bluuebunny/crossref_metadata_2025 huggingface dataset:
Relationship between Obesity and Periodontal Status in Vietnamese Patients: A Pilot Study
Authors: Pham Thuy Anh Vu , Nguyen Xuan Ngoc Thi
Published: July 2019

Objectives

To investigate periodontal status and the relationship between obesity and periodontal status in female patients who first visited the Traditional Medicine Institute, Ho Chi Minh city, Vietnam.

Materials and methods

One hundred and three female patients aged 18 or older, including 45 obese subjects and 58 nonobese subjects were enrolled in a period of 5 months from February to June 2014. The information on sociodemographic characteristics and dental habits were collected by questionnaire. Periodontal status [plaque index (PI1), gingival index (GI), bleeding on prabing (BOP), pocket depth (PD), clinical attachment level (CAL)] was examined and the anthropometric index was measured.

Results

There was significantly higher prevalence of periodontitis (40.0%) in obese females than nonobese females (13.8%). The means values of periodontal parameters in obese females were significantly higher than those in nonobese females. Significantly, higher percentage of subjects who did not use dental flossing, or less regularly visited dental offices, or less regularly had their teeth scaled and polished was in the obese group than those in the nonobese group. Multiple logistic regression analysis revealed that age [odds ratio (OR = 3.60)], routine of dental visit (OR = 3.75) and obesity (OR = 3.46) were significantly related to periodontitis.

Conclusion

Periodontal status in obese subjects was poorer than nonobese ones. Obesity, age and dental visit were associated with periodontitis in Vietnamese female patients.

How to cite this article

Pham TAV, Nguyen XNT. Relationship between Obesity and Periodontal Status in Vietnamese Patients: A Pilot Study. Int J Experiment Dent Sci 2015;4(2): 119-123.
Asymptomatic Large Sialolith of Wharton's Duct
Authors: Azimi Somayyeh , Begom Jamileh Taheri , Rankohi Zahra Elmi
Published: July 2019

Aim

Giant salivary gland stones (more than 15 mm) considered to be rare and a few of well-documented studies report it. In this literature, we report an asymptomatic, 15 mm sialolith in a 47-year-old man with whole procedure of treatment.

Materials and methods

A patient without symptom of Wharton's duct sialolith was detected and treated. Occlusal cross-sectional of mandibule film was used to guide of surgery, transoral approach was made to dissection of stone.

Results

Fifteen millimeters yellow sialolith was obtained, antibiotic therapy done for 1 week was after surgery and 2-month follow-up was done.

Conclusion

Sialoliths are responsible for the obstruction of salivary secretion. More than 80 to 90% of sialoliths, occurs in the submandibular glandular parenchyma or its duct. There is man predilection in parotid or submandibular sialolith. Giant salivary gland stones (more than 15 mm) considered to be rare and a few of well-documented studies report it. Removal of sialolith with intraloral approach is treatment of choice in the anterior duct submandibular gland.

How to cite this article

Begom JT, Azimi S, Rankohi ZE. Asymptomatic Large Sialolith of Wharton's Duct. Int J Experiment Dent Sci 2015;4(2):143-145.
Potential Risk of Prion Transmission during Periodontal Surgeries
Authors: Ganesh PR
Published: July 2019

Prion diseases are a cluster of neurodegenerative diseases seen in both animals and humans and are often invariably fatal. The defining characteristic of prion diseases are the accumulation of abnormal prion proteins in the central nervous system. The prion proteins are not decontaminated with conventional sterilization procedures and persist on metal instruments in contact with infected materials, thus giving rise to queries on cross-contamination during periodontal surgical procedures. This article is a review of literature of prion diseases, collected using the search engines of PubMed and Medline, to analyze the oral manifestations of prion diseases and to investigate the possibility of cross-contamination during periodontal therapy. We conclude by highlighting the need for awareness of prion diseases by periodontists and suggest appropriate decontamination procedures to prevent iatrogenic spread.

Key message

Iatrogenic transmission during regenerative periodontal surgeries with alloplasts and zoografts along with cross-contamination from previously used inadequately disinfected surgical instruments constitutes a very real risk for prion infection transmission in the periodontal office.

How to cite this article

Ganesh PR. Potential Risk of Prion Transmission during Periodontal Surgeries. Int J Experiment Dent Sci 2016;5(1):60-63.
Restoration of Mutilated Primary Maxillary Incisors using Biological Restorations under General Anesthesia
Authors: Kumar R Kranthi , Reddy BV Thimma , Nayan Neha
Published: July 2019

Restoration of grossly mutilated primary maxillary incisors affected by early childhood caries has been a challenging task for the pediatric dentist due to the little amount of tooth structure available for bonding and behavioral problems of the children. A variety of treatment options ranging from extraction followed by prosthesis to the usage of intracanal pins and fiber posts have been reported in the past. The present case report depicts one such a case wherein biological restorations were used as post and core to restore the mutilated primary maxillary incisors in a 4-year-old child treated under general anesthesia.

