77 results on '"Gunawan, Hendra"'
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2. Von Neumann constant for weak Orlicz spaces and weak Lebesgue spaces.
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Ifronika and Gunawan, Hendra
- Abstract
In this paper we give some lower bounds of von Neumann-Jordan constant for weak Orlicz spaces and weak Lebesgue spaces. As an application, we prove that the von Neumann-Jordan constant for the weak Lebesgue space wLp tends to 2 as p tends to infinity. Our proof uses the refinement of the positive constant in the triangle inequality in wLp. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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3. Modified Zorko spaces and its properties.
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Hasanah, Dahliatul and Gunawan, Hendra
- Abstract
Despite being a generalization of Lebesgue spaces, Morrey spaces cannot be approximated by smooth functions. A subspace of a Morrey space was introduced in 1986 called a Zorko space whose every member could be approximated by smooth functions with compact support. As in the concept of differentiation in which the symmetric derivative has its advantages over the classical one, we modify the Zorko space into the symmetric types of Zorko spaces. In this paper, we discuss the relations of the Zorko space and the symmetric types of Zorko spaces. Some examples are provided to describe further the new subspaces. We also present the closedness and convolution properties of the symmetric types of Zorko spaces. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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4. Study of the need for bicycle lanes in Padang city.
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Adji, Bayu Martanto, Gunawan, Hendra, Putri, Amalia Yunia, and Rahendra, Muhazir
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BICYCLE lanes , *ROAD bicycles , *TRAFFIC flow , *CYCLING , *TRAFFIC speed , *BICYCLE design , *TRAFFIC lanes - Abstract
Reducing the use of motorized vehicles is one way to realize an environmental city and reduce congestion in Padang city. Bicycles are the proper transportation means to realize that. This study aims to determine the level of need for bicycle lanes. The study results can be used as input to stakeholders in Padang City regarding implementation of bicycle lanes on several roads in Padang City. This research was conducted at three street locations in Padang city, including Khatib Sulaiman Street, Samudera Street, and Jalan Hayam Wuruk Street. These three locations were chosen because they have different characteristics. The primary data in the study were geometric road data, traffic volume/flow data, vehicle speed data, and road pavement conditions. The road class study refers to Government Regulation (PP) no. 34/2006 concerning Roads. The type of bicycle lane used refers to the bicycle lane design criteria from the Center for Road and Bridge Research and Development (PUSJATAN), namely the bicycle lane on the road, both exclusive and inclusive. Data were analyzed using the Bicycle Level of Service (BLOS) method. Based on the analysis of the demand level for bicycle lanes by using the Bicycle Level of Service (BLOS) method, Khatib Sulaiman Street is unsuitable for bicycle lanes on the road carriageway because it is ineffective and unsafe for cyclists. The factors that caused Khatib Sulaiman Street to be less suitable for bicycle lanes on road carriageways were high vehicle speeds and high traffic volume/flow. Samudera Street is ideal for a bicycle lane on the carriageway because the environment is suitable for cyclists. The factors that make Samudera Street suitable for a bike lane are low vehicle speed and medium traffic volume/flow. Hayam Wuruk Street is suitable for a bicycle lane on a road carriageway because it is safe and good for cyclists. The factors that make Hayam Wuruk Street suitable for cyclists are low vehicle speed and low traffic volume/flow. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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5. Inclusion and Geometric Properties of Mixed Morrey Double-Sequence Spaces.
- Author
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Gunawan, Hendra, Hakim, Denny Ivanal, Ifronika, and Neswan, Oki
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In the continuous setting, Morrey spaces have been studied extensively, especially since the late 1960s. Meanwhile, Morrey sequence spaces, which are also known as discrete Morrey spaces, have only been developed by Gunawan et al. since 2018. In this article, we extend some known results on their inclusion properties and their (lack of) uniform nonsquareness to mixed Morrey double-sequence spaces, i.e. Morrey double-sequence spaces equipped with a mixed norm. As in the calculation of three geometric constants of Morrey spaces by Gunawan et al. in 2019, we also compute three geometric constants, namely Von Neumann-Jordan constant, James constant, and Dunkl-Williams constant for mixed Morrey double-sequence spaces. These constants measure uniformly nonsquareness of any Banach space. Through the values of the three constants, we reveal that mixed Morrey double-sequence spaces are not uniformly nonsquare. A relation between mixed Morrey double-sequence spaces and mixed Morrey spaces is also discussed. [ABSTRACT FROM AUTHOR]
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- 2024
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6. A new definition of strictly convex 2-normed spaces.
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Widyatma, Leo and Gunawan, Hendra
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The concept of 2-normed spaces was introduced by S. Gähler in 1964. Many notions of normed spaces have been extended to 2-normed space by many researchers, including the notion of convexity. In 1974, C. Diminnie and A. White defined uniformly convex 2-normed spaces and strictly convex 2-normed spaces. In this paper, we give a new definition of strictly convex 2-normed spaces and its geometric interpretation by choosing W = {span(x−y)}⊥. [ABSTRACT FROM AUTHOR]
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- 2024
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7. Dermoscopic features of nails in Leprosy patients in a tertiary referral hospital in West Java, Indonesia.
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Gunawan, Hendra and Nurani, Namira Bening
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NAIL diseases , *HANSEN'S disease , *DERMOSCOPY , *MEDICAL referrals , *CHRONIC granulomatous disease , *MYCOBACTERIUM leprae - Abstract
Introduction: Leprosy is a chronic granulomatous infectious disease, mainly affecting the skin and peripheral nerves, caused by the obligate intracellular bacteria Mycobacterium leprae. The disease has been discussed in several review articles in recent research, but as far as we know, only a few have addressed the effects of leprosy on nails, especially those who examine the dermoscopic features of nails in leprosy patients. Purposes: We aimed to document nail changes in leprosy patients and identify any particular findings through dermoscopic examination. Method: This was an observational study conducted in the Dermatology and Venereology Clinic of Hasan Sadikin Hospital, West Java, Indonesia, from March 2023 through May 2023. All patients have established cases of leprosy, and the diagnosis is based on clinical and bacteriological examinations. Recruitment was done through total sampling. Dermoscopic examination of all fingernails and toenails was performed at 10x magnification using a handheld dermatoscope (Heine DELTA 20 T Dermatoscope) in polarized mode without the linkage fluid to document the dermoscopic features. Result: Of a total of 19 patients, 15 had nail changes due to leprosy. Out of 15 patients, 13 patients were male. Patients below 25 years old had more nail changes. Most of the patients had a duration of disease greater than two years. Both fingers and toes were involved in nine patients. In this study, the most common dermoscopic feature found was the longitudinal ridge. Other dermoscopic features found in this study were transverse lines, onycholysis, longitudinal melanonychia, leukonychia, subungual hemorrhage, subungual hyperkeratosis, anonychia, and onychorrexis. Conclusion: Nail changes are found in leprosy patients and have a wide variety of clinical appearances. A dermoscopy should be performed to assess nail changes in leprosy. [ABSTRACT FROM AUTHOR]
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- 2024
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8. Functions in vanishing morrey spaces.
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Hasanah, Dahliatul, Gunawan, Hendra, and Tuwankotta, Johan Matheus
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SMOOTHNESS of functions , *FUNCTION spaces , *CONTINUOUS functions , *GENERALIZATION - Abstract
Morrey spaces can be considered as a generalization of Lebesgue spaces. In contrast to the approximation property of functions in Lebesgue spaces, not all functions in Morrey spaces can be approximated by smooth functions or even continuous ones. New types of vanishing Morrey spaces have been introduced by Almeida and Samko in 2017 to describe the approximation of functions in the subspaces by nice functions. In this paper, we study some properties of functions which belong to the vanishing Morrey spaces. We also give examples to further describe the new vanishing subspaces of Morrey spaces. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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9. On inclusion properties of discrete Morrey spaces.
