodlawn Drive HonoluluHI96822 United States Media Arts and Technology University of California Santa BarbaraCA93106-6065 United States Department of Astronomy University of California BerkeleyCA94720-3411 United States Miller Institute for Basic Research in Science University of California BerkeleyCA94720 United States CONICET Argentina Facultad de Ciencias Astronómi

In the transitional mass range (∼ 8-10 solar masses) between white dwarf formation and iron core-collapse supernovae, stars are expected to produce an electron-capture supernova. Theoretically, these progenitors are thought to be super-asymptotic giant branch stars with a degenerate O+Ne+Mg core, and electron capture onto Ne and Mg nuclei should initiate core collapse1,2,3,4. However, no supernovae have unequivocally been identified from an electron-capture origin, partly because of uncertainty in theoretical predictions. Here we present six indicators of electron-capture supernovae and show that supernova 2018zd is the only known supernova having strong evidence for or consistent with all six: progenitor identification, circumstellar material, chemical composition5,6,7, explosion energy, light curve, and nucleosynthesis8,9,10,11,12. For supernova 2018zd, we infer a super-asymptotic giant branch progenitor based on the faint candidate in the pre-explosion images and the chemically-enriched circumstellar material revealed by the early ultraviolet colours and flash spectroscopy. The light-curve morphology and nebular emission lines can be explained by the low explosion energy and neutron-rich nucleosynthesis produced in an electron-capture supernova. This identification provides insights into the complex stellar evolution, supernova physics, cosmic nucleosynthesis, and remnant populations in the transitional mass range. Copyright © 2020, The Authors. All rights reserved.

关键词： Supernovae

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Water absorption and its effect on the tensile properties of tapioca starch/polyvinyl alcohol bioplastics

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IOP Conference Series: Materials Science and engineering 2017年第1期223卷

作者： H Judawisastra R D R Sitohang L Marta Mardiyati Materials Science and Engineering Research Groups Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung Ganesha 10 Bandung 40132. Alumni of Materials Science and Engineering Study Program Institut Teknologi Bandung Bandung Indonesia

Tapioca is one of the largest sources of starch and makes it suitable to be used for bioplastic material. Addition of polyvinyl alcohol (PVA) has been shown to successfully reduce the brittleness of starch bioplastic. This study aims to investigate the influence of PVA addition to water absorption behavior and its effect on the tensile properties of tapioca starch/PVA bioplastics, which are still not yet fully understood until now. The bioplastics were prepared by solution casting method at gelatinization temperature, with PVA addition from 0 to 29 wt%. Examinations were carried out by means of water absorption test, tensile test and Fourier Transform Infrared (FTIR) Spectroscopy. Increasing content of PVA, up to 29 wt%, was found to decrease the water absorption of the bioplastics, with the lowest water saturation point of 251%. This is due to the interaction between starch and PVA which reduces the free OH groups in the resulting bioplastics. Consequently, this led to a decrease in water absorption-related deterioration, i.e. tensile properties degradation of the bioplastics. The addition of 29 wt% resulted into the lowest degradation in tensile strength (6%) and stiffness (30%), while accompanied with the highest elongation increase (39%) after water immersion.

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Ambient Noise Tomography of Merapi Complex, Central Java, Indonesia: A Preliminary Result

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IOP Conference Series: Earth and Environmental Science 2017年第1期62卷

作者： Massita Putriastuti Tedi Yudistira Andri Dian Nugraha Sri Widiantoro Jean-Philippe Metaxian Master Program of Geophysical Engineering Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung 40132 Bandung Indonesia. Global Geophysics Research Group Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Bandung 40132 Indonesia ISTerre IRD R219 CNRS Université de Savoie Le Bourget-du-Lac France

Mt. Merapi is one of the most active and hazardous volcanoes not only in Indonesia but also in the world. Having a height of about 2968 meter above sea level it contains an active lava dome, which regularly produces pyroclastic flows and is categorized as a stratovolcano. It erupts on average every 2-5 years, in which thousands of people live on the flanks of the volcano. The last eruption occurred on 26 October 2010 and after the large eruption in 2010 the characteristic of Mt. Merapi was changed. Due to its uniqueness, Merapi is closely monitored by the many geoscientists, particularly through volcanological *** study is concerned with the application of ambient noise tomography (ANT) to create Rayleigh wave group velocity maps around Mt. Merapi. The continuous data set is taken from the DOMERAPI project, which consists of temporary seismic array of 40 broadband seismometers for approximately ten months. The resulting group velocity maps of Rayleigh wave show an anomaly pattern that agrees with previous geological and geophysical study results. A pronounced, positive anomaly is clearly imaged with direction about 152°N beneath Mt. Merapi through to Mt. Merbabu. In addition, negative anomalies are observed in its east and west flanks.

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