How to cite this article

Kumar KR, Reddy BVT, Nayan N. Restoration of Mutilated Primary Maxillary Incisors using Biological Restorations under General Anesthesia. Int J Experiment Dent Sci 2016;5(1):72-75.
Platelet-rich Fibrin Influences on Proliferation and Migration of Human Gingival Fibroblasts
Authors: Pham Thuy Anh Vu , Nguyen Hao TT , Nguyen My TN , Trinh Van NL , Tran Nga Y , Ngo Lan TQ , Tran Ha LB
Published: July 2019

Aims

Our study focused on the fabrication of platelet-rich fibrin (PRF) and evaluated its influences on cell behaviors, including proliferation and migration.

Materials and methods

Platelet-rich fibrin was prepared from human peripheral blood according to Choukroun's method without using nonanticoagulant and foreign factors for platelet activation. Platelet-rich fibrin architecture was studied by hematoxylin and eosin staining. The investigation of PRF effects on human gingival fibroblasts (hGFs) was conducted via PRF liquid extract. Cell proliferation was determined via the number of cells after a period of time incubated in PRF liquid extract. Influence of PRF liquid extract on the migration of hGFs was conducted via scratch wound healing assay.

Results

Histological staining reviewed the natural fibrin fiber matrix of PRF. Platelet-rich fibrin liquid extract promoted hGF proliferation after 7 days of cultivation. Human gingival fibroblast proliferation in PRF liquid extract was more superior than those cultured in complete medium. Platelet-rich fibrin was also found to be able to promote the migration of hGFs for up to 48 hours.

Conclusion

These results indicated that PRF is suitable to be used as autologous natural biomaterial in supporting wound healing and in further application in periodontitis treatments.

How to cite this article

Nguyen HTT, Nguyen MTN, Trinh VNL, Tran NY, Ngo LTQ, Pham TAV, Tran HLB. Platelet-rich Fibrin Influences on Proliferation and Migration of Human Gingival Fibroblasts. Int J Experiment Dent Sci 2016;5(2):83-88.
Esthetic Rehabilitation of an Orbital Defect Secondary to Surgical Management of Rhabdomyosarcoma
Authors: Kumar KV Arun , Legha Virender S , Sarkar Abir , Chahar Pramod K , Wadhwa Vinay N , K Saini Dinesh
Published: July 2019

Rehabilitation of facial defects is an exigent task for the prosthodontist requiring an innovative design and technique for each patient. The disfigurement associated with the loss of an eye may result in significant physical and emotional problems. The placement of an artificial prosthesis serves a great psychological, social, and cosmetic benefit to the patient. The present article describes a straightforward technique for the fabrication of a silicone orbital prosthesis retained using spectacle in a patient who had undergone exenteration of the right eye due to rhabdomyosarcoma.

How to cite this article

Wadhwa VN, Kumar KVA, Legha VS, Saini DK, Chahar PK, Sarkar A. Esthetic Rehabilitation of an Orbital Defect Secondary to Surgical Management of Rhabdomyosarcoma. Int J Experiment Dent Sci 2017;6(2):108-110.
Role of Intraoperative Transesophageal Echocardiography in Evaluation of Fontan Conduit for Thrombosis
Authors: Ladha Suruchi , Airan Balram , Das Sambhunath
Published: July 2019

The formation of thrombus after Fontan operation is a lifethreatening situation. The clinical manifestations by the patient may not reflect the true diagnosis of thrombosis. Transesophageal echocardiographic evaluation is an option to delineate the vena cava anastomosis and the Fontan conduit in different views. We used transesophageal echocardiography (TEE) to detect the thrombus site prior to surgery and guided for a successful removal of thrombus. The successful surgical revision of the anastomosis was confirmed by TEE.

How to cite this article

Das S, Ladha S, Airan B. Role of Intraoperative Transesophageal Echocardiography in Evaluation of Fontan Conduit for Thrombosis. J Perioper Echocardiogr 2015;3(2):55-57.
Pulmonary Artery Perforation: Rare reported Complication of Pericardiectomy for Chronic Constrictive Pericarditis recorded on Transesophageal Echocardiography
Authors: Taneja Sameer , Narula Jitin , Makhija Neeti , Hote Milind P
Published: July 2019

Major vessel injury is a possible complication during pericardiectomy for chronic constrictive pericarditis (CCP). We present a case of CCP, who while undergoing radical pericardiectomy incurred an iatrogenic injury of a major vessel with profuse bleeding. A rent in main pulmonary artery (MPA) was detected by the surgical team and simultaneously confirmed on transesophageal echocardiography (TEE), and a timely intervention was done. Importance of monitoring TEE in a patient undergoing pericardiectomy for CCP is highlighted.

How to cite this article

Makhija N, Narula J, Kumar S, Taneja S, Hote MP. Pulmonary Artery Perforation: Rare reported Complication of Pericardiectomy for Chronic Constrictive Pericarditis recorded on Transesophageal Echocardiography. J Perioper Echocardiogr 2016;4(1):17-18.
Revitalization of periodontally Compromised Tooth using Platelet-rich Fibrin
Authors: Anuroopa P , Savita S , Singh Navnita
Published: July 2019

The primary objective of periodontal therapy is to gain access to the diseased sites, achieving reduction in pocket depth, arresting further disease progression, and finally restoring the periodontal tissues lost due to disease process. This can be achieved with the help of bone grafts and guided tissue regeneration. In recent times, the use of growth factors in different forms has been advocated to regulate various cell-stromal interactions in periodontal regeneration.