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Gunawan, Hendra, Hakim, Denny Ivanal, and Idris, Mochammad
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EMBEDDING theorems - Abstract
We discuss a necessary condition for inclusion relations of weak type discrete Morrey spaces which can be seen as an extension of the results in [H. Gunawan, E. Kikianty and C. Schwanke, Discrete Morrey spaces and their inclusion properties, Math. Nachr. 291 2018, 8–9, 1283–1296] and [D. D. Haroske and L. Skrzypczak, Morrey sequence spaces: Pitt's theorem and compact embeddings, Constr. Approx. 51 2020, 3, 505–535]. We also prove a proper inclusion from weak type discrete Morrey spaces into discrete Morrey spaces. In addition, we give a necessary condition for this inclusion. Some connections between the inclusion properties of discrete Morrey spaces and those of Morrey spaces are also discussed. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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10. Challenging diagnosis of leprosy in a psychotic homeless patient with atypical clinical manifestations: an interesting case report.
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Gunawan, Hendra, Johan, Reyshiani, Achdiat, Pati Aji, and Suwarsa, Oki
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SYMPTOMS , *HANSEN'S disease , *DIAGNOSIS , *SKIN diseases , *HISTOPATHOLOGY , *ACUTE abdomen - Abstract
Background: A decision to diagnose certain skin diseases in patient undergoing psychotic break is challenging; this includes establishing the diagnosis of leprosy. Diagnosis of leprosy is established if there is at least one of the three cardinal signs of leprosy. Histopathological examination is not a gold standard, but remains useful in atypical or clinically suspicious cases.Case Presentation: We report for the first time, an interesting case of leprosy with atypical clinical manifestations in a psychotic homeless male with unknown history of present illness. Upon examination, hypopigmented macules, hyperpigmented macules, and plaques were observed, with unclear sensation impairment. Peripheral nerve thickening and acid-fast bacilli from slit-skin smear were not found. Histopathological examination from hypopigmented macule on the upper right limb showed no granulomatous reaction and other histopathological features of leprosy. Although the condition did not fulfill the cardinal signs of leprosy, we found lagophthalmos, claw hands, pseudomutilation of fingers and toes. Therefore, the diagnosis of suspected leprosy was established. The patient was hospitalized and attempts to administer oral rifampicin and clofazimine were made. Several days after treatment, annular erythematous macules appeared on the patient's face, abdomen, and back. Histopathological examination results on sample taken from erythematous macule and right sural nerve were consistent with the diagnosis of leprosy with reversal reaction.Conclusion: In certain conditions, histopathological examination of the skin and nerves are a highly rewarding test in establishing a diagnosis of leprosy. [ABSTRACT FROM AUTHOR]- Published
- 2021
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11. The study of effect pavement failure level on vehicle speed (case study: Padang Lua highway).
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Adji, Bayu Martanto, Putri, Elsa Eka, Gunawan, Hendra, and Adnani, Muhammad Rifki
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CRACKING of pavements , *TRAFFIC surveys , *ROAD users , *TRAFFIC flow , *SPEED - Abstract
Padang Lua Highway, Banuhampu District, Agam Regency is the primary arterial, a national road. There were types of pavement damage that occurred in several segments of the road. Road damage that occurs causes inconvenience to road users, such as a reduction in the speed of vehicles passing through the road. In this study, 1 km length of the road was studied. The length of the road studied was divided into 5 segments, each segment is 200 meters apart, which means for the 2-way roads studied, there were 10 segments. There are three types of data collected, namely road pavement failures data, vehicle speed, and vehicle volume. Road pavement failures surveys were carried out to obtain a PCI (Pavement Condition Index) value. Data collection was carried out using the inventory technique, by walking along the road to measure road damage per 200 meters. The recording of types and dimensions of damage is carried out on types of pavement damage. The vehicle speed survey was carried out using the Moving Car Observation method. The traffic volume survey is obtained by recording 3 types of vehicles and the direction of their movement across the road section by means of a manual survey. The results of the recording are entered in the form that has been provided previously, which are grouped according to the direction and flow of vehicles. This observation method was carried out based on PKJI, 2014 method. Furthermore, in the data analysis, the value of road conditions (PCI value) is sought for the studied road segment. Linear regression analysis was carried out to determine the effect of the level of road damage on vehicle speed (PCI value). F test was carried out to find out whether the effect was significant or not. The results showed that the types of damage that mostly occurred were alligator cracks, block cracks, edge cracks, patches, swelling, and weathering or raveling. However, in general, the condition of Padang Lua Highway, Banuhampu District, Agam Regency is in very good condition (very good) with an average PCI value is 56.15. The results of this analysis indicate that the vehicle speed decrease as the increasing of road damage level. In the regression analysis obtained a model, Y = 16,892+0,2051x, whereas, Y is the vehicle speed and x is the level of road damage, the effect of the level of road damage on vehicle speed is significant. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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12. A note on the g-angle between subspaces of a normed space.
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Nur, Muhammad and Gunawan, Hendra
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NORMED rings , *ALGEBRA - Abstract
We introduce a new 2-norm on a normed space using a semi-inner product g on the space. Using this 2-norm, we propose a formula for the g-angle between 2-dimensional subspaces in the space. Our formula serves as a revision of the one proposed by Nur et al. (Beitr. Algebra Geom. 59(1):133–143, 2018). [ABSTRACT FROM AUTHOR]
- Published
- 2021
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13. Frequent testicular involvement in multibacillary leprosy.
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Gunawan, Hendra, Achdiat, Pati Aji, Rahardjo, Rachel Marsella, Hindritiani, Reti, and Suwarsa, Oki
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HANSEN'S disease , *SEMEN analysis , *FOLLICLE-stimulating hormone , *LUTEINIZING hormone , *SYMPTOMS , *GYNECOMASTIA , *VARICOCELE - Abstract
• Testicular damage may occur before and while taking antileprotic treatment. • Testicular involvement in leprosy might occur in the absence of signs and symptoms. • The assessment of testicular function should be recommended as a routine work-up for leprosy patients. Testicular involvement or atrophy in leprosy is silent, unreported, and under-estimated. The aim of this study was to assess the frequency of testicular atrophy and its consequences through the examination of clinical manifestations, hormonal profile, and semen analysis in leprosy patients. A descriptive observational study using a cross-sectional design and consecutive sampling method was conducted from May to July 2018. The study was conducted in Dr. Hasan Sadikin General Hospital, Bandung, Indonesia and included 32 men affected by leprosy and five healthy men as a control group. All patients were subjected to history-taking, dermatological and genital examinations, assessment of follicle-stimulating hormone (FSH), luteinizing hormone (LH), and testosterone, and testicular ultrasonography examination. Semen analysis was performed for the 10 patients who consented. Testicular atrophy was observed in 93.75% of patients. Clinical manifestations of testicular atrophy were loss of libido (21.87%), female pubic hair pattern (9.38%), gynecomastia (6.25%), and secondary infertility (6.25%). Hormonal imbalance was seen in 16 patients, and all 10 patients who underwent semen analysis showed an abnormality. This study showed a high frequency of testicular atrophy, but the symptoms were only present in a few of patients. The assessment of testicular function should be recommended as a routine work-up for leprosy patients. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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14. Heavy Metal Residues In Water and Fishes at Karangsong Mangrove Conservation Area, Indramayu.
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Sihombing, Vivin Silvaliandra, Gunawan, Hendra, and Sawitri, Reny
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HEAVY metals , *PROTECTED areas , *HEAVY metal content of water , *MANGROVE forests , *ANALYSIS of heavy metals , *FISHES , *SEAWATER - Abstract
The study of heavy metal residues in water and fishes were conducted at Karangsong Mangrove Conservation Area, Indramayu. The samples were taken discretely in July 2016 at four stations representing the areas of fish pond, sea water, high density mangroves and low density mangroves. Observed parameters were heavy metals (Hg, Pb, and Cd), water quality (salinity, pH, BOD, COD, oils and fats), and nutrient contents (total phosphate, total nitrogen, and MBAS). Heavy metal residues in water and fishes were analyzed in laboratory of SEAMEO BIOTROP using Atomic Absorption Spectrophotometer (AAS) and ICP MS (for Cd and Pb). In 2008, the content of Cd in sea water was 0.034 mg/L, subsequently decreased to 0.0020 mg/L in 2016. Sea water Pb content in 2008 was 0.27 mg/L, later decreased to 0.0012 mg/L in 2016. Furthermore, the analysis results of heavy metal residues in water and fishes were exceeded the MRL (Maximum Residue Limit). Levels of heavy metals in fishes from 0.01 to 0.17 mg/L Hg; 0.92 to 3.87 mg/L Cd; 1.88 to 21.49 mg/L Pb above the threshold regulation of Ditjen POM RI No 03725/B/SK/VII/89. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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15. On Inner Products Derived From the Standard n-Inner Product on an Inner Product Space.
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Adam, Adam, Rante, Steven, and Gunawan, Hendra
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INNER product spaces , *ORTHOGONALIZATION , *ORTHONORMAL basis - Abstract
In this paper, we study relations between inner products derived from the standard n-inner product defined on an inner product space. In particular, we are interested in knowing when orthogonality with respect to the original inner product is preserved by the derived inner product. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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16. Overview of the eruptions of Sinabung Volcano, 2010 and 2013–present and details of the 2013 phreatomagmatic phase.
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Gunawan, Hendra, Surono, Budianto, Agus, Kristianto, Prambada, Oktory, McCausland, Wendy, Pallister, John, and Iguchi, Masato
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EARTHQUAKES , *LAVA domes , *VOLCANIC eruptions , *EMERGENCY management , *DISASTER relief , *HAZARD mitigation - Abstract
A small phreatic eruption of Sinabung Volcano, North Sumatra on 28 August 2010, at 18:30 local time marked the first eruption in the past ~ 1200 years. The eruption took place from two small vents in the south crater area. Explosions and ash emissions from these vents generated multiple ash plumes that reached altitudes of up to 5 km during early- to mid-September. By the end of September 2010, only low level steam plumes were visible and the alert level was reduced from Level 4 (highest) to Level 3. The 2010 eruption effectively ended at this time. Beginning two days after the initial 2010 eruption, activity of the eruption has been monitored continuously by a telemetered seismic network surrounding the volcano and by remotely sensed observations. This monitoring system was supplemented with a near-field continuous GPS network, beginning in February 2011. Persistent fumarolic emissions continued for almost 3 years following the 2010 eruption, before a new eruption began on 15 September 2013. This eruption continues to the present. The ongoing eruption is divided into 5 major phases: 1) phreatomagmatic phase (July 2013–18 December 2013); 2) first dome and collapse phase with pyroclastic density currents (PDCs; block-and-ash flows and related surges) to south (18 December 2013–10 January 2014); 3) lava-flow and collapse phase (10 January 2014–mid-September 2014); 4) second lava dome and collapse phase with PDCs to south (mid-September 2014–July 2015); 5) lava dome collapse and ash explosion phase with PDCs to southeast and east (August 2015–present). The volcano erupted intermittently during the early phreatomagmatic phase with small vertical ash explosions. Then the eruption became increasingly vigorous with more repetitive and intense vertical ash explosions during late October through November. The first small pyroclastic density currents (PDCs) began on November 1. These pyroclastic flows descended the southeastern flank to a distance of 2 km. Swarms of volcano-tectonic (VT) earthquakes and volcanic tremor lasting hours occurred repeatedly during the phreatomagmatic phase and some of these VT-swarms were followed by explosions. In early December 2013, during the transition between phreatomagmatic and dome-collapse phases, swarms of hybrid earthquakes took place preceding and accompanying dome growth. The first lava dome was observed in satellite images on 18 December near the main crater rim. Partial collapses of the dome produced PDCs beginning on 30 December. Growth of this first lava dome continued into January and was accompanied by additional collapses and PDCs. By about 10 January, the lava had transitioned from a summit dome morphology into a lava flow morphology. The resulting lava flow descended the southeast flank of the volcano, producing flow-front and marginal collapses with associated PCDs. One such flow-flank collapse on 2 February 2014 resulted in a PCD that killed 16. The lava flow phase continued through mid-September 2014, when a second summit lava dome began to grow and collapse, producing PDCs initially to the south and southeast, and then beginning in July 2015 to the east and southeast. The eruption of Sinabung resulted in major impacts on the population of the resort and farming area near the volcano and in the Ginting and Karo Regencies of North Sumatra. Local residents, having not experienced eruptions in their lifetimes, were initially curious and eager to receive any information about the eruption regardless of its source. Various institutions provided information with little coordination, resulting in confusion. With time communications have improved and communities and the responsible governments have become better prepared in dealing with the persistent eruption. The Government of Indonesia has provided funding to support villagers who lived within a 5 km radius danger zone to stay in relocation camps as a permanent relocation area is being identified. Unfortunately, on 21 May 2016, 9 additional fatalities took place in the village of Gamber, within the danger zone, when a dome collapse sent a pyroclastic density current into the area. Throughout the eruption, the volcano has been monitored by the Indonesian Center for Volcanology and Geologic Hazard Mitigation (CVGHM) in partnership with the USGS-USAID Volcano Disaster Assistance Program and the Disaster Prevention Research Institute of Kyoto University. Monitoring techniques have included seismic, geodetic, gas, satellite and field observations, as well as occasional sampling of ash and lava for geochemical analyses. In this paper, we summarize key aspects of the monitoring data, their interpretations and their use in forecasting eruptive behavior and in issuance of alerts and warnings. More detailed interpretations of the monitoring data and their use are found in other papers of this special issue. • In this introductory paper to the Special Issue on the eruptions of Sinabung and Kelud volcanoes, we focus on the 2010 and 2013–present eruptions of Sinabung volcano, North Sumatra, Indonesia. • We provide information on the monitoring system used and we highlight how the monitoring data (seismic, geodetic, gas and observations) were used to forecast activity and to issue alerts and warnings. • We also describe the chronology of the 2013-present eruption and we review how the eruption has impacted the lives of residents of the region. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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17. The eruptions of Sinabung and Kelud volcanoes, Indonesia.
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Kasbani, Gunawan, Hendra, McCausland, Wendy, Pallister, John, Iguchi, Masato, and Nakada, Setsuya
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VOLCANOES , *VOLCANIC eruptions , *VOLCANOLOGY , *SOCIETAL reaction , *REMOTE sensing , *PETROLOGY - Abstract
• The recent eruptions of Sinabung and Kelud volcanoes, contrast in both eruption style and crisis response. • This volume provides a wide range of volcanologic information on recent eruptions of Sinabung and Kelud. • Discussions of volcanology, petrology, geochemistry, remote sensing and the social response to the eruptions are included. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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18. Genotyping of Mycobacterium leprae in a Son-and-Father Pair of Patients Indicated the Possible Mode of Leprosy Transmission: a Case Report.