Platelet-rich fibrin (PRF), a rich source of autologous growth factors and cytokines, is an upcoming therapeutic approach in the management of periodontal osseous defects. Platelet-rich fibrin along with the commercially available bone grafts provides a potential for enhanced bone and soft tissue regeneration. This case report focuses on saving a mandibular anterior tooth with poor prognosis using PRF and alloplast bone graft to meet with the esthetic demand of patients.

How to cite this article

Singh N, Anuroopa P, Savita S. Revitalization of periodontally Compromised Tooth using Platelet-rich Fibrin. J Health Sci Res 2016;7(2):63-66.
Management of Hemophilia Patient
Authors: Bhoboo Priyanka R , Felix Kishore , Ranganatha Narahari , Nanjappa Mamtha S
Published: July 2019

Hemophilia comprises a group of hereditary bleeding disorders caused due to the deficiency of one or more clotting factors. It is classified as hemophilia A, B and C which occur due to deficiency of factor VIII, IX or X respectively. Hemophilia A is an X-linked recessive hereditary disorder and most common of the three. It accounts for 80 to 85% of bleeding disorder. It is of paramount importance to know this medical condition to provide dental treatment and to prevent undesirable events. The aim of this article is to report a case of hemophilia A, who was diagnosed postextraction with review of dental management of hemophilic patients.

How to cite this article

Nanjappa MS, Bhoboo PR, Felix K, Ranganatha N. Management of Hemophilia Patient. J Health Sci Res 2017;8(2):72-76.
O "Alasca brasileiro": debates sobre a autonomia do Acre na imprensa e no Congresso Nacional em 1909
Authors: Vital André Vasques
Published: July 2019

O objetivo deste artigo é analisar os debates frente à situação jurídica do Território Federal do Acre e as reivindicações locais por autonomia econômica e política no início do século XX. Para tanto, foi analisada uma polêmica envolvendo a imprensa carioca e o deputado federal Justiniano José de Serpa (1852-1923). Em 22 de novembro de 1909, Serpa proferiu um discurso na Câmara federal traçando uma ampla comparação entre o Território Federal do Acre e o então Distrito do Alasca para repudiar a possibilidade de elevação do Acre a estado da Federação. Este artigo sugere que a imagem do Acre como o “Alasca brasileiro” adquiriu diferentes significados e converteu-se, sobretudo, em instrumento de pressão dos autonomistas do Acre pela conquista de mais direitos políticos e recursos do governo federal em paridade com as medidas adotadas pelos EUA em suas terras no Ártico.
La vereda: Del camino al lugar, una multiplicidad de territorialidades rurales
Authors: Vargas G. Bibiana
Published: July 2019

El objetivo de este artículo es reflexionar sobre la vereda en Colombia, a través del cual se puede dar cuenta de los cambios y transformaciones geográficas, históricas y sociopolíticas que se han dado en el medio rural colombiano. Así, en la convergencia de lo local y lo global, lo tradicional y lo moderno, el adentro y el afuera, lo propio y lo ajeno, se configura una multiplicidad de territorialidades que delimitan, controlan y dan sentido de lugar. Para ello se hace una revisión documental que muestre diferentes acercamientos al concepto de vereda y se establecen los principales elementos conceptuales que enmarcan el estudio en mención. Como categoría territorial la vereda no es solo una división del espacio rural, es también un espacio de relacionamiento social, cultural y político. La vereda corresponde no solo a características físicas y geográficas, sino también a los posibles sentidos y significados que, a partir de vínculos sociespaciales establecidos, le dan quienes allí habitan y que persisten en el marco de una sociedad globalizada.
Despojo extractivista y exclusión social con presencia y consentimiento del Estado. Integración subordinada del norte paraguayo
Authors: Pereira C. Hugo
Published: July 2019

La violencia en el norte de Paraguay, en los últimos años, es atribuida a supuestos grupos insurgentes que cuentan con el apoyo de la población campesina, producto a su vez de la histórica ausencia del Estado. Sin embargo, esta explicación, obvia, que el poder estatal tuvo activa presencia en la zona desde la misma era colonial en que puso en funcionamiento mecanismos para proteger el territorio, entonces español, ante el avance portugués. Reprimió, además, la defensa ejercida por la población indígena que vio acaparadas sus tierras por los conquistadores. El mismo Estado paraguayo acordó, posteriormente, una integración subordinada del norte del país a Brasil, mediante obras de infraestructura vial que posibilitaron la radicación de inversiones del capital brasileño y transnacional. Las denuncias de los impactos negativos de las actividades extractivas instaladas en el área, son actualmente criminalizadas y reprimidas por las instituciones estatales de seguridad.
Descampesinización, política de restitución de tierras y resistencias en la subregión de Montes de María, Colombia
Authors: Ferro Medina Juan Guillermo
Published: July 2019