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Gunawan, Hendra, Fakhrosa, Irma, Saraswati, Nia Ayu, Sasmojo, Muljaningsih, Hindritiani, Reti, and Suwarsa, Oki
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MYCOBACTERIUM leprae , *HANSEN'S disease , *TANDEM repeats , *PERONEAL nerve , *INFECTIOUS disease transmission , *GENETIC techniques ,HANSEN'S disease diagnosis - Abstract
One of the success indicators of the World Health Organization (WHO) leprosy eradication program is the decreasing number of new cases of pediatric leprosy with a grade 2 disability. A case of borderline lepromatous (BL) leprosy with partial claw hand in a 13-year-old boy was reported. On physical examination, we found claw fingers on the fourth and fifth fingers of the left hand accompanied by hypoesthetic erythematous plaques on both cheeks. The patient also presented with the enlargement of bilateral great auricular, ulnar, and peroneal nerves. The bacteriological examination showed the bacterial index 3+ and morphological index 35%. The results of histopathological and serological anti-phenolic glycolipid-I examinations supported the diagnosis of BL type of leprosy. Genotyping of Mycobacterium leprae by variable number tandem repeat of the patient showed 24 copies thymine-thymine-cytosine that were similar to his father, who had been diagnosed with leprosy 12 years before, without adequate therapy. The result indicated the possibility of leprosy transmission from the father to a son. This case report revealed the presence of leprosy in children with a multibacillary infection who have been living with leprosy family members. Genotyping seems to be feasible for epidemiological analysis of leprosy transmission. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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19. THE HARDY AND HEISENBERG INEQUALITIES IN MORREY SPACES.
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GUNAWAN, HENDRA, HAKIM, DENNY IVANAL, NAKAI, EIICHI, and SAWANO, YOSHIHIRO
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HARDY classes , *HEISENBERG uncertainty principle , *MATHEMATICAL inequalities , *LAPLACE transformation , *FRACTIONAL powers , *FOURIER transforms - Abstract
We use the Morrey norm estimate for the imaginary power of the Laplacian to prove an interpolation inequality for the fractional power of the Laplacian on Morrey spaces. We then prove a Hardy-type inequality and use it together with the interpolation inequality to obtain a Heisenberg-type inequality in Morrey spaces. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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20. Discrete Morrey spaces and their inclusion properties.
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Gunawan, Hendra, Kikianty, Eder, and Schwanke, Christopher
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LEBESGUE integral , *BANACH spaces , *CAUCHY sequences , *REAL numbers , *DISCRETE groups - Abstract
Abstract: We discuss discrete Morrey spaces and their generalizations, and we prove necessary and sufficient conditions for the inclusion property among these spaces through an estimate for the characteristic sequences. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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21. Maximal and fractional integral operators on generalized Morrey spaces over metric measure spaces.
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Sihwaningrum, Idha, Gunawan, Hendra, and Nakai, Eiichi
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FRACTIONAL integrals , *INTEGRAL operators , *METRIC spaces , *RADON measures , *VECTOR-valued measures - Abstract
Abstract: We establish the boundedness and weak boundedness of the maximal operator and generalized fractional integral operators on generalized Morrey spaces over metric measure spaces ( X , d , μ ) without the assumption of the growth condition on μ. The results are generalization and improvement of some known results. We also give the vector‐valued boundedness. Moreover we prove the independence of the choice of the parameter in the definition of generalized Morrey spaces by using the geometrically doubling condition in the sense of Hytönen. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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22. Compressive Sensing Reconstruction Algorithm using L1-norm Minimization via L2-norm Minimization.
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Usman, Koredianto, Gunawan, Hendra, and Suksmono, Andriyan Bayu
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COMPRESSED sensing , *COMPUTER algorithms , *CONVEX functions , *COMPUTER simulation , *EUCLIDEAN distance , *GEOMETRY - Abstract
At the moment, there are two main methods of solving the compressive sensing (CS) reconstruction problem which are the convex optimization and the greedy algorithm. Convex optimization has good reconstruction stability but very slow in computation. Greedy algorithm, on the other hand, is very fast but less stable. A fast and stable CS reconstruction algorithm is necessary for a better provision of CS in practical application. In this paper we proposed a CS reconstruction algorithm using L1-norm minimization via L2-norm minimization. This method is based on geometrical interpretation of L1-norm minimization of the reconstruction problem and the fact that the Euclidean distance between L1-norm and L2-norm solution lie closely. In other word, if L2-norm solution is found, then direction to the L1-norm solution is on the shortest path connecting them. This approach offers a simpler computation. Computer simulation showed that proposed algorithm has better stability than the greedy algorithm and faster computation than the convex optimization. The proposed algorithm thus provides an alternative solution for CS reconstruction problem when a balance between speed and stability is required. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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23. On inclusion relation between weak Morrey spaces and Morrey spaces.
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Gunawan, Hendra, Hakim, Denny Ivanal, Nakai, Eiichi, and Sawano, Yoshihiro
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BANACH spaces , *DIFFERENTIAL inclusions , *EMBEDDINGS (Mathematics) , *MATHEMATICAL constants , *MATHEMATICAL transformations - Abstract
In this paper, the size of the embedding constant from weak Morrey spaces into Morrey spaces is specified. As a by-product, the difference between weak Morrey spaces and Morrey spaces is clarified. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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24. The Boundedness of Bessel-Riesz Operators On Morrey Spaces.
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Idris, Mochammad, Gunawan, Hendra, Lindiarni, Janny, and Eridani
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BESSEL functions , *RIESZ spaces , *LEBESGUE integral , *POLYNOMIAL operators , *KERNEL (Mathematics) - Abstract
In this paper, we shall discuss about Bessel-Riesz operators. Kurata et al. have investigated their boundedness on generalized Morrey spaces with weight. The boundedness of these operators on Lebesgue spaces and Morrey spaces will be reproved using a different approach. Moreover, we also find the norm of the operators are bounded by the norm of the kernels. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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25. A Comparison of Cathelicidin Levels in the Skin of Leprosy Patients and Their Household Contacts.
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Argentina, Fifa, Suwarsa, Oki, Gunawan, Hendra, and Berbudi, Afiat
- Subjects
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HANSEN'S disease , *BIVARIATE analysis , *HOUSEHOLDS , *ANTIMICROBIAL peptides , *UNIVARIATE analysis - Abstract
Objective. This study aimed to compare cathelicidin levels in the skin of leprae patients and leprae contacts. Patients and Methods. This research is an analytic observational study with a cross-sectional approach. Fifty-four research subjects participated in this study. They consisted of leprae patients, household contacts, and healthy individuals. Cathelicidin levels were measured using the ELISA method. Data analysis was carried out with the help of SPSS software, and univariate and bivariate analysis was conducted. Results. Cathelicidin levels in the leprae group (256.8±22.9 pg/ml) were higher than in the contact group (25.9±2.7 pg/ml). Likewise, the contact group had higher cathelicidin levels than healthy controls (1.4±0.1 pg/ml). Statistically, there were differences in cathelicidin levels between groups, P<0.050. Conclusion. Cathelicidin levels in leprae patients were higher than those in household contacts. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
26. Inclusion properties of generalized Morrey spaces.
- Author
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Gunawan, Hendra, Hakim, Denny I., Limanta, Kevin M., and Masta, Al A.
- Subjects
- *
SPACES of constant curvature , *SPACES of homogeneous type , *HYPERSURFACES , *HERMITIAN conjugate operators , *QUADRICS - Abstract
This paper discusses the structure of Morrey spaces, weak Morrey spaces, generalized Morrey spaces, and generalized weak Morrey spaces. Some necessary and sufficient conditions for the inclusion property of these spaces are obtained through a norm estimate for the characteristic functions of balls. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
27. Inclusion Properties of Orlicz and Weak Orlicz Spaces.
- Author
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Masta, Al Azhary, Gunawan, Hendra, and Budhi, Wono Setya
- Subjects
- *
ORLICZ spaces , *DIFFERENTIAL inclusions , *ALGEBRAIC spaces , *COMPUTATIONAL complexity , *MATHEMATICAL functions - Abstract
In this paper we discuss the structure of Orlicz spaces and weak Orlicz spaces on ℝn. We obtain some necessary and sufficient conditions for the inclusion property of these spaces. One of the keys is to compute the norm of the characteristic functions of the balls in ℝn. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
28. Evaluation of Scalp Hydration and pH Values in Hijab-Wearing and Non-Hijab-Wearing Women.
- Author
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Hidayah, Risa Miliawati Nurul, Widjaya, Muhamad Radyn Haryadi, Gunawan, Hendra, Sutedja, Endang, Dwiyana, Reiva Farah, and Sutedja, Eva Krishna
- Subjects
- *
HIJAB (Islamic clothing) , *SCALP , *HYDRATION , *BALDNESS , *PERIODIC health examinations - Abstract
Introduction: Indonesia is the most populous Muslim-majority country, where some women wear hijab covering their scalp and neck. Some hijab-wearing women complain of scalp problems eg, itch, dandruff, and hair loss, which might be related to severe and chronic skin barrier impairment due to occlusion. Excessive water accumulation in the occluded stratum corneum might result in increased permeability, followed by increased skin pH values. This study aimed to evaluate scalp hydration and pH values in hijab-wearing and non-hijab-wearing women.Material and Methods: This was a cross-sectional comparative analytical study using stratified random sampling methods conducted on 63 subjects, who were divided into two groups, consisting of 33 hijab-wearing and 30 non-hijab-wearing women. Both groups underwent physical examination and their medical history recorded. Scalp hydration was measured using a Corneometer (Courage + Khazaka, Koln, Germany), and scalp pH value was measured using a Skin & Scalp pH Tester (Hanna Instruments® HI981037, Rumania). This study was conducted at the Dermatology and Venereology Clinic of Hasan Sadikin General Hospital Bandung.Results: The mean scalp hydration and pH values were 18.34 ± 2.91 AU and 4.93 ± 0.17, respectively, in hijab-wearing women. Meanwhile, the mean scalp hydration and pH values were 17.71 ± 3.35 AU and 4.91 ± 0.16, respectively, in non-hijab-wearing women. The difference of scalp hydration and pH values between the groups was not statistically significant based on the independent t-test, with p-values of 0.430 and 0.597, respectively.Conclusion: Scalp hydration and pH values in hijab-wearing and non-hijab-wearing women did not differ significantly. Hijab-wearing women should not worry about scalp barrier impairment as long as they do not have any history of underlying scalp and skin disorders, and do not wear hijab in wet condition. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
29. The evaluation of road infrastructure (lane width) based on vehicle passing sight distance in platoon.
- Author
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Adji, Bayu Martanto, Putri, Elsa Eka, Gunawan, Hendra, Novela, Widya, Rahendra, Muhazir, and Monica, Krisna
- Subjects
- *
WIDENING of roads , *HIGHWAY law , *VEHICLES , *ROAD closures , *SAFETY regulations - Abstract
Platoon is a group of vehicles that move on the road together in close proximity. Vehicles speed in Platoon is almost equal. In the platoon, there will always be a vehicle trying to overtake another vehicle in front of the vehicle. To overtake the vehicle, driver must know the distance ahead for overtaking. Overtaking sight distance (Jd) is the distance that allows a vehicle to overtake another vehicle in front of the vehicle safely until the vehicle returns to its original lane. Based on the problems above, this research needs to be carried out with the aim of knowing the sight distance of overtaking vehicles in the platoon to overtake other vehicles and the potential of lane width widening base on the potential of the vehicle do the overtaking and based on the existing regulation. Data collection is done by recording traffic conditions using a handy cam. The Handy cam is placed on a tripod and in a safe place, which can properly record traffic conditions at a predetermined survey location. As the result, the maximum, average and, minimum speed during off-peak hours were higher than the speed at peak-hour conditions for Buttinggi-Padang and Padang-Bukttinggi direction. The majority of the vehicle (more than 50%) have the potential to overtake another vehicle. The segment road that was studied is the National, Arterial Primary Road. The existing lane width is 5.5 meter, each direction is 2.25-meter, undivided road. If there is a vehicle that will overtake another vehicle, the vehicle will take the path of the vehicle from the opposite direction. If the vehicle will overtake another vehicle, the driver must pay attention to the vehicle from the opposite direction. Based on the Law on Roads No. 38 of 2004, the width for primary arterial roads is 7 meters. Based the existing regulation and the safety, it was recommended to do the lane width widening on this segment road. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
30. Quality level of interlock brick with diatomaceous soil mixture based on compressive strength test.
- Author
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Malahayati, Nurul, Hayati, Yulia, and Gunawan, Hendra
- Subjects
- *
BRICKS , *COMPRESSIVE strength , *POTTING soils , *DIATOMACEOUS earth , *HOUSE construction , *MANUFACTURING processes , *CLAY soils , *THERMOLUMINESCENCE dating - Abstract
The type of material, the composition of the mixture, and the production process are the factors that affect the strength of the interlock brick. Interlock bricks in this study were used as the wall pairs construction of a house. The interlock brick forming mixture consists of cement, diatomaceous soil, sand, and water. Diatomaceous soil and sand used a maximum diameter of 4.75 mm and were not calcined. Interlock bricks with dimensions of 30 cm x 20 cm x 10 cm were produced with a manual hydraulic press and the maintenance period was up to 28 days, then cut into dimension test objects by 5 cm x 5 cm x 5 cm. A total of 150 specimens from 5 variations of mix designs using a water cement ratio (WCR) of 0.3; 0.4 and 0.5 were used in this study. The purpose of this study was to obtain the quality level of the interlock brick based on the compressive strength test at the age of the brick after 28 days. The quality level is based on compressive strength using the Indonesian National Standard, namely SNI 03-0349-1989. Based on the results of the compressive strength, the average interlock brick with a mixture of diatomaceous earth has a class III quality, which means that it can only be used as a non-structural wall pair. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
31. SOME FUNCTION SPACES AND THEIR APPLICATIONS TO ELLIPTIC PARTIAL DIFFERENTIAL EQUATIONS.
- Author
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Tumalun, Nicky K., Hakim, Denny I., and Gunawan, Hendra
- Subjects
- *
FUNCTION spaces , *GENERALIZED spaces - Abstract
In this paper we prove Fefferman's inequalities associated to potentials belonging to a generalized Morrey space or a Stummel class. We also show that the logarithm of a non-negative weak solution to a second order elliptic partial differential equation with potential in a generalized Morrey space or a Stummel class, under some assumptions, belongs to the bounded mean oscillation class. As a consequence, this elliptic partial differential equation has the strong unique continuation property. An example of an elliptic partial differential equation with potential in a Morrey space or a Stummel class which does not satisfy the strong unique continuation is presented. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
32. g*-Angle between two subspaces in the space of p-summable sequences.