A través del seguimiento a cinco comunidades campesinas reclamantes, este artículo muestra cómo la política de restitución de tierras en la región colombiana de Montes de María no está revirtiendo el proceso de descampesinización que se aceleró desde inicios del siglo XXI con la violencia paramilitar, el desplazamiento forzado y el despojo de tierras. Los problemas burocráticos, las asimetrías de poder frente a los opositores, el crecimiento acelerado (con apoyo del Estado) de los monocultivos empresariales de exportación, la falta de una articulación entre la política de restitución y la de desarrollo rural y la continuidad del despojo de la tierra y del agua son algunos de los factores analizados como impedimentos para una restitución de tierras efectiva para comunidades rurales campesinas y étnicas. Además, se analiza el resurgimiento, pese al contexto anterior, de algunos procesos destacados de resistencia campesina en la región. Así, se muestra la riqueza de sus estrategias y repertorios configurando una lucha que permite mantener la esperanza de la continuidad de la vida campesina en Montes de María.
Estrategias tecnológicas diferenciadas para pequeños productores de ganado bovino en Sinaloa, México
Authors: Cuevas Reyes Venancio , Loaiza Meza Alfredo , Reyes Jiménez Juan Esteban , Moreno Gallegos Tomás , Servín Juárez Roselia
Published: July 2019

El objetivo del estudio fue diseñar una estrategia de utilización de componentes tecnológicos para pequeños ganaderos del sistema de producción bovinos doble propósito en Sinaloa, México; con la finalidad de mejorar su productividad. Para el análisis y planteamiento de las estrategias diferenciadas se siguió la caracterización general de cuatro etapas propuestas por Parsons. Mediante el análisis de fuentes secundarias y reuniones del grupo de trabajo se diseñó un esquema de transferencia de tecnología para pequeños productores ganaderos, los cuales representan el 67 % del total estatal, teniendo un promedio de edad de 51.5 ± 14.4 años, 21.4 ± 10.1 unidades animal (UA) y 26.9 ± 16.0 hectáreas dedicadas a la producción ganadera. La alimentación del ganado está asociada a tres épocas durante el año; época de sequía, de lluvias y humedad residual, en la cual el uso de rastrojos de maíz y sorgo, pastoreo de vegetación nativa y uso del bosque tropical caducifolio desempeñan un papel relevante. El proceso de estabilización productiva se alcanza entre 5 y 7 años de implementación gradual de tecnología. Las estrategias diferenciadas deben ir acompañadas de componentes tecnológicos y apoyos de política pública específicos para cada tipo de productor, con la finalidad de elaborar "trajes a la medida" y así mejorar las condiciones de los pequeños productores de ganado involucrados.
Importancia del agua en las luchas socioambientales frente a la minería en México
Authors: Rodríguez Wallenius Carlos A.
Published: July 2019

Estudios recientes han mostrado que la minería no solo es una de las más grandes consumidoras de agua, sino que es la gran concentradora de concesiones hídricas de nuestro país. Esta situación pone en relieve uno de los ejes de las luchas socioambientales entre las comunidades donde están los yacimientos y las empresas mineras, puesto que el modelo extractivo minero representa en su conjunto una modalidad económica excluyente y que destruye las bases de vida campesina.
Los impactos socioambientales que provoca la actividad minera se refieren a la apropiación de las fuentes de agua, la sobreexplotación de los mantos acuíferos, agotamiento de manantiales y arroyos, y la contaminación de líquido. Para las comunidades esto resulta fundamental pues el agua es un elemento esencial para la vida campesina, no solo porque es vital para la alimentación, salud y sobrevivencia de las personas, sino también para la continuidad de las formas agroproductivas así como para mantener los ecosistemas. Esta preocupación se refleja en las argumentaciones de las luchas socioambientales comunitarias, que cuestionan las actividades mineras en sus territorios, como se muestran en varias luchas en el país, lo que pone énfasis en la importancia del agua para la vida de los pueblos.
La Oficina del Níger: Entre la cooperación y la imposición de proyectos de desarrollo hidroagrícola en Malí
Authors: Diaraba Keita Zoumana , Santacruz de León Germán , Cámara Córdova Julio
Published: July 2019

Se describe la evolución de las políticas de desarrollo en el delta interior del río Níger, del Sudán francés a la actual República de Malí. Se analizan proyectos de desarrollo (destacando la Oficina del Níger, ON) y sus propuestas sobre el uso del suelo, la tenencia de la tierra y el acceso al agua, así como sus consecuencias para la población local, los colonizadores históricos o los inversionistas contemporáneos. Las consideraciones finales reconocen que el arrendamiento de tierras a gran escala para proyectos hidroagrícolas, implica riesgos significativos para agricultores y recursos del área de influencia de la ON y que la población local es escéptica sobre sus beneficios, pues no conocen inversionistas Malienses con capital suficiente para incrementar las tierras y tienen la impresión de que las políticas públicas nacionales e internacionales, favorecen esquemas históricos de explotación, donde el Níger es medio de saqueo; que los planes de desarrollo no incluyen políticas para beneficio de los habitantes del área de la ON, y que las reformas propician la privatización o la implicación del sector privado, en la gestión de los recursos naturales como el agua.
Análisis del marco normativo en los megaproyectos: La evaluación de impacto social (EVIS)
Authors: Olmedo Neri Raul Anthony
Published: July 2019

La lógica capitalista, entendida como proceso holístico que conjunta producción, circulación, consumo y reproducción, se encuentra en un proceso constante de actualización y transformación que busca mantener e incrementar su tasa de ganancia y no autodestruirse en el proceso. En este sentido, los megaproyectos que se inscriben en el desarrollo de energías renovables representan un ejemplo claro de la búsqueda constante del capital por crear espacios de acumulación, sin modificar la relación depredadora que ejerce sobre la naturaleza de manera general y de la ruralidad en particular.
Así, en el presente trabajo se analiza el marco jurídico que existe en México respecto a la regulación sobre este tipo de megaproyectos en el ámbito social, siendo la Evaluación de Impacto Social (EVIS) un trabajo que la industria privada presenta como requisito ante la Secretaría de Energía (SENER) para obtener el permiso de establecimiento, instalación y producción de energía con base en recursos renovables en el país.
Con este análisis se identifican las debilidades metodológicas y prácticas que este tipo de evaluación presenta y se proponen lineamientos para que tanto el proyecto como sus promotores tengan contrapesos en la sociedad potencialmente afectada, a través de mecanismos de evaluación sobre los cambios que se crean derivados de las transformaciones en el espacio físico y el mundo de la vida de las comunidades cercanas al mismo.
Inferring the anthropogenic NOx emission trend over the United States during 2003–2017 from satellite observations: Was there a flattening of the emission tend after the Great Recession?
Authors: Li Jianfeng , Wang Yuhang
Published: July 2019

Abstract. We illustrate the nonlinear relationships among anthropogenic NOx emissions, NO2 tropospheric vertical column densities (TVCDs), and NO2 surface concentrations using model simulations for July 2011 over the contiguous United States (CONUS). The variations of NO2 surface concentrations and TVCDs are generally consistent and reflect well anthropogenic NOx emission variations for high-anthropogenic-NOx emission regions. For low-anthropogenic-NOx emission regions, however, nonlinearity in the emission-TVCD relationship makes it difficult to use satellite observations to infer anthropogenic NOx emission changes. The analysis is extended to 2003–2017. Similar variations of NO2 surface measurements and coincident satellite NO2 TVCDs over urban regions are in sharp contrast to the large variation differences between surface and satellite observations over rural regions. We find a continuous decrease of anthropogenic NOx emissions after 2011 by examining surface and satellite measurements in CONUS urban regions, but the decreasing rate is lower by 9 %–46 % than the pre-2011 period.
Regional scenarios of change over Canada: future climate projections
Authors: Asong Zilefac Elvis , Elshamy Mohamed , Princz Daniel , Wheater Howard , Pomeroy John , Pietroniro Alain , Cannon Alex
Published: July 2019

Abstract. This analysis documents projected changes in daily precipitation and temperature characteristics over Canada based on a 15-member ensemble which had been downscaled using the Canadian Regional Climate Model–CanRCM4 at 50 km resolution by the Canadian Centre for Climate Modelling and Analysis (CCCma) under Representative Concentration Pathway (RCP) 8.5. In this study, the historical CanRCM4 simulations are first compared against observations for validation purposes. Then, a multivariate bias correction algorithm is applied to the CanRCM4 outputs to adjust the data against the EU WATCH Forcing Data ERA-Interim reanalysis (WFDEI). We analyze changes in mean and extremes for two 30-year non-overlapping future periods: 2021–2050 and 2071–2100 relative to 1979–2008. The results indicate that daily mean precipitation is projected to increase over Canada, with larger increases expected in the 2080s. However, decreases are projected in summer precipitation over the Canadian Prairies by the year 2100. Mean air temperature is projected to intensify towards the northern high latitude regions, particularly in the winter season. Precipitation and temperature extreme events may increase more than the mean. By examining the behavior of precipitation distribution tails, the mean of the probability distributions of wet extremes over the Saskatchewan (SRB) and Mackenzie River basins (MRB) is projected to shift to the right with global warming. For temperature extremes, minimum temperature may warm faster compared to daily maximum temperatures, particularly in the winter and towards the Arctic region.
Combining Location2Vec with LSTM to predict next locations from trajectory data
Authors: Han Shanshan , Ren Fu , Du Qingyun
Published: July 2019

Abstract. Research on human location prediction is beneficial personalized location recommendations, location-based advertising, and ride-sharing services. The prediction of future locations is generally based on historical trajectory data. With the development and prevalence of mobile sensors, large volumes of data that can capture human trajectories are generated and provide researchers with more adequate and accurate data to study human trajectories and location predictions. In this paper, we propose a model containing long short-term memory (LSTM) to understand historical trajectories and predict future locations. LSTM is a special recurrent neural network (RNN) architecture that contains three gates and one internal state to control the storage of information. Additionally, we leverage the LINE (Large-scale Information Network Embedding), an embedding method to transform vertices into large scale networks, to transform locations into spatial vectors according to their distance information, which we name it “Location2Vec”. By feeding the summation of the dynamic location embeddings and pre-trained Location2Vec embeddings into LSTM model, it can effectively predict next locations of a trajectory and improve the predicting accuracy. Finally, we verify the reliability of the model, and the results show that our model outperforms other traditional trajectory models.
Mapping Heterotopia: Port B’s Excavation of Asia in Tokyo
Authors: Hayashi Sharon
Published: July 2019