- Author
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Nur, Muh, Islamiyati, Anna, and Gunawan, Hendra
- Subjects
- *
SEQUENCE spaces , *NEW product development , *NORMED rings - Abstract
We define a new semi-inner product g* on lp spaces for 1 ≤ p < ∞ equipped with a 2-norm. Using g*, we study the g*-angle between two vectors on lp. We also develop the notion of the g*-angle between a 1-dimensional subspace and an k-dimensional subspace for k ≥ 1 in the 2-normed space. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
33. Weak Type Inequalities for Some Integral Operators on Generalized Nonhomogeneous Morrey Spaces.
- Author
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Gunawan, Hendra, Hakim, Denny Ivanal, Yoshihiro Sawano, and Sihwaningrum, Idha
- Subjects
- *
MATHEMATICAL inequalities , *INTEGRAL operators , *FRACTIONAL integrals , *GENERALIZED spaces , *CHEBYSHEV systems , *HARDY-Littlewood method , *ORLICZ spaces - Abstract
We prove weak type inequalities for some integral operators, especially generalized fractional integral operators, on generalized Morrey spaces of nonhomogeneous type. The inequality for generalized fractional integral operators is proved by using two different techniques: one uses the Chebyshev inequality and some inequalities involving the modified Hardy-Littlewood maximal operator and the other uses a Hedberg type inequality and weak type inequalities for the modified Hardy-Littlewood maximal operator. Our results generalize the weak type inequalities for fractional integral operators on generalized non-homogeneousMorrey spaces and extend to some singular integral operators. In addition, we also prove the boundedness of generalized fractional integral operators on generalized non-homogeneous Orlicz-Morrey spaces. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF
34. GENERALIZED STUMMEL CLASS AND MORREY SPACES.
- Author
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Gunawan, Hendra, Eiichi Nakai, Yoshihiro Sawano, and Hitoshi Tanaka
- Subjects
- *
GENERALIZED spaces , *MATHEMATICAL reformulation , *GROUP extensions (Mathematics) , *SET theory , *MATHEMATICAL analysis , *GROUP theory - Abstract
We revisit the Stummel class and its relation with Morrey spaces. We reformulate a result of Ragusa and Zamboni [11] and then discuss its generalization, as proposed by Eridani and Gunawan [4]. An improvement of the results previously obtained by Eridani and Gunawan is obtained and some extensions are presented. [ABSTRACT FROM AUTHOR]
- Published
- 2012
- Full Text
- View/download PDF
35. Fractional Integrals and Generalized Olsen Inequalities.
- Author
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Gunawan, Hendra
- Subjects
- *
FRACTIONAL integrals , *MATHEMATICS , *MATHEMATICAL functions , *DIFFERENTIAL equations , *MULTIPLICATION - Abstract
Let Tp be the generalized fractional integral operator associated to a function ρ : (0,∞) → (0,∞), as defined in [16]. For a function W on ℝn, we shall be interested in the boundedness of the multiplication operator f ↦ W ·Tpf on generalized Morrey spaces. Under some assumptions on ρ, we obtain an inequality for W · Tρ, which can be viewed as an extension of Olsen's and Kurata-Nishigaki-Sugano's results. [ABSTRACT FROM AUTHOR]
- Published
- 2009
- Full Text
- View/download PDF
36. Characterization of Proteases, Proteins, and Eicosanoid-Like Substances in Soluble Extracts from Allergenic Pollen Grains.
- Author
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Gunawan, Hendra, Takai, Toshiro, Kamijo, Seiji, Wang, Xiao Ling, Ikeda, Shigaku, Okumura, Ko, and Ogawa, Hideoki
- Subjects
- *
POLLEN , *CONJUNCTIVITIS , *ASTHMA , *ALLERGENS , *ENZYMES , *ENDOPEPTIDASES , *GEL electrophoresis , *PROTEOLYTIC enzymes - Abstract
Background: Pollen is an important trigger of seasonal rhinitis, conjunctivitis, and/or allergic asthma, and an exacerbating factor in atopic dermatitis. Pollen grains contain allergen proteins, enzymes, and bioactive lipid mediators, the latter two possibly involved in the pathogenesis of allergic diseases through IgE-independent mechanisms. Methods: We analyzed the patterns of release of endopeptidases from allergenic pollen of Japanese cedar, Japanese cypress, and Rocky mountain juniper, which belong to the Cupressaceae/Taxodiaceae family, and birch, ragweed, and two grasses, Kentucky blue and cultivated rye, using synthetic substrates, class-specific inhibitors, and zymography. The proteins released were analyzed by gel electrophoresis. Eicosanoid-like substances were measured by enzyme-linked immunosorbent assays for prostaglandin E2 and leukotriene B4. Results: Major fractions of proteins, eicosanoid-like substances, and at least one molecular species of serine endopeptidase were released into phosphate-buffered saline from the pollen grains at 37°C within 25 min or 60 min without sonication. In the Cupressaceae/Taxodiaceae family, sonication was necessary for the release of other proteins and another serine endopeptidase. In birch, ragweed, and the grasses, most of the serine and cysteine endopeptidases were released without sonication. Proteases released within 25 min digested gelatin and/or casein differently among plant species. Conclusions: Grains of allergenic pollen release proteases, which can digest not only short synthetic substrates but also protein substrates, along with eicosanoid-like substances and proteins. The release of these components could contribute to the formation of a microenvironment optimum for initiation of the sensitization or the exacerbation of pollen allergy in tissues exposed to pollen grains. Copyright © 2008 S. Karger AG, Basel [ABSTRACT FROM AUTHOR]
- Published
- 2008
- Full Text
- View/download PDF
37. Protease Activity of Allergenic Pollen of Cedar, Cypress, Juniper, Birch and Ragweed.
- Author
-
Gunawan, Hendra, Takai, Toshiro, Ikeda, Shigaku, Okumura, Ko, and Ogawa, Hideoki
- Subjects
- *
PROTEOLYTIC enzymes , *POLLEN , *ALLERGENS , *CEDAR , *CYPRESS , *JUNIPERS , *BIRCH , *RAGWEEDS - Abstract
Background: Pollen is an important trigger of allergic rhinitis, conjunctivitis, and/or asthma, and an exacerbating factor in atopic dermatitis. Although it is proposed that protease activity from allergen sources, such as mites, enhances allergenicity, little information is available on that from relevant allergenic pollens such as Japanese cedar and Japanese cypress pollens, which are the major cause of pollinosis in Japan. Methods: We analyzed the protease activities derived from allergenic pollen of Japanese cedar, Japanese cypress, and Rocky mountain juniper, which belong to the Cupressaceae/Taxodiaceae family, and white birch and short ragweed, using synthetic substrates and class-specific inhibitors. Results: We found that the pollen of the three members of the Cupressaceae/Taxodiaceae family contained serine protease activity, that the pollen of white birch and short ragweed contained not only serine protease activity but also cysteine protease activity, that all five types of pollen tested contained at least one other type of serine protease, whose sensitivity to a serine protease-specific inhibitor was relatively low, and that the content and releasability of the pollen-derived proteases differed according to the plant families. Conclusions: Clinically relevant allergenic pollens tested in the present study can release serine and/or cysteine endopeptidases. Information on the spectrum of the endopeptidase activities from these allergenic pollen grains will be useful for investigating their contribution to the pathogenesis of allergies. [ABSTRACT FROM AUTHOR]
- Published
- 2008
- Full Text
- View/download PDF
38. Stummel Class and Morrey Spaces.
- Author
-
Gunawan, Hendra
- Subjects
- *
INTEGRAL equations , *SET theory , *ANALYTIC functions , *ANALYTIC spaces , *ALGEBRAIC functions , *INTEGRAL functions - Abstract
In this paper, we present some generalization of Ragusa and Zamboni's results on Stummel class and Morrey spaces. [ABSTRACT FROM AUTHOR]