Abstract. The term mapping can literally mean the pinpointing of coordinates on a map, but also the more general task of taking stock of what can be seen and the frameworks that limit or expand that vision. For French philosopher Jacques Rancière, asking the question ‘Where are we?’ means two things at once: “how can we characterize the situation in which we live, think and act to-day?” but also, by the same token, “how does the perception of this situation oblige us to reconsider the framework we use to “see” things and map situations, to move within this framework or get away from it?” In other words, “how does it urge us to change our very way of determining the coordinates [not just of the map but] of the “here and now”?”The Tokyo based collective Port B, led by Akira Takayama, has inventively used tour performances as a process of mapping, of transforming the frameworks that shape our understanding of everyday spaces in the city. Port B’s smartphone application Tokyo Heterotopia is a self-guided tour of 13 ‘locations of difference’ that emphasizes not only the spatial but also the historical dimension of mapping. Based on the premise of a fake Asian gourmet tour, it encourages users to reconsider in a tactile way the historical significance, presence and personal histories of Asian immigrants to Tokyo. Users navigate themselves to locations across Tokyo, including Asian restaurants, food stalls, supermarkets, and student dormitories. These nondescript sites are made visible not by markers or monuments but by the user’s presence which triggers dramatized stories of personal narratives of migration to Tokyo and their relationship to wider global forces of colonialism, capitalism and postwar independence movements. Tokyo Heterotopia rewrites the history of Asia in Tokyo “media artistically, that is, taking into account the materialities through which history is articulated, not relying on written narrative as the only way of producing historical, temporal knowledge.” Tokyo Heterotopia immerses the user not only in the heterogenous elements or ‘locations of difference’ of the city, but in a heterochronia where the overlooked past can be joined with the experience of the everyday in the present to incrementally re-map our understanding of the city.
Validity of using of GIS, SDI, Remote Sensing and Environmental factors for site selection of zones of coffee agriculture localization suitability modeling in Maraba sector, south province of Rwanda
Authors: Hitimana Jean Pierre
Published: July 2019

Abstract. In these last recent years farmers in the sector of Maraba in South Province of Rwanda had face challenges to keep producing good quality coffee and to be the 1st place in competition of cup of Excellence. We conducted this research in order to show how the use of Geographic Information Systems (GIS) and Spatial Data Infrastructure (SDI) models as the research method for growing and producing good quality coffee in taking into consideration environmental factors like: Elevation and temperature, Rainfall and water supply, Soil, Aspect and slopes.The findings in this research about the selection of zones of coffee plantation and relation relationship to coffee quality will be published on Geo-Portal where maps and metadata created or collected will be available to the public and particularly to Maraba sector community.The results of this research will be presented to Maraba sector community in a workshop so that they can gain knowledge of the land and the good quality of Maraba coffee.
Ecological Change Analysis of Lanzhou City Based on Remote Sensing Ecological Index
Authors: Huang Yuhan , Yan Haowen
Published: July 2019

Abstract. Lanzhou City is the capital of Gansu Province and located in the semi-arid of northwest China. The Yellow River passing through the inner city from west to east, which has formed a special ecological environment. In recent years, the economic level of Lanzhou City has continued to develop, and the degree of urbanization has been continuously improved, which has had a certain impact on the ecological environment of the city. This paper used the Remote Sensing Ecology Index (RSEI) model (Xu, H.Q.,2013) to assess the ecological changes of the four major urban areas Chengguan District, Qilihe District, Anning District and Xigu District of Lanzhou from 2013 to 2017, and evaluate the current ecological environment of the city to provide a basis for the sustainable development of the city.
Potential of Digital Elevation Topographic Maps reveal the history of the region: comparing Those Maps with Marsh data in the early Meiji Period
Authors: Ideto Masatoshi , Kurisu Yuki , Toishigawa Hideyuki
Published: July 2019

Abstract. Landform of lowland is remains of the natural disasters and the history. Residents of this area are influenced of the landform with history of natural disaster. Therefore, there is an inseparable relationship between topography and social life. At Geospatial Information Authority of Japan (GSI), we are creating Thematic maps which clearly express topographic information. We also create, Thematic maps which distinguish the topography from the formation of the land. New findings can be obtained by considering these thematic maps in combination. In this paper, we study the relationship between landform and history of Tokyo by comparing “Digital Elevation Topographic Map” and “Marsh data in the early Meiji Period”. (This early Meiji Period here is the 1880s.)
Mapping foreign residents in Japan’s major cities
Authors: Ishikawa Yoshitaka
Published: July 2019