- Published
- 2005
39. The effects of additives on optimizing composting performance with the biopore infiltration hole method.
- Author
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Ruslinda, Yenni, Mahdianti, Suci, Lestari, Resti Ayu, and Gunawan, Hendra
- Subjects
- *
COMPOSTING , *SOIL infiltration , *RICE hulls , *ORGANIC wastes , *FOOD waste , *RAW materials - Abstract
The Biopore Infiltration Hole (BIH) not only functions for composting organic waste but also for infiltration of water into the soil so that the composting humidity increases, especially during the rainy season. For this reason, adding additives that can improve the compost's structure and control the compost's humidity is necessary. This study aims to analyze the effects of adding additives to optimize BIH composting performance by analyzing compost's maturity, quality, and quantity. The additives used are sawdust and rice husks with composting variants: without adding additives, adding 100% sawdust, 100% rice husks, and 50% rice husks plus 50% sawdust. Variations in the weight of additives are 1.5% and 3% of the total weight of the compost raw material. Composting was carried out in open areas on loamy clay textures and water infiltration rates of 0.3 cm/hour. Compost raw materials consist of 50% food waste and 50% yard waste with a size of 0.3-1.5 cm. Testing the maturity and quality of the compost (physical and macro elements) showed that all variants met the compost standard according to SNI 19-7030-2004. Composting duration ranged from 38 to 47 days, with the quantity of solid compost produced 0.8-1.2 kg. From the data processing results using the ANOVA and correlation tests with a 95% confidence level, it was found that adding additives can accelerate the composting duration of 2-9 days and increase the quantity of solid compost by 12.50-50.00%. The evaluation of compost variants by scoring techniques showed that composting with the addition of 100% rice husks at 1.5% of the weight of the compost raw material is the most optimal variant in terms of analysis of compost maturity, quality, and quantity. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
40. Can Humans and Elephants Coexist? A Review of the Conflict on Sumatra Island, Indonesia.
- Author
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Kuswanda, Wanda, Garsetiasih, Raden, Gunawan, Hendra, Situmorang, Rospita Odorlina Pilianna, Hutapea, Freddy Jontara, Kwatrina, Rozza Tri, Karlina, Endang, Atmoko, Tri, Zahrah, Ma'rifatin, Takandjandji, Mariana, and Gunaryadi, Donny
- Subjects
- *
ELEPHANTS , *CORRIDORS (Ecology) , *COEXISTENCE of species , *FRAGMENTED landscapes , *ISLANDS , *HUMAN beings , *PROBLEM solving - Abstract
The high rate of deforestation and fragmentation of elephant habitat on Sumatra Island has triggered human-elephant conflict (HEC) in Sumatra Island, Indonesia. This conflict brings negative impacts on humans and elephants. Despite numerous efforts having been made to solve this problem, the HEC continues to occur in the remaining elephant enclave every year. The harmonious coexistence between humans and elephants could be improved through HEC mitigation programs. The aim of this paper was to review information on HEC in Sumatra Island, investigate the causes and implications of HEC, review existing HEC mitigation methods, and formulate strategies to improve the harmonious coexistence between humans and elephants. The best strategies to create successful human and elephant coexistence are strengthening the institutions and policies, restoring the habitat, developing wildlife corridors, establishing Essential Ecosystem Areas (EEA), community empowerment through ecotourism, providing legal access to forests through Social Forestry (SF), and providing compensation schemes for conflict victims. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
41. Three decades of the Orangutan Foundation's conservation programmes in Central Kalimantan, Indonesia.
- Author
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ROBERTSON, J. M. YARROW, LEIMAN, ASHLEY E., GUNAWAN, HENDRA, TAWAKKAL, IQBAL, PURBATRAPSILA, AZHARI, JAKIRUDIN, M., LAZUARDI, DIMAS Y. R., BANI, SYAHIK NUR, PRATAMA, MEYDINA, and PERDANA, YOGA
- Subjects
- *
HABITATS , *ORANGUTANS , *WILDLIFE conservation , *HABITAT conservation , *WILDLIFE refuges , *FOREST restoration - Abstract
Despite a large amount of information being published on the decline in orangutan populations, there is far less on the actions being taken to address the underlying reasons, which are the loss and degradation of their habitat, hunting, and fires. There is also limited understanding of the complementary role played by different parties conducting conservation efforts on the ground. Here we address this by describing the conservation programmes of the Orangutan Foundation that have developed over the past three decades to support the Indonesian government's efforts to conserve the Bornean Orangutan in Central Kalimantan Province, Indonesian Borneo. These programmes, which are mutually synergistic in a holistic approach to orangutan conservation, cover habitat and species protection in conservation areas, landscape conservation outside conservation areas, rescues of orangutans in danger and translocations to protected forests, restoration of degraded forest habitat, research, education and awareness, community involvement, and coordination with stakeholders. The achievements of these programmes are described, with a particular focus on the Lamandau Wildlife Reserve. The collaboration with the Ministry of Environment and Forestry's national and regional conservation agencies and related stakeholders shows how major progress can be made through a collaborative approach to planning and implementing conservation programmes. [ABSTRACT FROM AUTHOR]
- Published
- 2022
42. Community Perception Around Plantation Forest Area in Ulak Kedondong Village, towards Sumatran Elephant (Elephas maximus sumatranus) Disturbance.
- Author
-
Rianti, Anita, Garsetiasih, Raden, and Gunawan, Hendra
- Subjects
- *
ASIATIC elephant , *TREE farms , *ELEPHANTS , *COMMUNITY gardens , *RUBBER plantations - Abstract
The populations of Sumatran elephant are decreasing as the elephant are mostly killed in the conflict triggered by elephant disturbances to the community fields and gardens. Research on human-elephant conflict around Plantation Forest Area (PFA) was conducted in Ulak Kedondong Village, Cengal District, OKI Regency, from August to November 2017. The aim of the research was to determine elephant disturbances, perception and socioeconomic characteristic of the community toward elephant conservation value. Purposive random sampling was used to determine the respondents to be interviewed by using structured questionary. The results showed that the PFA area and community gardens of Ulak Kedondong Village in Cengal District were often suffered from elephant disturbances. The communities education level are mostly elementary school graduates (51.6%) and only 9.68% are high school graduates. The majority of respondents have the main occupation as farmers (88.9%). Elephant disturbances in the villages cause damage to community gardens especially rubber plantation leading to economic losses. The existence of elephant disturbances influence the community perceptions to the conservation of elephant negatively, as indicated by 91.7% of respondents stating that elephants are harmful and not useful. To minimize conflict, increasing feed availabilities through habitat enhancement are urgently needed. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
43. The Efficacy of Topical Formulation Containing Ciplukan (Physalis angulata Linn.) in Modulating Interleukin-17 and Interferon Gamma Expression in Mice (Mus musculus) Psoriasis Model.
- Author
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Suwarsa, Oki, Dharmadji, Hartati Purbo, Rohmawaty, Enny, Mareta, Shela, Gunawan, Hendra, Dwiyana, Reiva Farah, Achdiat, Pati Aji, Sutedja, Endang, and Pangastuti, Miranti
- Subjects
- *
INTERFERON gamma , *REVERSE transcriptase polymerase chain reaction , *MICE , *INTERLEUKIN-17 - Abstract
To assess the efficacy of topical ciplukan as an anti-inflammatory agent targeting the expression of IL-17 and IFN-γ.Methods: Psoriasis was induced using imiquimod cream, therefore divided into five groups. Group I, the psoriasis control group, received only imiquimod cream. Groups C1 and C2 received imiquimod cream followed by a mixture of Ciplukan and vaseline in a 1:2 and 1:4 ratio, respectively. Group M, the standard therapy group, received imiquimod cream, followed by mometasone furoate cream. Lastly, group V, the vehicle group, received imiquimod cream followed by vaseline album. Expression of IL-17 and IFN-γ in mice's skin tissue was analysed using reverse transcription polymerase chain reaction (RT-PCR) after seven days of treatment.Results: The mean expression of IL-17 in Group C1 (22.60) was significantly lower (p = 0.012) than in the psoriasis control group (23.60), and there was no significant difference (p = 0.613) in Group M (22.41). The mean expression of IFN-γ in Group C1 (26.97) and Group C2 (27.03) was also significantly lower (p = 0.026 and p = 0.026, respectively) than Group I (28.80), and there was no significant difference (p = 0.180 and p = 0.093, respectively) than Group M (26.03).Conclusion: Expression of IL-17 and IFN-γ in the ciplukan group is lower than in the psoriasis control group, and there is no significant difference compared to the standard therapy group. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