Abstract. Japan’s population has been declining since it reached its peak in 2008, and the annual decrease is expected to expand gradually in the future. In this situation, improvement in the fertility rate and intake of foreigners have attracted great attention. However, since the total fertility rate (TFR) has remained stagnant between 1.40 and 1.45 in recent years, more attention is being paid to the role of foreigners as “replacement migration,” and the importance of this has even been highlighted by the United Nations (2001). Noteworthy trends in relation to this are the regional disparity of population decline and the distribution of foreign nationals in contemporary Japan. In particular, the issue of depopulation is serious in peripheral parts of the country because it has been occurring since the 1980s. Meanwhile, the monopolar concentration of population, including foreign residents, into Tokyo has also been a major issue.Keeping the above developments in mind, the first edition of Mapping Foreign Residents in Japan, which I edited, was published in 2011; thanks to its favourable reception, a revised edition was published in January 2019. Both editions were prepared especially for policy-makers of national and local government offices in charge of foreign residents. It includes more than 100 maps. This presentation aims to introduce the maps that visualize the status of foreign residents in Japan’s major cities and to outline the distinctive features of the differentiation in their residential distribution.The work’s chief sources are national government statistics such as population census (including microdata of foreign residents in the 2015 census), statistics on foreign residents, and vital statistics. The maps are arranged by six topics (distribution/changes, gender/age/nationality, status-of-residence, employment, life, and enclaves/migration), and each topic has several sub-topics. Maps of foreign residents in major cities are drawn on a municipality basis (city, ward, town, and village) or on a small-area unit basis (cho-cho and aza). Figure 1 shows an example from the second edition.Major findings obtained from the series of maps in the recently revised publication are summarized as follows.First, there are very few remarkably large enclaves composed of small-unit areas with a high ratio of foreign residents, suggesting that most foreign residents, even in such areas, tend to reside alongside Japanese residents. Second, major enclaves for ‘oldcomers’ (Korean and Chinese residents) are located in the inner-city areas of a few metropolises. Third, major enclaves for newcomers are confirmed to exist in four types of small-area units: downtown, public housing, around universities, and around factories.
A note on the Relationship between Spatial Recognition and Behavior while Walking in the City
Authors: Ito Kaori , Sakurai Yusuke , Fujita Yuri , Burgess Andrew
Published: July 2019

Abstract. The experience of walking in the city has changed since the diffusion of smartphones with communication and GNSSbased navigation technologies. Accordingly, user's recognition of geographical space has also been changed; McCullough and Collins (2018) suggest that less spatial knowledge is gained while using GNSS-equipped devices while way-finding than by using paper maps or no tools at all; Ishikawa et al. (2008) suggest that GNSS-based navigation device users make larger direction errors and produce sketch maps with poorer topological accuracy after way-finding.This study focuses on information gathering, decision-making and recognition of geographical space while ‘strolling’ in the city with a smartphone. This abstract describes the outline of the experiment and early stages of the analysis, especially relationships between spatial recognition through sketch maps and behavior while walking.
Visual-Inertial Odometer-Based Global High Precision Indoor Human Navigation in a University Library
Authors: Ito Shinpei , Takahashi Akinori , Si Ruochen , Arikawa Masatoshi
Published: July 2019

Abstract. AR (Augmented Reality) could be realized as a basic and high-level function on latest smartphones with a reasonable price. AR enables users to experience consistent three-dimensional (3D) spaces co-existing with 3D real and virtual objects with sensing real 3D environments and reconstructing them in the virtual world through a camera. The accuracy of sensing real 3D environments using an AR function, that is, visual-inertial odometer, of a smartphone is extremely higher than one of a GPS receiver on it, and can be less than one centimeter. However, current common AR applications generally focus on “small” real 3D spaces, not large real 3D spaces. In other words, most of the current AR applications are not designed for uses based on a geographic coordinate system.We proposed a global extension of the visual-inertial odometer with an image recognition function of geo-referenced image markers installed in real 3D spaces. Examples of geo-referenced image markers can be generated from analog guide boards existing in the real world. We tested this framework of a global extension of the visual-inertial odometer embedded in a smartphone on the first floor in the central library of Akita University. The geo-referenced image markers such as floor map boards and book categories sign boards were registered in a database of 3D geo-referenced real-world scene images. Our prototype system developed on a smartphone, that is, iPhone XS, Apple Inc., could first recognized a floor map board (Fig. 1), and could determine the 3D precise distance and direction of the smartphone from the central position of the floor map board in a local 3D coordinate space with the origin point as the central positon of the board. Then, the system could convert the relative precise position and the relative direction of the smartphone’s camera in a local coordinate space into a global precise location and orientation of it. A subject was walking the first floor in the building of the library with a world tracking function of the smartphone. The experimental result shows that the error of tracking a real 3D space of a global coordinate system was accumulated, but not bad. The accumulated error was only about 30 centimeters after the subject’s walking about 30 meters (Fig. 2). We are now planning to improve our prototype system in the accuracy of indoor navigation with calibrating the location and orientation of a smartphone based sequential recognitions of multiple referenced scene image markers which have already existed for a general user services of the library before developing this proposed new services. As the conclusion, the experiment’s result of testing our prototype system was impressive, we are now preparing a more practical high-precision LBS which enables a user to be navigated to the exact location of a book of a user’s interest in a bookshelf on a floor with AR and floor map interfaces.
Development of an online learning environment for geography and geology using Minecraft
Authors: Iwahashi Junko , Nishioka Yoshiharu , Kawabata Daisaku , Ando Akinobu , Une Hiroshi
Published: July 2019

Abstract. The purpose of this research is to give children a geographical viewpoint, and to encourage an interest in, and awareness of, landforms and geology. We created a system based on an exploration type computer game and verified the educational effects. Moreover, we aim to reach not only the virtual aspect but we also have a goal of creating interest in the actual field. As a secondary effect, by using a computer game that attracts children’s interest, we aim to make the experience of solving issues subjective and active even if the player is a passive child, a child with little inquiry, or a child who is not adept at self-assertion. With this new approach, we also hope to interact with young generations who usually do not interact with researchers.Many thematic maps of geography and geology are already published on the Web. They are popular among those who need to collect and view the information for some reason or with those who are interested in observing topographic maps and are interested in geology. However, in particular, the approach to children who do not have such motivation needs one more step: a mechanism to induce an inquiring mind, and a mechanism that leads to finding the information and having interest in the real field.The platform of this research is Minecraft Education Edition (Mojang/Microsoft). Minecraft is very popular game software which has exceeded one hundred million users worldwide in recent years, and in Japan there are many elementary and junior high school student enthusiasts of Minecraft. In the game a user explores a virtual world made of cubic blocks. The blocks imitate vegetation, rock formations, and other items, and can create various puzzles. In recent years, the release of the Education Edition assumes use in classrooms.In this research, we have constructed a virtual world tailored to a specific junior high school which teaches science classes to first grade students. First, we re-created the actual school buildings and also included the underground geologic strata based on data from boring. In addition, we created a mechanism to expand children’s imagination and knowledge about past environments which can be understood from the geological strata. We also provided checkpoints and gave challenges regarding knowledge about the formation of the land. Together with this modern world, we created ancient virtual worlds so users may understand the geological history around the school’s location.Through the experience of this research, we were able to confirm the mechanisms for promoting motivation in children and aiding their understanding of science. It can be applied to systems other than Minecraft, and it can contribute to educational support in a wide variety of fields.
Deformation Monitoring of Landslide Based on Adapted Distributed Scatter Interferometric Synthetic Aperture Radar
Authors: Jia Hongguo , Zhang Hao , Ren Wenjing , Yan Bin
Published: July 2019

Abstract. Landslide is a typical geological disaster, which may be caused by long-term heavy rainfall, human activities, and earthquakes. Landslides are extremely destructive so as to result in a serious threat to local public security. The deformation monitoring of landslide can provide an early warning and disaster prevention and mitigation measures. At present, the traditional landslide monitoring methods include absolute deformation monitoring, e.g. GPS surveying, total station and levelling， and relative deformation monitoring, e.g. displacement meter, crack meter and fiber optical sensors. Although these methods by ground measuring have the advantage of high precision, they can monitor only a limited number of points on the landslide body and need a large amount of field work and the high cost.In order to improve the accuracy of potential hazard of landslide detection and achieve deformation information for landslide areas, we proposed an adaptive distributed scatterer interferometric Radar method (ADS-InSAR), which can automatically adjust the detection threshold according to the spatiotemporal coherence of different distributed scatterer (DS) so as to improve the density and reliability of spatial distribution of DS. After the time series network modelling and deformation solution of the ADS are achieved, the displacement deformation details of the landslide area are extracted. In this paper, the experimental area of Shuibuya Town, Enshi Prefecture, Hubei Province, China was selected and the Sentinal-1A radar images data were used from March 5, 2016 to April 5, 2017. The ADS-InSAR method was utilized to obtain the subsidence time series of the region. The deformation time series is finally analysed combined with hydro meteorological and related data. Experimental results indicated that the method proposed in this paper can effectively improve the density of DS distribution and can successfully detect the existing ancient landslide group and find multiple suspected landslide areas for disaster warning, and has high reliability and accuracy in landslide disaster prevention and mitigation.
A Sustainable world with cartography
Authors: Kagawa Ayako , Eom Kyoung-Soo
Published: July 2019

Abstract. The 2030 Agenda for Sustainable Development or also known as the Sustainable Development Goals (SDGs) is the new global paradigm and blueprint to achieve a better and more sustainable future for all. To collectively achieve the SDGs, the global community agreed on 17 Goals as a baseline framework to measure and monitor its growth. How to measure and monitor development progress by countries has been a long-standing debate since the era of Millennium Development Goals (MDGs) in the 2000s but with the establishment of Inter-Agency and Expert Group on SDG Indicators (IAEG-SDGs), the SDGs have a clearer framework on how to monitor progress and the global community are grappling on how to effectively collect, analyse, visualise and report their successes.Within the United Nations, there is the desire to elaborate collectively principles and tools on how best to report the SDGs at country and local level as its success lies in the ownership and accountability at all levels. The Secretary-General of the United Nations is looking into how technologies can accelerate the SDGs and to facilitate the alignments with the values enshrined in the United Nations Charter, the Universal Declaration of Human Rights, and the norms and standards of International Laws.In this paradigm, what should be the role of cartographers and geospatial information management experts to ensure how maps and geospatial information can be effectively used by the global community to communicate their challenges and successes from planning to implementing, monitoring, analysing, visualising and reporting on sustainable development? This paper argues the importance of understanding the challenges, asking questions to the policy makers, sharing best practices and building a consensus on the issues surrounding the SDGs before demonstrating the diverse cartographic skills available to design and communicate the intended message better. Hence, the importance of context has never changed and provides the cartographic and geospatial information management community an opportunity to demonstrate the potential and to provide effective support through cartography for the accomplishment of the sustainable development agenda.