44. Hydrothermal System of the Papandayan Volcano from Temperature, Self-Potential (SP) and Geochemical Measurements.
- Author
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Byrdina, Svetlana, Revil, André, Gunawan, Hendra, Saing, Ugan B., and Grandis, Hendra
- Subjects
- *
HYDROTHERMAL deposits , *VOLCANOES , *TEMPERATURE , *ANALYTICAL geochemistry - Abstract
Papandayan volcano in West Java, Indonesia, is characterized by intense hydrothermal activities manifested by numerous fumaroles at three craters or kawah, i.e. Mas, Manuk and Baru. The latter was created after November 2002 phreatic eruption. Since 2011, numerous volcano-tectonic B events are encountered and the volcano was set on alert status on several occasions. The purpose of the present study is to delineate the structure of the summital hydrothermal system from Self-Potential (SP), soil temperature and gas concentrations in the soil (CO2, SO2 and H2S) data. This combination of geophysical and geochemical methods allows identification of the weak permeable zones serving as preferential pathways for hydrothermal circulation and potential candidates to future landslides or flank collapses. This study is an on-going collaborative research project and we plan to conduct electrical resistivity tomography (ERT) and also Induced-Polarization (IP) surveys. Additional data would allow the 3D imaging of the studied area. The IP parameters will be used to characterise and to quantify the degree of alteration of the volcanic rocks as has been shown very recently in the laboratory studies. There are also rocks and soil samples that will undergo laboratory analyses at ISTerre for IP and complex resistivity parameters at the sample scale that will help to interpret the survey results. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
45. Testicular atrophy and its clinical manifestations in a patient released from leprosy treatment.
- Author
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PATI AJI ACHDIAT, FADILLA, YOLA, GUNAWAN, HENDRA, and OKI SUWARSA
- Published
- 2018
- Full Text
- View/download PDF
46. IDENTIFIKASI FAKTOR SEBARAN MACAN DAHAN (Neofelis diardi Cuvier, 1823) DI EKOSISTEM RAWA GAMBUT, TAMAN NASIONAL SEBANGAU.
- Author
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KUNCAHYO, BANTISTA ADIS, ALIKODRA, HADI S., and GUNAWAN, HENDRA
- Abstract
The Sunda clouded leopard (Neofelis diardi Cuvier, 1823) is the largest predator and the keystone species on Borneo Island. Therefore, the existence of N. diardi is very important to maintain the stability and healthy of ecosystems in Kalimantan Forest. Sebangau National Park (SNP), Central Kalimantan Province is one of the important habitats for this species because it is formed by peat swamp ecosystem and it has function to maintain the balance of the global climate. Data of the distribution factors of N. diardi were expected to used for monitoring and inventorying of population this species, especially in SNP. Data collection was conducted from June until November 2014 through methods of 12 track-sets; 9 units camera traps; and signs of animal presence likely footprints, feces, claws, scratches, scrapes, and vocalizations in 2 grids, each size 6 x 6 km2. This study results show that the distribution of N. diardi is affected by five factors namely, the distance from water source (P = 0,002); the distance from the potential of disturbance (P = 0,017); forest canopy density (P= 0,04); peat depth (P = 0,002); and habitat types in the SNP (P = 0,011). Only the altitude factor does not affect the distribution of N. diardi (P = 0,064) at SNP. Furthermore, this study also indicates that the presence and abundance of animal preys as another factor affecting the distribution of N. diardi at SNP. This condition is caused by the tendency of N. diardi encounter in a RAI values of animal preys on medium-grade (9,38; 10,53) and high (14,52; 18,60; 18,60). Finally, this study also demonstrates that the existence of N. diardi can be considered as an indicator species for forest in good condition. [ABSTRACT FROM AUTHOR]
- Published
- 2016
47. Non-smooth atomic decomposition for generalized Orlicz-Morrey spaces.
- Author
-
Sawano, Yoshihiro, Hakim, Denny Ivanal, and Gunawan, Hendra
- Subjects
- *
ORLICZ spaces , *ALGEBRAIC spaces , *FUNCTION spaces , *BOUNDED mean oscillation , *TOPOLOGICAL spaces - Abstract
In the present paper, we consider the non-smooth atomic decomposition of generalized Orlicz-Morrey spaces. The result will be sharper than the existing results. As an application, we consider the boundedness of the bilinear operator, which is called the Olsen inequality nowadays. To obtain a sharp norm estimate, we first investigate their predual space, which is even new, and we make full advantage of the vector-valued inequality for the Hardy-Littlewood maximal operator. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
48. p-Summable sequence spaces with inner products.
- Author
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Konca, Şükran, Idris, Mochammad, and Gunawan, Hendra
- Subjects
- *
REAL numbers , *MATHEMATICAL sequences , *INNER product spaces , *INNER product , *VECTOR algebra - Abstract
We revisit the space lp of p-summable sequences of real numbers. In particular, we show that this space is actually contained in a (weighted) inner product space. The relationship between lp and the (weighted) inner product space that contains lp is studied. For p > 2 we also obtain a result which describe how the weighted inner product space is associated to the weights. [ABSTRACT FROM AUTHOR]
- Published
- 2015
49. Success of Intralesional Purified Protein Derivative Immunotherapy in the Treatment of Anogenital Warts: A Case Report.
- Author
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Achdiat, Pati Aji, Antariksa, Narizka Civiadenta, Rowawi, Rasmia, Suwarsa, Oki, Hidayat, Yudi Mulyana, Dwiyana, Reiva Farah, Gunawan, Hendra, and Hindritiani, Reti
- Subjects
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WARTS , *IMMUNOTHERAPY , *SEXUALLY transmitted diseases , *GAY men , *PROTEINS , *HYPERTROPHIC scars , *GENITAL warts - Abstract
Anogenital warts (AGW) are among the most common sexually transmitted infections worldwide. The condition may be persistent, increase in size and number, and have a high recurrence rate. There are many therapeutic options of AGW, but none of them prevented recurrence, only yielded partial responses and have the propensity to cause scars. Immunotherapy by purified protein derivative (PPD) is one of the therapeutic options for AGW, which effectively reduces the number of lesions until complete clearance, with minimal side effects and less recurrence rate. This case report aims to demonstrate the effectiveness, safety, and low recurrence rate of intralesional PPD injection as an alternative therapy for AGW. We reported one case of AGW in an immunocompetent 30-year-old homosexual man who was given 3 doses of 0.2 mL PPD injected intralesionally. As a result, clinical improvement was observed starting from the 18th day, with some of the lesions decreasing in size, and on the 46th day, all of the lesions disappeared. There was no significant side effect. Within two years of follow-up, no recurrence was observed. Intralesional injection of PPD can stimulate the immune response against human papillomavirus (HPV) infection both on the injection site and distant from the injection site. Previous studies have shown promising results of intralesional PPD, with low recurrence in over six-month follow-up and no side effects. Intralesional injection of PPD can be considered as an alternative therapy due to its minimal side effects and its long-term low recurrence rate. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
50. Epidemiology of Leprosy in Indonesia: a Retrospective Study.
- Author
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Prakoeswa, Cita Rosita Sigit, Lubis, Ramona Sari, Anum, Qaira, Argentina, Fifa, Menaldi, Sri Linuwih, Gunawan, Hendra, Yuniati, Renni, Mulianto, Nur Rachmat, Siswati, Agnes Sri, Widasmara, Dhelya, Rusyati, Luh Made Mas, Mamuaja, Enricco Hendra, Muchtar, Vitayani, Agusni, Regitta Indira, Kusumaputra, Bagus Haryo, Alinda, Medhi Denisa, and Listiawan, Muhammad Yulianto
- Published
- 2022
- Full Text
- View/download PDF
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